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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å¦ä¸€ç«¯å°„出时åQŒå…‰çš„强度会å‡å¼±ã€‚è¿™æ„味ç€å…‰ä¿¡å·é€šè¿‡å…‰çº¤ä¼ æ’­åŽï¼Œå…‰èƒ½é‡è¡°å‡äº†ä¸€éƒ¨åˆ†ã€‚这说明光纤中有æŸäº›ç‰©è´¨æˆ–å› æŸç§åŽŸå› åQŒé˜»æŒ¡å…‰ä¿¡å·é€šè¿‡ã€‚è¿™ž®±æ˜¯å…‰çº¤çš„传输æŸè€—。åªæœ‰é™ä½Žå…‰¾U¤æŸè€—，æ‰èƒ½ä½¿å…‰ä¿¡å·ç•…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;">1ã€é€ æˆå…‰çº¤è¡°å‡çš„主è¦å› ç´ æœ‰</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å¾åQŒå¼¯æ›ÔŒ¼ŒæŒ¤åŽ‹åQŒæ‚质，ä¸å‡åŒ€å’Œå¯¹æŽ¥ç­‰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å¾åQšæ˜¯å…‰çº¤çš„固有æŸè€—，包括åQšç‘žåˆ©æ•£ž®„，固有å¸æ”¶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æŸå¤±æŽ‰åQŒé€ æˆæŸè€—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å°çš„弯曲而造æˆçš„æŸè€—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;">　　æ‚è´¨åQšå…‰¾U¤å†…æ‚è´¨å¸æ”¶å’Œæ•£ž®„在光纤中传播的光，造æˆçš„æŸå¤±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;">　　ä¸å‡åŒ€åQšå…‰¾U¤æ料的折射率ä¸å‡åŒ€é€ æˆçš„æŸè€—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„æŸè€—，如：ä¸åŒè½?å•æ¨¡å…‰çº¤åŒèáu度è¦æ±‚å°äº?.8μm)åQŒç«¯é¢ä¸Žè½´å¿ƒä¸åž‚ç›ß_¼Œç«¯é¢ä¸åã^åQŒå¯¹æŽ¥å¿ƒå¾„ä¸åŒšw…和熔接质é‡å·®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å¦ä¸€ç«¯å°„出时åQŒå…‰çš„强度会å‡å¼±ã€‚è¿™æ„味ç€å…‰ä¿¡å·é€šè¿‡å…‰çº¤ä¼ æ’­åŽï¼Œå…‰èƒ½é‡è¡°å‡äº†ä¸€éƒ¨åˆ†ã€‚这说明光纤中有æŸäº›ç‰©è´¨æˆ–å› æŸç§åŽŸå› åQŒé˜»æŒ¡å…‰ä¿¡å·é€šè¿‡ã€‚è¿™ž®±æ˜¯å…‰çº¤çš„传输æŸè€—。åªæœ‰é™ä½Žå…‰¾U¤æŸè€—，æ‰èƒ½ä½¿å…‰ä¿¡å·ç•…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;">　2ã€å…‰¾U¤æŸè€—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æŸè€—大致å¯åˆ†äؓ光纤å…ähœ‰çš„固有æŸè€—以åŠå…‰¾U¤åˆ¶æˆåŽç”׃‹É用æ¡ä»‰™€ æˆçš„附加æŸè€—。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æŸè€—å¯åˆ†äؓ固有æŸè€—和附加æŸè€—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æŸè€—包括散ž®„æŸè€—ã€å¸æ”¶æŸè€—和因光¾U¤ç»“æž„ä¸å®Œå–„引è“vçš„æŸè€—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æŸè€—则包括微弯æŸè€—ã€å¼¯æ›²æŸè€—和接箋æŸè€—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æŸè€—是在光¾U¤çš„é“ø™®¾˜q‡ç¨‹ä¸­äh为造æˆçš„。在实际应用中，ä¸å¯é¿å…地覞®†å…‰¾U¤ä¸€æ ÒŽŽ¥ä¸€æ ¹åœ°æŽ¥è“væ¥ï¼Œå…‰çº¤˜qžæŽ¥ä¼šäñ”生æŸè€—。光¾U¤å¾®ž®å¼¯æ›ŒÓ€æŒ¤åŽ‹ã€æ‹‰ä¼¸å—力也会引èµähŸè€—。这些都是光¾U¤ä‹É用æ¡ä»¶å¼•èµïLš„æŸè€—。究其主è¦åŽŸå› æ˜¯åœ¨è¿™äº›æ¡ä»¶ä¸‹åQŒå…‰¾U¤çº¤èŠ¯ä¸­çš„传输模å¼å‘生了å˜åŒ–。附加æŸè€—是å¯ä»¥ž®½é‡é¿å…的。下é¢ï¼Œæˆ‘们åªè®¨è®ºå…‰¾U¤çš„固有æŸè€—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æŸè€—中åQŒæ•£ž®„æŸè€—å’Œå¸æ”¶æŸè€—是由光¾U¤æ料本íw«çš„ç‰ÒŽ€§å†³å®šçš„åQŒåœ¨ä¸åŒçš„工作æ‡L长下引è“v的固有æŸè€—也ä¸åŒã€‚æžæ¸…楚产生æŸè€—的机ç†åQŒå®šé‡åœ°åˆ†æžå„ç§å› ç´ å¼•è“vçš„æŸè€—的大å°åQŒå¯¹äºŽç ”制低æŸè€—å…‰¾U¤ï¼Œåˆç†ä½¿ç”¨å…‰çº¤æœ‰ç€æžå…¶é‡è¦çš„æ„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;">　3ã€æ料的å¸æ”¶æŸè€?