Menene "zoben zare mai zagaye"? Nawa ka sani game da shi?
Ma'ana: Zoben zare mai gani wanda haske zai iya zagayawa sau da yawa ta cikinsa
Zoben zare mai zagaye wani abu nena'urar fiber opticwanda haske zai iya zagayawa sau da yawa. Ana amfani da shi galibi a cikin tsarin sadarwa na fiber optic mai nisa. Ko da tare da iyakataccen tsawonZaren gani, ana iya watsa hasken sigina a cikin dogon nisa ta hanyar lanƙwasawa sau da yawa. Wannan yana taimakawa wajen nazarin illolin cutarwa da rashin daidaituwar gani da ke shafar ingancin hasken siginar.
A cikin fasahar laser, ana iya amfani da madaukai na zare masu zagaye don auna faɗin layi nalaser, musamman idan faɗin layin ya yi ƙanƙanta sosai (<1kHz). Wannan faɗaɗa ne na hanyar auna faɗin layin kai-heterodyne, wanda ba ya buƙatar ƙarin laser na tunani don samun siginar tunani daga kansa, wanda ke buƙatar amfani da dogayen zaruruwa na yanayi ɗaya. Matsalar da ke tattare da fasahar gano kai-heterodyne ita ce jinkirin lokacin da ake buƙata yana daidai da na faɗin layin, don haka faɗin layin ya kasance kaɗan kHz, har ma ƙasa da 1kHz yana buƙatar tsayin zare mai girma.
Hoto na 1: Zane-zanen zane na zoben zare mai zagaye.
Babban dalilin amfani da madaukai na zare shine cewa matsakaicin tsayin zare na iya samar da jinkiri na dogon lokaci saboda haske yana tafiya da juyawa da yawa a cikin zare. Domin raba hasken da aka watsa a cikin madaukai daban-daban, ana iya amfani da na'urar daidaitawa ta acousto-optic a cikin madauki don samar da wani canjin mita (misali, 100MHz). Saboda wannan canjin mita ya fi girma fiye da faɗin layi, hasken da ya yi tafiya da adadin juyawa daban-daban a cikin madauki za a iya raba shi a cikin yankin mita. A cikinna'urar gano hoto, na asalihasken laserkuma ana iya amfani da bugun hasken bayan canjin mita don auna faɗin layin.
Idan babu na'urar ƙara girma a cikin madauki, asarar da ke cikin na'urar daidaita sauti da zare (acousto-optic modulator) tana da girma sosai, kuma ƙarfin hasken zai lalace sosai bayan madauki da yawa. Wannan yana iyakance adadin madauki sosai lokacin da aka auna faɗin layi. Ana iya ƙara amplifiers na fiber a cikin madauki don kawar da wannan iyakancewa.
Duk da haka, wannan yana haifar da sabuwar matsala: kodayake hasken da ke wucewa ta juyi daban-daban ya bambanta gaba ɗaya, siginar bugun ta fito ne daga nau'ikan photons daban-daban, wanda ke canza yanayin bugun gaba ɗaya. Za a iya tsara zoben fiber na gani yadda ya kamata don hana waɗannan tasirin yadda ya kamata. A ƙarshe, ƙarfin madaurin zaren cyclic yana iyakance ta hanyar hayaniyarƙara ƙarfin fiberHaka kuma ya zama dole a yi la'akari da rashin daidaiton zare da layukan da ba na Lorentz ba a cikin sarrafa bayanai
Lokacin Saƙo: Disamba-12-2023