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(阅读‹Æ¡æ•°åQ?script src="/plus/count.php?view=yes&aid=148&mid=1"type='text/javascript' language="javascript"></script>)</strong></span></td> </tr> <tr> <td> </td> </tr> <tr> <td height="1" align="left" valign="top"><p style="margin: 0px; padding: 0px; font-size: 16px; color: rgb(102, 102, 102); clear: both; font-family: "Helvetica Neue", Helvetica, "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif; line-height: 25.6px;"> <span style="font-size:14px;"><span style="color: rgb(62, 62, 62); font-family: Simsun; line-height: 1.5em;">    当光从光¾U¤çš„一端射入,从另一端射出时åQŒå…‰çš„强度会减弱。这意味着光信号通过光纤传播后,光能量衰减了一部分。这说明光纤中有某些物质或因某种原因åQŒé˜»æŒ¡å…‰ä¿¡å·é€šè¿‡ã€‚è¿™ž®±æ˜¯å…‰çº¤çš„传输损耗。只有降低光¾U¤æŸè€—,才能使光信号畅通无阅R€?/span></span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;">  </p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  <strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">1、造成光纤衰减的主要因素有</strong>åQ?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  本征åQŒå¼¯æ›ÔŒ¼ŒæŒ¤åŽ‹åQŒæ‚质,不均匀和对接等ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  本征åQšæ˜¯å…‰çº¤çš„固有损耗,包括åQšç‘žåˆ©æ•£ž®„,固有吸收½{‰ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  弯曲åQšå…‰¾U¤å¼¯æ›²æ—¶éƒ¨åˆ†å…‰çº¤å†…的光会因散ž®„而损失掉åQŒé€ æˆæŸè€—ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  挤压åQšå…‰¾U¤å—到挤压时产生微小的弯曲而造成的损耗ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  杂质åQšå…‰¾U¤å†…杂质吸收和散ž®„在光纤中传播的光,造成的损失ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  不均匀åQšå…‰¾U¤ææ–™çš„折射率不均匀造成的损耗ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  å¯ÒŽŽ¥åQšå…‰¾U¤å¯¹æŽ¥æ—¶äº§ç”Ÿçš„损耗,如:不同è½?单模光纤同èáu度要求小äº?.8μm)åQŒç«¯é¢ä¸Žè½´å¿ƒä¸åž‚ç›ß_¼Œç«¯é¢ä¸åã^åQŒå¯¹æŽ¥å¿ƒå¾„不匚w…å’Œç†”接质量差½{‰ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  当光从光¾U¤çš„一端射入,从另一端射出时åQŒå…‰çš„强度会减弱。这意味着光信号通过光纤传播后,光能量衰减了一部分。这说明光纤中有某些物质或因某种原因åQŒé˜»æŒ¡å…‰ä¿¡å·é€šè¿‡ã€‚è¿™ž®±æ˜¯å…‰çº¤çš„传输损耗。只有降低光¾U¤æŸè€—,才能使光信号畅通无阅R€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;"> <strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"> 2、光¾U¤æŸè€—的分类</strong></span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  光纤损耗大致可分äؓ光纤å…ähœ‰çš„固有损耗以及光¾U¤åˆ¶æˆåŽç”׃‹É用条仉™€ æˆçš„附加损耗。具体细分如下:</span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  光纤损耗可分äؓ固有损耗和附加损耗ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  固有损耗包括散ž®„损耗、吸收损耗和因光¾U¤ç»“构不完善引è“v的损耗ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  附加损耗则包括微弯损耗、弯曲损耗和接箋损耗ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  其中åQŒé™„加损耗是在光¾U¤çš„é“ø™®¾˜q‡ç¨‹ä¸­äh为造成的。在实际应用中,不可避免地要ž®†å…‰¾U¤ä¸€æ ÒŽŽ¥ä¸€æ ¹åœ°æŽ¥è“v来,光纤˜qžæŽ¥ä¼šäñ”生损耗。光¾U¤å¾®ž®å¼¯æ›ŒÓ€æŒ¤åŽ‹ã€æ‹‰ä¼¸å—力也会引èµähŸè€—。