/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„æ料能够å¸æ”¶å…‰èƒ½ã€‚å…‰¾U¤æ料中的粒å­å¸æ”¶å…‰èƒ½ä»¥åŽï¼Œäº§ç”ŸæŒ¯åŠ¨ã€å‘热，而将能é‡æ•£å¤±æŽ‰ï¼Œ˜q™æ ·ž®×ƒñ”生了å¸æ”¶æŸè€—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é“åQŒç‰©è´¨æ˜¯ç”±åŽŸå­ã€åˆ†å­æž„æˆçš„åQŒè€ŒåŽŸå­åˆç”±åŽŸå­æ ¸å’Œæ ¸å¤–电å­ç»„æˆï¼Œç”µå­ä»¥ä¸€å®šçš„轨é“围绕原å­æ ¸æ—‹è½¬ã€‚è¿™ž®±åƒæˆ‘们生活的地çƒä»¥åŠé‡‘星ã€ç«æ˜Ÿç­‰è¡Œæ˜Ÿéƒ½å›´¾l•å¤ªé˜Ïx—‹è½¬ä¸€æ øP¼Œæ¯ä¸€ä¸ªç”µå­éƒ½å…ähœ‰ä¸€å®šçš„能é‡åQŒå¤„在æŸä¸€è½¨é“上，或者说æ¯ä¸€è½¨é“都有一个确定的能çñ”。è·åŽŸå­æ ¸è¿‘的轨é“能¾U§è¾ƒä½Žï¼Œè·åŽŸå­æ ¸­‘Šè¿œçš„轨é“能¾U§è¶Šé«˜ã€‚轨é“之间的˜q™ç§èƒ½çñ”差别的大ž®å°±å«èƒ½¾U§å·®ã€‚当电å­ä»Žä½Žèƒ½çñ”å‘高能çñ”è·ƒè¿æ—Óž¼Œž®Þp¦å¸æ”¶ç›¸åº”¾U§åˆ«çš„能¾U§å·®çš„能é‡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“æŸä¸€èƒ½çñ”的电å­å—åˆîC¸Žè¯¥èƒ½¾U§å·®ç›¸å¯¹åº”的波长的光照射æ—Óž¼Œåˆ™ä½äºŽä½Žèƒ½çñ”轨é“上的电孞®†è·ƒ˜q到能çñ”高的轨é“上。这一电å­å¸æ”¶äº†å…‰èƒ½ï¼Œž®×ƒñ”生了光的å¸æ”¶æŸè€—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æ料二氧化硅(SiO2)本èínž®±å¸æ”¶å…‰åQŒä¸€ä¸ªå«ç´«å¤–å¸æ”¶åQŒå¦å¤–一个嫾U¢å¤–å¸æ”¶ã€‚ç›®å‰å…‰¾U¤é€šä¿¡ä¸€èˆ¬ä»…工作åœ?.8ï½?.6μm波长区，因此我们åªè®¨è®ø™¿™ä¸€å·¥ä½œåŒºçš„æŸè€—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”µå­è·ƒ˜qäñ”生的å¸æ”¶å³°åœ¨ç´«å¤–区的0.1ï½?.2μm波长左å³ã€‚éšç€æ³¢é•¿å¢žå¤§åQŒå…¶å¸æ”¶ä½œç”¨é€æ¸å‡å°åQŒä½†å½±å“区域很宽åQŒç›´åˆ?μm以上的æ‡Lé•Ñ€‚丘q‡ï¼Œç´«å¤–å¸æ”¶å¯¹åœ¨¾U¢å¤–区工作的矌™‹±å…‰çº¤çš„媄å“ä¸å¤§ã€‚例如，åœ?.6μm波长的å¯è§å…‰åŒºï¼Œç´«å¤–å¸æ”¶å¯è¾¾1dB/kmåQŒåœ¨0.8μm波长旉™™åˆ?.2ï½?.3dB/kmåQŒè€Œåœ¨1.2μm波长æ—Óž¼Œå¤§çº¦åªæœ‰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å¸æ”¶æŸè€—是ç”Þqº¢å¤–区æ料的分å­æŒ¯åŠ¨äñ”生的。在2μm以上波段有几个振动å¸æ”¶å³°ã€‚由于å—光纤中儿U掺æ‚元素的影å“åQŒçŸ³è‹±å…‰¾U¤åœ¨2μm以上的æ‡LŒDµä¸å¯èƒ½å‡ºçŽ°ä½ŽæŸè€—窗å£ï¼Œåœ?.85μm波长的ç†è®ºæžé™æŸè€—äØ“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;">　　通过研究åQŒè¿˜å‘现矌™‹±çŽÈ’ƒä¸­æœ‰ä¸€äº?quot;ç ´å分å­"在æ£ä¹±ï¼Œä¸»è¦æ˜¯ä¸€äº›æœ‰å®Œ™¿‡æ¸¡é‡‘属æ‚质，如铜ã€é“ã€é“¬ã€é”°½{‰ã€‚è¿™äº?quot;å蛋"在光照射下，贪婪地å¸æ”¶å…‰èƒ½ï¼Œä¹Þp¹¦ä¹ÞpŸ©åQŒé€ æˆäº†å…‰èƒ½çš„æŸå¤±ã€‚清é™?quot;æ£äؕ分å­"åQŒå¯¹åˆ‰™€ å…‰¾U¤çš„ææ–™˜q›è¡Œæ ¼çš„化学æ纯åQŒå°±å¯ä»¥å¤§å¤§é™ä½ŽæŸè€—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„å¦ä¸€ä¸ªå¸æ”¶æºæ˜¯æ°¢æ°§æ ¹(OHˉ)期的研究åQŒäh们å‘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å¸æ”¶æŸè€—最ä¸ÞZ¸¥é‡ï¼Œå¯¹å…‰¾U¤çš„å½±å“也最大。在1.38μm波长åQŒå«é‡ä»…å?.0001的氢氧根产生的å¸æ”¶å³°æŸè€—就高达33dB/km.</span></p> <p style="margin: 10px 0px; padding: 0px; font-size: 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word-wrap: break-word !important;">4ã€æ•£ž®„æŸè€?