Ukusetshenziswa kwe-Single Frequency Semiconductor Laser ekulinganisweni okunembile kokuphazamiseka kwamagagasi okukhanya

Ukusetshenziswa kweI-Laser ye-Single Frequency Semiconductorekulinganisweni Okunembile Kokuphazamiseka Kwamagagasi Okukhanya
Ukusetshenziswa kwemvamisa eyodwai-laser ye-semiconductorKuxoxwa ngezinkambu zokulinganisa ngokunemba njenge-fiber optic hydrophones kanye ne-ground listening interferometers, futhi umthelela oyinhloko wokusebenza kwe-laser ekusebenzeni kwezinhlelo ze-interferometer uhlaziywa ngokujulile.

Isakhiwo esiyinhloko kanye nesimiso sokusebenza sohlelo: Uhlelo lwe-fiber optic hydrophone lwakhiwe kakhulu ikhanda lokuzwa kanye ne-interferometer (kuthatha i-MZ interferometer njengesibonelo). Isimiso esiyisisekelo ukuthi isignali yomsindo (umfutho womsindo Δ p) isebenza ekhanda lokuzwa, okubangela izinguquko ebudeni kanye nenkomba yokukhanya kwe-fibre yokuzwa ezungeze isilinda esingenalutho, ngaleyo ndlela kwethula izinguquko endleleni yokubona. Lolu shintsho lwendlela encane yokubona (okungukuthi ushintsho lwesigaba) lutholakala ngokuzwela okuphezulu yi-interferometer.

1. Ikhanda lenzwa: Umsebenzi walo oyinhloko ukuguqula ukudlidliza komsindo kube izinguquko endleleni yokukhanya ye-interferometer. I-sensitivity coefficient s ihlobene nezici ezifana nobude befayibha L, futhi imicu yokuzwa ende inenzuzo ekuthuthukiseni ukuzwela kohlelo.
2. I-Interferometer: "Isikhali esingcono kakhulu" sokuthola izinguquko zesigaba esincane. Ukuqina kokukhanya okuphumayo kunobudlelwano be-cosine nomehluko wesigaba. Ngokuzinzisa i-static phase bias φ ₀ endaweni yokusebenza ye-orthogonal ((m+1/2) π), uhlelo lungafinyelela ukuzwela okuphezulu kakhulu kokuthola.
3. Amapharamitha omthombo wokukhanya abalulekile athinta ukusebenza kwesistimu: Lesi sihloko sigxile ekuhlaziyeni imikhawulo yokusebenza kwe-laser ekufinyeleleni isinqumo sesigaba esiphezulu (ngenhloso engu-≤ 1 μ rad).
4. I-Laserumsindo wemvamisa kanye nobubanzi bomugqa: Umsindo wemvamisa we-laser ungabangela umsindo wesigaba sokuphazamiseka, ngaleyo ndlela unciphise ukubonakala kwemingcele yokuphazamiseka. Kwi-interferometer enomehluko wendlela yokukhanya ongaba yimitha eli-1, ukuze kufezwe isinqumo sesigaba esingu-1 μ rad, ububanzi bomugqa we-laser kudingeka bube ngaphansi kwama-Hz angaba ngu-30. Lesi sidingo siphezulu kakhulu sokuzinza kwemvamisa yeumthombo wokukhanya.
5. Umsindo wokuqina kwe-laser: Umsindo wokuqina ohlobene (i-RIN) we-laser uzoguqulwa ngqo ube yiphutha lesigaba sesignali yokuphazamiseka. Ukuze kufezwe isinqumo sesigaba esingu-1 μ rad ngamandla okukhanya okuthola ajwayelekile (~100 μ W), i-RIN ye-laser idinga ukuncishiswa ibe ngaphansi kuka--120 dB. Lesi sidingo esiphezulu kakhulu sokuzinza kokuqina komthombo wokukhanya.

Ngamafuphi, ngokuhlaziya uhlelo lwe-fiber optic hydrophone, izidingo eziqinile zomthombo wokukhanya oyinhloko - i-single frequency semiconductor laser - maqondana nobubanzi obuncane kakhulu (ukuqina kwemvamisa ephezulu) kanye nomsindo ophansi kakhulu ekulinganisweni kokunemba okusekelwe kusimiso sokuphazamiseka ziyachazwa, futhi izinselele zokuzinzisa imvamisa ye-laser ezibhekene nezinhlelo zokusebenza zesistimu ezinkulu ziyavezwa.