这些都是光¾U¤ä‹É用条件引èµïLš„损耗。究其主要原因是在这些条件下åQŒå…‰¾U¤çº¤èŠ¯ä¸­çš„传输模式发生了变化。附加损耗是可以ž®½é‡é¿å…çš„。下面,我们只讨论光¾U¤çš„固有损耗ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  固有损耗中åQŒæ•£ž®„损耗和吸收损耗是由光¾U¤ææ–™æœ¬íw«çš„ç‰ÒŽ€§å†³å®šçš„åQŒåœ¨ä¸åŒçš„工作æ‡L长下引è“v的固有损耗也不同。搞清楚产生损耗的机理åQŒå®šé‡åœ°åˆ†æžå„种因素引è“v的损耗的大小åQŒå¯¹äºŽç ”制低损耗光¾U¤ï¼Œåˆç†ä½¿ç”¨å…‰çº¤æœ‰ç€æžå…¶é‡è¦çš„意义ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;"> <strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"> 3、材料的吸收损è€?/strong></span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  刉™€ å…‰¾U¤çš„材料能够吸收光能。光¾U¤ææ–™ä¸­çš„粒子吸收光能以后,产生振动、发热,而将能量散失掉,˜q™æ ·ž®×ƒñ”生了吸收损耗ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  我们知道åQŒç‰©è´¨æ˜¯ç”±åŽŸå­ã€åˆ†å­æž„成的åQŒè€ŒåŽŸå­åˆç”±åŽŸå­æ ¸å’Œæ ¸å¤–电子组成,电子以一定的轨道围绕原子核旋转。这ž®±åƒæˆ‘们生活的地球以及金星、火星等行星都围¾l•å¤ªé˜Ïx—‹è½¬ä¸€æ øP¼Œæ¯ä¸€ä¸ªç”µå­éƒ½å…ähœ‰ä¸€å®šçš„能量åQŒå¤„在某一轨道上,或者说每一轨道都有一个确定的能çñ”。距原子核近的轨道能¾U§è¾ƒä½Žï¼Œè·åŽŸå­æ ¸­‘Šè¿œçš„轨道能¾U§è¶Šé«˜ã€‚轨道之间的˜q™ç§èƒ½çñ”差别的大ž®å°±å«èƒ½¾U§å·®ã€‚当电子从低能çñ”向高能çñ”跃迁æ—Óž¼Œž®Þp¦å¸æ”¶ç›¸åº”¾U§åˆ«çš„能¾U§å·®çš„能量ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  在光¾U¤ä¸­åQŒå½“某一能çñ”的电子受åˆîC¸Žè¯¥èƒ½¾U§å·®ç›¸å¯¹åº”的波长的光照射æ—Óž¼Œåˆ™ä½äºŽä½Žèƒ½çñ”轨道上的电子ž®†è·ƒ˜qåˆ°èƒ½çñ”高的轨道上。这一电子吸收了光能,ž®×ƒñ”生了光的吸收损耗ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  刉™€ å…‰¾U¤çš„基本材料二氧化硅(SiO2)本èínž®±å¸æ”¶å…‰åQŒä¸€ä¸ªå«ç´«å¤–吸收åQŒå¦å¤–一个叫¾U¢å¤–吸收。目前光¾U¤é€šä¿¡ä¸€èˆ¬ä»…工作åœ?.8ï½?.6μm波长区,因此我们只讨è®ø™¿™ä¸€å·¥ä½œåŒºçš„损耗ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  矌™‹±çŽÈ’ƒä¸­ç”µå­è·ƒ˜qäñ”生的吸收峰在紫外区的0.1ï½?.2μm波长左右。随着波长增大åQŒå…¶å¸æ”¶ä½œç”¨é€æ¸å‡å°åQŒä½†å½±å“åŒºåŸŸå¾ˆå®½åQŒç›´åˆ?μm以上的æ‡Lé•Ñ€‚不˜q‡ï¼Œç´«å¤–吸收对在¾U¢å¤–区工作的矌™‹±å…‰çº¤çš„媄响不大。例如,åœ?.6μm波长的可见光区,紫外吸收可达1dB/kmåQŒåœ¨0.8μm波长旉™™åˆ?.2ï½?.3dB/kmåQŒè€Œåœ¨1.2μm波长æ—Óž¼Œå¤§çº¦åªæœ‰0.ldB/km.</span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  矌™‹±å…‰çº¤çš„红外吸收损耗是ç”Þqº¢å¤–区材料的分子振动äñ”生的。在2μm以上波段有几个振动吸收峰。由于受光纤中各¿UæŽºæ‚元素的影响åQŒçŸ³è‹±å…‰¾U¤åœ¨2μm以上的æ‡LŒDµä¸å¯èƒ½å‡ºçŽ°ä½ŽæŸè€—窗口,åœ?.85μm波长的理论极限损耗äؓldB/km.</span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  通过研究åQŒè¿˜å‘现矌™‹±çŽÈ’ƒä¸­æœ‰ä¸€äº?quot;破坏分子"在捣乱,主要是一些有完™¿‡æ¸¡é‡‘属杂质,如铜、铁、铬、锰½{‰ã€‚è¿™äº?quot;坏蛋"在光照射下,贪婪地吸收光能,ä¹Þp¹¦ä¹ÞpŸ©åQŒé€ æˆäº†å…‰èƒ½çš„损失。清é™?quot;捣äؕ分子"åQŒå¯¹åˆ‰™€ å…‰¾U¤çš„材料˜q›è¡Œæ ¼çš„化学提纯åQŒå°±å¯ä»¥å¤§å¤§é™ä½ŽæŸè€—ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  矌™‹±å…‰çº¤ä¸­çš„另一个吸收源是氢氧根(OHˉ)期的研究åQŒäh们发现氢氧根在光¾U¤å·¥ä½œæ‡LŒDµä¸Šæœ‰ä¸‰ä¸ªå¸æ”¶å³°åQŒå®ƒä»¬åˆ†åˆ«æ˜¯0.95μmã€?.24μmå’?.38μmåQŒå…¶ä¸?.38μm波长的吸收损耗最ä¸ÞZ¸¥é‡ï¼Œå¯¹å…‰¾U¤çš„影响也最大。在1.38μm波长åQŒå«é‡ä»…å?.0001的氢氧根产生的吸收峰损耗就高达33dB/km.</span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  ˜q™äº›æ°¢æ°§æ ÒŽ˜¯ä»Žå“ªé‡Œæ¥çš„å‘¢?