/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{’命IÞZ¸­ç…§å°„åQŒå¯ä»¥çœ‹åˆîC¸€æŸå…‰æŸ±ã€‚äh们也曄¡œ‹åˆ°è¿‡å¤œç©ºä¸­æŽ¢ç…§ç¯å‘出¾_—大光柱。那么，ä¸ÞZ»€ä¹ˆæˆ‘们会看觘q™äº›å…‰æŸ±å‘?˜q™æ˜¯å› äؓ有许多烟雾ã€ç°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°„å‘了四é¢å…«æ–¹ã€‚这个现象是ç”Þq‘žåˆ©æœ€å…ˆå‘现的åQŒæ‰€ä»¥äh们把˜q™ç§æ•£å°„命åä¸?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?原楾l„æˆç‰©è´¨çš„分å­ã€åŽŸå­ã€ç”µå­ç­‰å¾®å°¾_’å­æ˜¯ä»¥æŸäº›å›ºæœ‰é¢‘率˜q›è¡ŒæŒ¯åŠ¨çš„，òq¶èƒ½é‡Šæ”¾å‡ºæ‡L长与该振动频率相应的光。粒å­çš„振动频率ç”Þq²’å­çš„大å°æ¥å†³å®šã€‚ç²’å­è¶Šå¤§ï¼ŒæŒ¯åŠ¨é¢‘率­‘Šä½ŽåQŒé‡Šæ”‘Ö‡ºçš„光的æ‡L长越é•?¾_’å­­‘Šå°åQŒæŒ¯åŠ¨é¢‘率越高，释放出的光的波长­‘ŠçŸ­ã€‚è¿™¿U振动频率称åšç²’å­çš„固有振动频率。但是这¿U振动åƈä¸æ˜¯è‡ªè¡Œäº§ç”ŸåQŒå®ƒéœ€è¦ä¸€å®šçš„能é‡ã€‚一旦粒å­å—到具有一定æ‡L长的光照ž®„，而照ž®„光的频率与该粒å­å›ºæœ‰æŒ¯åŠ¨é¢‘率相åŒï¼Œž®×ƒ¼šå¼•è“v共振。粒å­å†…的电å­ä¾¿ä»¥è¯¥æŒ¯åŠ¨é¢‘率开始振动，¾l“果是该¾_’å­å‘å››é¢å…«æ–ÒŽ•£ž®„出光，入射光的能é‡è¢«å¸æ”¶è€Œè{化äØ“¾_’å­çš„能é‡ï¼Œ¾_’å­åˆå°†èƒ½é‡é‡æ–°ä»¥å…‰èƒ½çš„形弞®„出厅R€‚因此，对于在外部观察的人æ¥è¯ß_¼Œçœ‹åˆ°çš„好åƒæ˜¯å…‰æ’žåˆ°ç²’å­ä»¥åŽï¼Œå‘å››é¢å…«æ–šw£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æŸè€—å°±¿UîCؓ瑞利散射æŸè€—。鉴于目å‰çš„光纤刉™€ å·¥è‰ºæ°´òq»I¼Œå¯ä»¥è¯´ç‘žåˆ©æ•£ž®„æŸè€—是无法é¿å…的。但是，ç”׃ºŽç‘žåˆ©æ•£å°„æŸè€—的大å°ä¸Žå…‰æ³¢é•¿çš?‹Æ¡æ–¹æˆå比，所以光¾U¤å·¥ä½œåœ¨é•¿æ‡L长区æ—Óž¼Œç‘žåˆ©æ•£å°„æŸè€—çš„å½±å“å¯ä»¥å¤§å¤§å‡å°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;">5ã€å…ˆå¤©ä¸­‘»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“æž„ä¸å®Œå–„，如由光纤中有气æˆöã€æ‚质，或者粗¾l†ä¸å‡åŒ€åQŒç‰¹åˆ«æ˜¯èŠ?包层交界é¢ä¸òqÏx»‘½{‰ï¼Œå…‰çº¿ä¼ åˆ°˜q™äº›åœ°æ–¹æ—Óž¼Œž®×ƒ¼šæœ‰ä¸€éƒ¨åˆ†å…‰æ•£ž®„到å„个方å‘åQŒé€ æˆæŸè€—。这¿UæŸè€—是å¯ä»¥æƒ›_Šžæ³•å…‹æœçš„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®„å‘å››é¢å…«æ–¹åQŒå…¶ä¸­æœ‰ä¸€éƒ¨åˆ†æ•£å°„光沿ç€ä¸Žå…‰¾U¤ä¼ æ’­ç›¸åçš„æ–¹å‘å射回æ¥åQŒåœ¨å…‰çº¤çš„å…¥ž®„端å¯æŽ¥æ”¶åˆ°˜q™éƒ¨åˆ†æ•£ž®„光。光的散ž®„ä‹É得一部分光能å—到æŸå¤±åQŒè¿™æ˜¯äh们所ä¸å¸Œæœ›çš„。但是，˜q™ç§çŽ°è±¡ä¹Ÿå¯ä»¥äؓ我们所利用åQŒå› ä¸ºå¦‚果我们在å‘é€ç«¯å¯ÒŽŽ¥æ”¶åˆ°çš„这部分光的强弱˜q›è¡Œåˆ†æžåQŒå¯ä»¥æ£€æŸ¥å‡º˜q™æ ¹å…‰çº¤çš„æ–­ç‚V€ç¼ºé™·å’ŒæŸè€—大ž®ã€‚è¿™æ øP¼Œé€šè¿‡äººçš„èªæ˜Žæ‰æ™ºåQŒå°±æŠŠå事å˜æˆäº†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—å£</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="æœçƒ¦" /> </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 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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é…件åŠè€—æ</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åŠå…‰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/guangxianrongjieshebeijipeijian/baopianguangqianrongjieji" target="_self">ä¿å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">光时域垮„äÈAåŠé…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">光时域垮„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å—å¼OTDR</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 