鍏夋ā鍧楃殑閲嶈鍙傛暟
2012-10-31 10:19:49 鏂囧瓧锛氥€?a href="javascript:fontzoom(16)">澶?/a>銆戙€?a href="javascript:fontzoom(14)">涓?/a>銆戙€?a href="javascript:fontzoom(12)">灏?/a>銆?/div>
鎽樿锛?/span>鍚勭灏佽鐨勫厜妯″潡锛涘sfp,gbic,xfp,sfp 绛夊厜妯″潡閮藉瓨鍦ㄤ竴浜涘弬鏁伴渶瑕佺壒鍒敞鎰忋€傛湰鏂囧皢璇︾粏浠嬬粛杩欎簺鍙傛暟鐨勫惈涔夈€?/div>
鍙戝皠鍏夊姛鐜囨寚鍙戝皠绔殑鍏夊己銆?/div>
骞冲潎鍙戦€佸厜鍔熺巼(txlop:optical average power) 骞冲潎鍙戦€佸厜鍔熺巼鎸囦俊鍙烽€昏緫涓?鏃剁殑鍏夊姛鐜囦笌涓?鏃剁殑鍏夊姛鐜囩殑绠楁湳骞冲潎鍊? p0 p1 pavg = 2(dbm)
娑堝厜姣?er:extinctiratio) 淇″彿閫昏緫涓?鏃剁殑鍏夊姛鐜囦笌涓?鏃剁殑鍏夊姛鐜囩殑澶у皬涔嬫瘮.鍏惰绠楀叕寮忎负: p1er=10log p0 (db) er琛ㄧず娑堝厜姣?鍗曚綅涓篸b,p1鍜孭0鍒嗗埆琛ㄧず閫昏緫1鍙?鏃剁殑鍏夊姛鐜?
鎺ユ敹鐏垫晱搴︽寚鍙互鎺㈡祴鍒扮殑鍏夊己搴︺€?/div>
鎺ユ敹鐏垫晱搴?receiver sensitivity) 琛￠噺鎺ユ敹绔负淇濊瘉涓€瀹氳鐮佺巼(1脳10exp(-12))鎵€闇€鎺ユ敹鐨勬渶灏忓钩鍧囧厜鍔熺巼,鍗曚綅涓?dbm.
璇爜鐜囨槸鎸囧湪杈冮暱涓€娈垫椂闂村唴,缁忚繃鎺ユ敹绔殑鍏夌數杞崲鍚庢敹鍒扮殑璇爜鐮佸厓鏁颁笌璇爜浠緭鍑虹缁欏嚭鐮佸厓鏁扮殑姣旂巼.
淇″彿涓㈠け鎸囩ず(los assert)鍜屼俊鍙蜂涪澶辨仮澶嶆寚绀?los dessert) 鎺ユ敹鍣ㄨ緭鍑轰竴涓數淇″彿,鍏剁數浣嶉珮浣庡弽鏄犲嚭鎺ユ敹鍣ㄦ墍鎺ユ敹鐨勫厜淇″彿寮哄害鏄惁瓒冲,灏嗚鐢典綅涓庨璁剧數浣嶆瘮杈冧互鍒ゅ畾鍏変俊鍙锋槸鍚︿涪澶?鐢典綅姣旇緝鏄噰鐢ㄥ叿鏈変竴瀹氬洖婊炴晥搴旂殑姣旇緝鍣ㄥ疄鐜?閫氬父鐢ㄩ璁剧數淇″彿瀵瑰簲鐨勫厜鍔熺巼浣滀负鎸囩ず,鍗曚綅涓篸bm
鐪煎浘妯℃澘瀹归檺(emm:eye mask margin) 鐪煎浘寮€鍚害,鎸囧湪鏈€浣虫娊鏍风偣澶勭溂鍥惧箙搴?寮犲紑"鐨勭▼搴?鏃犵暩鍙樼溂鍥剧殑寮€鍚害搴斾负100[%]. 鐪煎浘妯℃澘瀹归檺鏄寚鐪煎浘妯℃澘鎵╁紶,鐩村埌鏈夌溂鍥剧殑閲囨牱鐐硅繘鍏ュ埌鎵╁紶鍖哄煙鐨勬ā鏉挎渶澶ф墿寮犵櫨鍒嗘瘮
鍏夋ā鍧?/b>鍙紶杈撶殑璺濈涓昏鍙楀埌鎹熻€楀拰鑹叉暎涓ゆ柟闈㈠彈闄愩€?/div>
鎹熻€楅檺鍒跺彲浠ユ牴鎹叕寮忥細鎹熻€楀彈闄愯窛绂伙紳锛堝彂灏勫厜鍔熺巼锛嶆帴鏀剁伒鏁忓害锛?鍏夌氦琛板噺閲忔潵浼扮畻銆?/div>
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