寮曡█
鍏夌簴Bragg鍏夋煹锛團BG锛夊偝鎰熷櫒鏄互FBG浣滅偤鏁忔劅鍏冧欢鐨勫姛鑳藉瀷鍏夌簴鍌虫劅鍣�锛屾湁寤f硾鐨勬噳鐢ㄩ牁鍩熴€傜暥瑭插偝鎰熷櫒鍙楁韩搴�銆佹噳璁婄瓑澶栫晫鍙冮噺鐨勪綔鐢ㄦ檪锛孊ragg娉㈤暦鏈冪櫦(f膩)鐢熺浉鎳夌殑婕傜Щ锛屽洜姝�锛岀爺绌禙BG鍌虫劅鍣ㄧ殑闂滈嵉鍟忛鏄浣曠簿纰烘脯閲廎BG鍙嶅皠娉㈤暦婕傜Щ閲�銆傚偝绲�(t菕ng)涓婁竴鑸噳鐢ㄥ厜璀滃剙瑙h绯荤当(t菕ng)锛屽畠楂旂⿳澶с€佷笉鏄撴敎甯�銆佷笉鍒╀簬鐝�(xi脿n)鍫翠娇鐢�銆傝繎骞翠締鍑虹従(xi脿n)鐨勫井鍨嬪厜璀滃剙楂旂⿳灏�銆佸児鏍间究瀹�锛屼絾鍏跺厜璀滃垎杈ㄥ姏鍙湪0.1nm鏁�(sh霉)閲忕礆锛岄仩閬犻仈涓嶅埌FBG瑙h闇€瑕佺殑pm绱氱殑鍒嗚鲸鍔�銆�
鐐轰簡鎻愰珮Bragg娉㈤暦婕傜Щ閲忕殑娓噺绮惧害锛屾彁鍑轰簡鍩轰簬F-P鍙璜ф烤娉㈠櫒鍜屾尝闀峰熀婧栧櫒锛岄噰鐢ㄦ彃鍊�-鐩搁棞璀滄硶鐨勮檿鐞嗘妧琛�锛屽嵆锛岄鍏堝湪鍘熷鍏夎瓬涓瘡鐩搁劙鍏╅粸闁撶窔鎬ф彃鍏ヤ竴浜涢粸锛屽啀鍒╃敤鐩搁棞璀滄硶寰楀埌Bragg娉㈤暦婕傜Щ閲�銆傝┎鏂规硶涓嶄絾鍙互鏈夋晥鎶戝埗鍣伈锛岃€屼笖锛岃兘绮剧⒑鍦版脯閲廈ragg娉㈤暦婕傜Щ閲�锛屽緸鑰屽鐝�(xi脿n)楂樼簿搴﹀湴娓噺婧害銆佹噳璁婄瓑澶栫晫鍙冮噺銆�
1銆丗BG鍌虫劅鍣ㄥ師鐞�
鏍规摎(j霉)Bragg琛嶅皠鍘熺悊锛岀暥瀵付鍏夋簮鐧�(f膩)鍑虹殑鍏夊叆灏勫埌FBG涓幓锛孎(xi脿n)BG灏囨妸浠ragg娉㈤暦鐐轰腑蹇冪殑绐勫付鍏夎瓬鑼冨湇鍏х殑鍏夊弽灏勫洖渚�銆侭ragg娉㈤暦位B鐢盕BG鐨勬煹璺滱鍜屾湁鏁堟姌灏勭巼neff姹哄畾锛�
鍥犳锛孎(xi脿n)BG鍙互琚湅浣滅獎甯舵烤娉㈠櫒锛屾烤娉㈠櫒鐨勪腑蹇冩尝闀峰氨鏄疊ragg娉㈤暦銆傜暥FBG鍙楀埌鎳夎畩銆佹韩搴︾瓑鍥犵礌浣縁BG鐨勬煹璺濅互鎴栨湁鏁堟姌灏勭巼neff鐢㈢敓璁婂寲鏅傦紝琚獸BG鍙嶅皠鐨凚ragg娉㈤暦位B浜︾敘鐢熺浉鎳夎畩鍖栥€傜敱寮忥紙1锛夌殑寰垎寰楃煡锛屽叾Bragg娉㈤暦鐨勫亸绉婚噺鐐猴細
寰炶€屽鐝�(xi脿n)浜嗗緟娓噺灏嶅弽灏勪俊铏熷厜鐨勬尝闀风法纰艰鍒躲€傚洜姝�锛岄€氶亷瀵︽檪鐩�(ji膩n)娓弽灏勬尝闀风殑鍋忕Щ閲�锛屽啀鏍规摎(j霉)鈻硁ff锛屸柍螞鑸囧緟娓噺涔嬮枔鐨勭窔鎬ч棞绯�锛屽嵆鍙嵅寰楀緟娓墿鐞嗛噺鐨勮畩鍖�銆�
2銆佹彃鍊�-鐩搁棞璀滄硶鍘熺悊
鐩搁棞璀滄硶鍩轰簬浠ヤ笅鐗瑰緛锛氬湪寰堝FBG鍌虫劅绯荤当(t菕ng)涓�锛孎(xi脿n)BG鍏夎瓬鍙湁鍏夊姛鐜囩殑璧蜂紡浠ュ強鍏夎瓬鐨勭附楂旀紓绉�锛屽厜璀滅殑褰㈢媭绺芥槸淇濇寔涓嶈畩锛岄浼间簬楂樻柉鍒嗗竷銆傞€欏€嬬壒鎬ч爯绀鸿憲涓€绋彲鑳芥€э紝鍗矪ragg娉㈤暦鐨勬紓绉诲彲浠ラ€氶亷姣旇純鍘熷闋昏瓬鍜屾紓绉诲悗闋昏瓬鐨勭浉浼兼€т締鐛插緱銆傞€欑ó鐩镐技鎬у彲浠ョ敤浜掔浉闂滃嚱鏁�(sh霉)渚嗚〃绀�銆備互涓嬪厛绲﹀嚭闋昏瓬鐩搁棞娉曠殑鐞嗚珫鍒嗘瀽銆�
鏍规摎(j霉)鏁�(sh霉)瀛椾俊铏熻檿鐞嗙殑鐞嗚珫锛岃ō2鍊嬪厜璀滅稉(j墨ng)鍏夐浕杞夋彌閲囨ǎ鍚庡垎鍒ョ偤X锛坕锛夊拰Y锛坕锛夛紙i=1锛�2锛�3锛屸€�锛孨锛岃〃绀烘尝闀凤級锛屼簩鑰呬簰鐩搁棞閬嬬畻瀹氱京鐐猴細
寮忎腑j鐐哄姞鍦▁涓婄殑娉㈤暦婕傜Щ銆傛尝闀蜂笅妯欒秴鍑鸿寖鍦峓1锛孨]鐨勯牷璀滆鐐洪浂銆傛牴鎿�(j霉)浜掔浉闂滅殑鎬ц唱锛孯锛坖锛夊湪x锛坕-j锛夊拰Y锛坕锛夐噸鐤婂緱鏈€澶�锛屾渶鐩镐技鐨勬檪鍊欏緱鍒版渶澶у€�銆傚洜鐐烘瘡鍊婩BG鍙嶅皠鍥炰締鐨勫厜璀滈兘椤炰技浜庨珮鏂垎甯冿紝鎵€浠�锛屽彧瑕佸厛閲囬泦涓€鍊嬪熀婧栬瓬锛岀劧鍚庯紝鑸囧娓瓬閫茶浜掔浉闂滈亱绠�锛屾眰寰椾簰鐩搁棞鍊兼渶澶ф檪鎵€灏嶆噳鐨刯鍊�锛屽氨鍙互寰楀埌瀵︽脯璀滅殑婕傜Щ锛屼篃灏卞緱鍒颁簡Bragg娉㈤暦鐨勬紓绉�銆�
鍙閲囩敤鐩搁棞璀滄硶鏄彲琛岀殑锛屼笖閲嶈鐨勬槸姝ゆ柟娉曡垏鍌崇当(t菕ng)鐨勫嘲鍊兼娓硶鐩告瘮锛屽叿鏈夐珮绮惧害鐨勭壒榛�銆傚嘲鍊兼娓硶鏄▓绠楀師濮嬪弽灏勮瓬涓殑鏈€澶у€硷紝鑰岄牷璀滅浉闂滄硶鍓囨槸閫氶亷鐩搁棞瑷堢畻锛屾敼鐐鸿▓绠椾竴绯诲垪灏嶆噳涓嶅悓婕傜Щ鍊肩殑鐩搁棞鍊间腑鐨勬渶澶у€�銆傝▓绠楁瘡鍊嬬浉闂滃€兼檪閮藉皪瑷卞鍏夎瓬鍊煎仛浜嗙浉鍔犻亱绠楋紝閫欐渻鎸夌浉鍔犳暩(sh霉)N鐨勫钩鏂规牴鐨勮(gu墨)寰嬫湁鏁堟姂鍒跺闅涘師濮嬪厜璀滀腑鐨勫櫔鑱�锛屽緸鑰屾彁楂樻尝闀锋脯閲忕簿搴�銆傜敱浠ヤ笅鎺ㄥ皫鍙互鐪嬪嚭锛�
鍦ㄥ垎鏋愬墠锛屽亣瑷璶1鍜宯2鏄浉浜掔崹绔嬬殑鍣伈锛屽畠鍊戦兘鏈嶅緸楂樻柉鍒嗗竷銆傚畾缇╀俊鍣瘮SNR鐐轰俊铏熺殑鍧囨柟鏍归櫎浠ュ櫔鑱茬殑鍧囨柟鏍�锛岃ō鍘熶俊铏焁n锛坕锛�锛孻n锛坖锛�锛岀殑淇″櫔姣斿潎鐐篠NR0锛屾牴鎿�(j霉)楂樻柉鍒嗗竷鐨勭崹绔嬫€�锛屽紡锛�6锛夌殑淇″櫔姣旂偤锛�
鐢变笂寮忓彲瑕�锛岄毃钁桸鐨勪笉鏂峰鍔�锛岀浉灏嶄簬鍘熶俊铏熶俊鍣瘮渚嗚锛岀稉(j墨ng)閬庣浉闂滆瓬娉曞悗鐨勪俊鍣瘮鍦ㄤ笉鏂峰鍔狅紙鐞嗚珫涓婃槸閫欐ǎ锛屽闅涗腑鍚庨潰瀵﹂瑾槑锛夛紝鎵€浠�锛屽師濮嬪厜璀滀腑鐨勫櫔鑱插紩璧风殑娓噺瑾ゅ樊灏卞彲浠ヨ鎶戝埗銆�
鐐轰簡闄嶄綆绯荤当(t菕ng)纭欢瀵︾従(xi脿n)闆e害锛屼繚璀夎В瑾块€熷害锛屼娇娉㈤暦娓噺绮惧害閫蹭竴姝ユ彁楂�锛屾湰鏂囬倓绲愬悎浜嗙窔鎬ф彃鍊肩殑鏂规硶锛屾暣鍊嬬殑宸ヤ綔閬庣▼灏辨槸鍏堝湪鍘熷鐨勫厜璀滀腑姣忕浉閯板叐榛炲晱绶氭€ф彃鍏ヤ竴浜涢粸锛屽啀鍒╃敤鐩搁棞璀滄硶寰楀埌Bragg娉㈤暦婕傜Щ銆傞噰鐢ㄧ窔鎬ф彃鍊肩殑鐩殑灏辨槸鐐轰簡浣垮師濮嬪厜璀滄洿鍔犵浉浼间簬婕傜Щ鍚庣殑鍏夎瓬锛屽緸鑰屽湪鐩搁棞璀滄硶涓洿鑳界簿纰哄湴纰哄畾娉㈤暦婕傜Щ閲�銆�
[b]3銆佸椹楃祼鏋�
[/b]
瑙h绯荤当(t菕ng)瑁濈疆濡傚湒1锛岄噰鐢ㄤ腑蹇冩尝闀风偤1 550 nm鐨勭櫦(f膩)鍏変簩妤电锛圠ED锛�锛岃瓬瀵偤30 nm锛孡ED鐧�(f膩)鍑虹殑鍏夌稉(j墨ng)閬�3 dB鑰﹀悎鍣ㄥ悗閫插叆FBG锛孎(xi脿n)BG鍙嶅皠鍥炵殑鍏夊啀娆$稉(j墨ng)閬庨€欏€�3 dB鑰﹀悎鍣ㄥ悗閫插叆F-P鍙璜ф烤娉㈠櫒锛團OOL2涓婂瀷锛夛紝鍐嶇稉(j墨ng)鍏夐浕杞夋彌銆佹斁澶�銆丏/A杞夋彌鍣ㄩ€插叆鏁�(sh霉)瀛椾俊铏熻檿鐞嗗櫒锛圖SP锛夊鐝�(xi脿n)鎻掑€�-鐩搁棞璀滄硶瑙h锛團BG0鏄浐瀹氭尝闀风殑鍙冭€僃BG锛岄€欏€嬫尝闀峰熀婧栧櫒鍙互娑堥櫎鍙璜-P婵炬尝鍣ㄨ厰闀锋紓绉诲皪娓噺绮惧害鐨勫奖闊匡級銆�
3.1 鎻掑€�-鐩搁棞璀滄硶鑸囧嘲鍊兼硶姣旇純瀵﹂
灏岶BG1鍜孎BG2鐨勫弽灏勮瓬閫g簩(x霉)娓噺10娆�锛孎(xi脿n)BG1鍜孎BG2鑷敱鏀剧疆锛屾韩搴︿繚鎸佷笉璁�锛屾墍浠�锛岀悊璜栦笂鍚勬鐨勭祼鏋滄噳瑭茬浉鍚岋紝浣嗗闅涗腑瀛樺湪寰皬鐨勫樊鐣�銆傚湒2鏄湪1 552锝�1 557nm鑼冨湇鍏�锛岄噰妯�800榛�锛孎(xi脿n)BG2鍦�3绋笉鍚屾儏娉佷笅鐨勬脯閲忓€硷紙FBG1鑸嘑BG2椤炰技锛�
鍦�2涓�锛宎鏄敤鍌崇当(t菕ng)鐨勭洿鎺ユ眰宄板€肩殑鏂规硶锛屽叾妯欐簴宸偤0.042 41 nm ;b鏄湪娌掓彃鍊肩殑鎯呮硜涓嬬敤鐩搁棞璀滄硶锛屽叾妯欐簴宸偤0 nm;c鏄噰鐢ㄦ彃鍊�-璀滅浉闂滄硶锛堟瘡鐩搁劙榛為枔绶氭€ф彃鍊�8榛烇級锛屽叾妯欐簴宸偤0.002 14 nm銆傝〃闈㈢湅涓婂幓锛屽ソ鍍廱鏈€濂�锛屼絾瀹冨闅涗笂鏄敱浜庢瘡鐩搁劙榛炰箣闁撶殑闁撻殧澶ぇ锛屼互鑷充簬鐣禕ragg娉㈤暦鍦ㄦ渶灏忕殑鍗€(q奴)闁撴檪锛屽氨涓嶈兘娓呮鐨勫垎闁嬪畠鍊�锛屾渶绲�锛屽皣瀹冨€戠湅浣滃悓涓€鍊嬪€�銆傚厛鎻掑叆涓€瀹氱殑鏁�(sh霉)鎿�(j霉)锛屾彁楂樺垎杈ㄥ姏鍚庡氨浣垮緱鍘熷鍏夎瓬鏇村姞鐩镐技浜庢紓绉诲悗鐨勫厜璀滐紝鍐嶉亱鐢ㄧ浉闂滆瓬娉�锛屽氨鍙互鐛插緱鏈€浣崇殑鏁堟灉銆�
鐐轰簡鐮旂┒鎻掑€�-鐩搁棞璀滄硶涓紝鍦ㄤ竴瀹氱殑姊濅欢涓�锛屾渶濂芥彃鍏ュ灏戦粸娉㈤暦鍒嗚鲸鍔涙渶楂樼殑鍟忛锛屽湪涓婇潰鐨勫椹楃郴绲�(t菕ng)涓�锛屽皣姣忕浉閯伴粸涔嬮枔鐨勬彃鍊奸粸鏁�(sh霉)寰�2澧炲姞鍒�17锛屽緱鍒板琛�1銆�
寰炶〃1鍙互鐪嬪嚭锛氬闅涗腑閲囩敤鎻掑€�-鐩搁棞璀滄硶娓噺Bragg娉㈤暦婕傜Щ锛屽叾娉㈤暦鍒嗚鲸鍔涗笉鏄毃钁楁彃鍊奸粸鐨勫鍔犺€屼笉鏂峰ぇ骞呭害澧炲姞銆傛湰绯荤当(t菕ng)鐣剁浉閯板叐榛炴彃鍊奸粸澧炲姞鍒�12榛炴檪锛屽垎杈ㄥ姏鍙仈鍒�1 pm锛屽绻肩簩(x霉)澧炲姞锛屽皣鐒℃硶閫蹭竴姝ユ敼鍠�銆�
3.2 婧害鍌虫劅瀵﹂
姣忔浠�10鈩冪殑姝ラ暦閫愭灏岶BG閫茶鍔犳韩锛屾彃鍊�-鐩搁棞璀滄硶娓緱Bragg娉㈤暦璁婂寲鍜屾韩搴︿箣闁撶殑闂滅郴濡傚湒3銆�
寰炲湒3涓彲寰楀埌娓噺绲愭灉鍜岀窔鎬ф摤鍚堜箣闁撶殑瑾ゅ樊锛堝潎鏂规牴瑾ゅ樊锛夌偤1.18pm銆�
4銆佺祼璜�
閫氶亷鐞嗚珫鍒嗘瀽鍜屽椹楄〃鏄庯細閲囩敤鐩搁棞璀滄硶娓噺Bragg娉㈤暦婕傜Щ閲忔槸鍙鐨�锛屽悓鏅�锛屽彲浠ユ彁楂樹俊鍣瘮锛岄€茶€屾彁楂樿В瑾跨簿搴�銆傚湪姝ゅ熀绀庝笂锛岀祼鍚堢窔鎬ф彃鍊肩殑鏂规硶锛屽湪鍘熷鍏夎瓬涓瘡鐩搁劙鍏╅粸闁撴彃鍏ヤ竴瀹氭暩(sh霉)閲忕殑榛�锛屽彲浠ラ€蹭竴姝ユ彁楂樿В瑾跨簿搴�銆傞噰鐢ㄦ彃鍊间竴鐩搁棞璀滄硶鍙娇Bragg鍏夋煹娉㈤暦鍒嗚鲸鍔涢仈鍒�1 pm锛屾韩搴︽脯閲忕簿搴﹂仈鍒奥�0.2鈩冦€