href="/a/chanpinzhanshi/guangshiyufansheyijipeijian/OTDRpeijian" target="_self">OTDRé…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/guangshiyufansheyijipeijian/PONguangshiyufansheyi" target="_self">PON光时域垮„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/guangtongxunzhuanyeceshiyibiao/" target="_self">光通讯专业‹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/guangtongxunzhuanyeceshiyibiao/keshiguangyuan_hongguangyuan_" target="_self">å¯è§†å…‰æºåQˆçº¢å…‰æºåQ?/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/guanggonglvji" target="_self">光功率计</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/PONgonglvji" target="_self">PON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/guangtongxunzhuanyeceshiyibiao/wendingjiguangguangyuan" target="_self">½E›_®š‹È€å…‰å…‰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/gu/guanghuaji" target="_self">å…‰è¯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/guangtongxunzhuanyeceshiyibiao/guangxianjiachiqian" target="_self">光纤å¤ÒŽŒé’?/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">å¯è°ƒå…‰è¡°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/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»¼åˆæµ‹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åŠå‘Šè­¦ç³»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¾pÈ»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å¼é«˜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">å…‰èµ\自动切æ¢ä¿æŠ¤¾pÈ»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åŠæ•°æ®æµ‹è¯•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">误砋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æžä»?/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">PMDå振模色散分æžäÈA</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åŠç»´æŠ¤å·¥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æ´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/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æžä»?/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å·å‘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">矢釾|‘络分æžä»?/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/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> 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