氢氧根的来源很多åQŒä¸€æ˜¯åˆ¶é€ å…‰¾U¤çš„材料中有水分和氢氧化合物åQŒè¿™äº›æ°¢æ°§åŒ–合物在原料提¾U¯è¿‡½E‹ä¸­ä¸æ˜“被清除掉åQŒæœ€åŽä»ä»¥æ°¢æ°§æ ¹çš„åŞ式残留在光纤ä¸?二是刉™€ å…‰¾U¤çš„氢氧物中含有ž®‘量的水åˆ?三是光纤的制造过½E‹ä¸­å› åŒ–学反应而生成了æ°?四是外界½Iºæ°”的进入带来了水蒸气。然而,现在的制造工艺已¾lå‘展到了相当高的水òq»I¼Œæ°¢æ°§æ ¹çš„含量已经降到了èƒö够低的程度,它对光纤的媄响可以忽略不计了ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  <strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">4、散ž®„损è€?/strong></span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  在黑夜里åQŒç”¨æ‰‹ç”µ½{’向½IÞZ¸­ç…§å°„åQŒå¯ä»¥çœ‹åˆîC¸€æŸå…‰æŸ±ã€‚äh们也曄¡œ‹åˆ°è¿‡å¤œç©ºä¸­æŽ¢ç…§ç¯å‘出¾_—大光柱。那么,ä¸ÞZ»€ä¹ˆæˆ‘们会看见˜q™äº›å…‰æŸ±å‘?˜q™æ˜¯å› äؓ有许多烟雾、灰ž®˜ç­‰å¾®å°é¢—ç²’‹¹®æ¸¸äºŽå¤§æ°”之中,光照ž®„在˜q™äº›é¢—粒上,产生了散ž®„,ž®±å°„向了四面八方。这个现象是ç”Þq‘žåˆ©æœ€å…ˆå‘现的åQŒæ‰€ä»¥äh们把˜q™ç§æ•£å°„命名ä¸?quot;瑞利散射"ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  散射是怎样产生的呢?原来¾l„成物质的分子、原子、电子等微小¾_’子是以某些固有频率˜q›è¡ŒæŒ¯åŠ¨çš„,òq¶èƒ½é‡Šæ”¾å‡ºæ‡L长与该振动频率相应的光。粒子的振动频率ç”Þq²’子的大小来决定。粒子越大,振动频率­‘Šä½ŽåQŒé‡Šæ”‘Ö‡ºçš„光的æ‡L长越é•?¾_’子­‘Šå°åQŒæŒ¯åŠ¨é¢‘率越高,释放出的光的波长­‘ŠçŸ­ã€‚è¿™¿UæŒ¯åŠ¨é¢‘率称做粒子的固有振动频率。但是这¿UæŒ¯åŠ¨åƈ不是自行产生åQŒå®ƒéœ€è¦ä¸€å®šçš„能量。一旦粒子受到具有一定æ‡L长的光照ž®„,而照ž®„光的频率与该粒子固有振动频率相同,ž®×ƒ¼šå¼•è“v共振。粒子内的电子便以该振动频率开始振动,¾l“果是该¾_’子向四面八æ–ÒŽ•£ž®„出光,入射光的能量被吸收而è{化äؓ¾_’子的能量,¾_’子又将能量重新以光能的形式ž®„出厅R€‚因此,对于在外部观察的人来è¯ß_¼Œçœ‹åˆ°çš„好像是光撞到粒子以后,向四面八斚w£žæ•£å‡ºåŽÖMº†ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  光纤内也有瑞利散ž®„,由此而äñ”生的光损耗就¿UîCؓ瑞利散射损耗。鉴于目前的光纤刉™€ å·¥è‰ºæ°´òq»I¼Œå¯ä»¥è¯´ç‘žåˆ©æ•£ž®„损耗是无法避免的。但是,ç”׃ºŽç‘žåˆ©æ•£å°„损耗的大小与光波长çš?‹Æ¡æ–¹æˆåæ¯”,所以光¾U¤å·¥ä½œåœ¨é•¿æ‡L长区æ—Óž¼Œç‘žåˆ©æ•£å°„损耗的影响可以大大减小ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  <strong style="margin: 0px; padding: 0px; max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">5、先天不­‘»I¼ŒçˆÞpŽ«èƒ½åŠ©</strong></span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  光纤¾l“构不完善,如由光纤中有气æˆö、杂质,或者粗¾l†ä¸å‡åŒ€åQŒç‰¹åˆ«æ˜¯èŠ?包层交界面不òqÏx»‘½{‰ï¼Œå…‰çº¿ä¼ åˆ°˜q™äº›åœ°æ–¹æ—Óž¼Œž®×ƒ¼šæœ‰ä¸€éƒ¨åˆ†å…‰æ•£ž®„到各个方向åQŒé€ æˆæŸè€—。这¿UæŸè€—是可以惛_Šžæ³•å…‹æœçš„åQŒé‚£ž®±æ˜¯è¦æ”¹å–„å…‰¾U¤åˆ¶é€ çš„工艺ã€?/span></p> <p style="margin: 10px 0px; padding: 0px; font-size: medium; color: rgb(62, 62, 62); font-family: Simsun; clear: both; max-width: 100%; min-height: 1em; line-height: 1.5em; box-sizing: border-box !important; word-wrap: break-word !important;"> <span style="font-size:14px;">  散射使光ž®„向四面八方åQŒå…¶ä¸­æœ‰ä¸€éƒ¨åˆ†æ•£å°„光沿着与光¾U¤ä¼ æ’­ç›¸åçš„方向反射回来åQŒåœ¨å…‰çº¤çš„å…¥ž®„端可接收到˜q™éƒ¨åˆ†æ•£ž®„光。光的散ž®„ä‹É得一部分光能受到损失åQŒè¿™æ˜¯äh们所不希望的。但是,˜q™ç§çŽ°è±¡ä¹Ÿå¯ä»¥äؓ我们所利用åQŒå› ä¸ºå¦‚果我们在发送端å¯ÒŽŽ¥æ”¶åˆ°çš„这部分光的强弱˜q›è¡Œåˆ†æžåQŒå¯ä»¥æ£€æŸ¥å‡º˜q™æ ¹å…‰çº¤çš„断炏V€ç¼ºé™·å’ŒæŸè€—大ž®ã€‚è¿™æ øP¼Œé€šè¿‡äººçš„聪明才智åQŒå°±æŠŠåäº‹å˜æˆäº†å¥½äº‹ã€?/span></p> </td> </tr> <tr align="center"> <td align="right">ã€?a href="#" onClick="javascript:window.close(); return false;"><font color="#000000">关闭½H—口</font></a>ã€?/td> </tr> </table></td> </tr> <tr> <td align="center" background="/images/hui-3.jpg"> </td> </tr> <tr> <td><img src="/picture/hui-2.jpg" width="710" height="11" /></td> </tr> <tr> <td> </td> </tr> </table> </td> </tr> <td width="220" align="center" valign="top" bgcolor="#D6E8F6"><br /> <table width="90%" border="0" cellpadding="0" cellspacing="0"> <tr> <td style="padding-bottom: 15px;"> <form action="/plus/search.php" name="formsearch"> <input type="hidden" name="kwtype" value="0" /> <input type='hidden' name='typeid' value="2"> <input type="text" name="q" style=" width: 120px; margin-left: 10px; "> <input type="submit" name="submit" value="搜烦" /> </form> </td> </tr> <tr> <td align="center" valign="bottom"><img src="/picture/2.jpg" width="186" height="38" /></td> </tr> <tr> <td height="15"></td> </tr> </table> <table width="181" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="22" align="center" background="/images/cpfl-2.jpg" class="z2"><strong><a href="/a/chanpinzhanshi/guangxianrongjieshebeijipeijian/" target="_self">光纤熔接讑֤‡åŠé…ä»?/a></strong></td> </tr> <tr> <td align="center" background="/images/cpfl-3.jpg"> <table width="92%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10" colspan="2"></td> </tr> <tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangxianrongjieshebeijipeijian/danxinguangqianrongjieji" target="_self">国äñ”光纤熔接æœ?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangxianrongjieshebeijipeijian/daizhuangguanqianrongjieji" target="_self">带状光纤熔接æœ?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangxianrongjieshebeijipeijian/pixianguangqianrongjieji" target="_self">˜q›å£å…‰çº¤ç†”接æœ?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangxianrongjieshebeijipeijian/guangqianqiegedao" target="_self">光纤切割刀</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangxianrongjieshebeijipeijian/guangqianrongjiejipeijianjihaocai" target="_self">光纤熔接机配件及耗材</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangxianrongjieshebeijipeijian/guanglanjiguanqian" target="_self">光缆及光¾U?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangxianrongjieshebeijipeijian/guangqiandaohuchanpin" target="_self">光纤到户产品</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangxianrongjieshebeijipeijian/baopianguangqianrongjieji" target="_self">保偏光纤熔接æœ?/a></td> </tr> <tr> <td height="15" colspan="2"></td> </tr> </table></td> </tr><tr> <td height="22" align="center" background="/images/cpfl-2.jpg" class="z2"><strong><a href="/a/chanpinzhanshi/guangshiyufansheyijipeijian/" target="_self">光时域反ž®„äÈA及配ä»?/a></strong></td> </tr> <tr> <td align="center" background="/images/cpfl-3.jpg"> <table width="92%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10" colspan="2"></td> </tr> <tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangshiyufansheyijipeijian/guangshiyufansheyi_OTDR_" target="_self">光时域反ž®„äÈAåQˆOTDRåQ?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangshiyufansheyijipeijian/mokuaishiOTDR" target="_self">模块式OTDR</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangshiyufansheyijipeijian/OTDRka" target="_self">OTDRå?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a 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href="/a/chanpinzhanshi/guangtongxunzhuanyeceshiyibiao/guangxianjiachiqian" target="_self">光纤å¤ÒŽŒé’?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangtongxunzhuanyeceshiyibiao/guangxianshibieqi" target="_self">光纤识别å™?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangtongxunzhuanyeceshiyibiao/kediaoguangshuaijianqi" target="_self">可调光衰减器</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangtongxunzhuanyeceshiyibiao/jiguangcejuyi" target="_self">‹È€å…‰æµ‹è·äÈA</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guangtongxunzhuanyeceshiyibiao/guangwangluozongheceshiyi" target="_self">光网¾lœç»¼åˆæµ‹è¯•äÈA</a></td> </tr> <tr> <td height="15" colspan="2"></td> </tr> </table></td> </tr><tr> <td height="22" align="center" background="/images/cpfl-2.jpg" class="z2"><strong><a href="/a/chanpinzhanshi/guanglanjiancejigaojingxitong/" target="_self">光缆监测及告警系¾l?/a></strong></td> </tr> <tr> <td align="center" background="/images/cpfl-3.jpg"> <table width="92%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10" colspan="2"></td> </tr> <tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanjiancejigaojingxitong/guanglanjiancexitongyuanduanceshi" target="_self">光缆监测¾pȝ»Ÿ˜qœç«¯‹¹‹è¯•</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanjiancejigaojingxitong/OTDRka" target="_self">OTDRå?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanjiancejigaojingxitong/guangkaiguan" target="_self">光开å…?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanjiancejigaojingxitong/guanggonglvgaojingjiancedanyuan" target="_self">光功率告警监‹¹‹å•å…?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanjiancejigaojingxitong/jijiashigaowendingguangyuan" target="_self">机架式高½E›_®šå…‰æº</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanjiancejigaojingxitong/guangluzidongqiehuanbaohuxitong" target="_self">光èµ\自动切换保护¾pȝ»Ÿ</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanjiancejigaojingxitong/qitaguangjianceqijian" target="_self">其它光监‹¹‹å™¨ä»?/a></td> </tr> <tr> <td height="15" colspan="2"></td> </tr> </table></td> </tr><tr> <td height="22" align="center" background="/images/cpfl-2.jpg" class="z2"><strong><a href="/a/chanpinzhanshi/chuanshujishujuceshiyibiao/" target="_self">传输及数据测试äÈAè¡?/a></strong></td> </tr> <tr> <td align="center" background="/images/cpfl-3.jpg"> <table width="92%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10" colspan="2"></td> </tr> <tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/chuanshujishujuceshiyibiao/wumaceshiyi" target="_self">误码‹¹‹è¯•ä»?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/chuanshujishujuceshiyibiao/SDH_PDH_ATMfenxiyi" target="_self">SDH/PDH/ATM分析ä»?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/chuanshujishujuceshiyibiao/yitaiwangceshiyi" target="_self">以太¾|‘测试äÈA</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/chuanshujishujuceshiyibiao/PMDpianzhenmosesanfenxiyi" target="_self">PMD偏振模色散分析äÈA</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/chuanshujishujuceshiyibiao/dianlanwangluoceshiyi" target="_self">ç”늼†¾|‘络‹¹‹è¯•ä»?/a></td> </tr> <tr> <td height="15" colspan="2"></td> </tr> </table></td> </tr><tr> <td height="22" align="center" background="/images/cpfl-2.jpg" class="z2"><strong><a href="/a/chanpinzhanshi/guanglanshigongjiweihugongju/" target="_self">光缆施工及维护工å…?/a></strong></td> </tr> <tr> <td align="center" background="/images/cpfl-3.jpg"> <table width="92%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10" colspan="2"></td> </tr> <tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanshigongjiweihugongju/guanglanshigonggongju" target="_self">光缆施工工具</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanshigongjiweihugongju/guanglanqingjiegongju" target="_self">光缆清洁工具</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/guanglanshigongjiweihugongju/dianlanshigonggongju" target="_self">ç”늼†æ–½å·¥å·¥å…·</a></td> </tr> <tr> <td height="15" colspan="2"></td> </tr> </table></td> </tr><tr> <td height="22" align="center" background="/images/cpfl-2.jpg" class="z2"><strong><a href="/a/chanpinzhanshi/yidongtongxunceshiyibiao/" target="_self">¿UÕdŠ¨é€šè®¯‹¹‹è¯•ä»ªè¡¨</a></strong></td> </tr> <tr> <td align="center" background="/images/cpfl-3.jpg"> <table width="92%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10" colspan="2"></td> </tr> <tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/yidongtongxunceshiyibiao/tiankuixianceshiyi" target="_self">天馈¾U¿æµ‹è¯•äÈA</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/yidongtongxunceshiyibiao/shepingonglvji" target="_self">ž®„频功率è®?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/yidongtongxunceshiyibiao/pinpufenxiyi" target="_self">频谱分析ä»?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/yidongtongxunceshiyibiao/shepinxinhaofashengqi" target="_self">ž®„频信号发生å™?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/yidongtongxunceshiyibiao/shiliangwangluofenxiyi" target="_self">矢量¾|‘络分析ä»?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/yidongtongxunceshiyibiao/jizhanzongceyi" target="_self">基站¾l¼æµ‹ä»?/a></td> </tr> <tr> <td height="15" colspan="2"></td> </tr> </table></td> </tr><tr> <td height="22" align="center" background="/images/cpfl-2.jpg" class="z2"><strong><a href="/a/chanpinzhanshi/tongxunwangluoyouhuachanpin/" target="_self">通讯¾|‘络优化产品</a></strong></td> </tr> <tr> <td align="center" background="/images/cpfl-3.jpg"> <table width="92%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10" colspan="2"></td> </tr> <tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/tongxunwangluoyouhuachanpin/ceshiruanjian" target="_self">‹¹‹è¯•è½¯äšg</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/tongxunwangluoyouhuachanpin/ceshishouji" target="_self">‹¹‹è¯•æ‰‹æœº</a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/tongxunwangluoyouhuachanpin/xiangguanceshiyibiao" target="_self">相关‹¹‹è¯•ä»ªè¡¨</a></td> </tr> <tr> <td height="15" colspan="2"></td> </tr> </table></td> </tr><tr> <td height="22" align="center" background="/images/cpfl-2.jpg" class="z2"><strong><a href="/a/chanpinzhanshi/CATVzhuanyeceshiyibiao/" target="_self">CATV专业‹¹‹è¯•ä»ªè¡¨</a></strong></td> </tr> <tr> <td align="center" background="/images/cpfl-3.jpg"> <table width="92%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10" colspan="2"></td> </tr> <tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/CATVzhuanyeceshiyibiao/changqiangyi" target="_self">场强ä»?/a></td> </tr> <tr> <td height="15" colspan="2"></td> </tr> </table></td> </tr><tr> <td height="22" align="center" background="/images/cpfl-2.jpg" class="z2"><strong><a href="/a/chanpinzhanshi/xudianchiweihushebei/" target="_self">蓄电池维护设å¤?/a></strong></td> </tr> <tr> <td align="center" background="/images/cpfl-3.jpg"> <table width="92%" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="10" colspan="2"></td> </tr> <tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/xudianchiweihushebei/xudianchiweihuyibiao" target="_self">蓄电池维护äÈAè¡?/a></td> </tr><tr> <td width="0"> </td> <td align="left"><img src="/picture/cpfl-4.jpg" width="13" height="12" />  <a href="/a/chanpinzhanshi/xudianchiweihushebei/BCLTdianchizaixianchongfangdianshebei" target="_self">BCLT甉|± åœ¨çº¿å……放电设å¤?/a></td> </tr><tr> <td width="0"> </td> <td 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