I-laser enamandla aphezulu ene-fiber MOPA isakhiwo

I-laser ye-pulsed enamandla amakhulungesakhiwo se-MOPA se-fiber yonke

Izinhlobo eziyinhloko zesakhiwo se-fiber lasers zifaka i-resonator eyodwa, inhlanganisela ye-beam kanye ne-master oscillating power amplifier (MOPA) izakhiwo. Phakathi kwazo, uhlaka lwe-MOPA selube ngenye yezindawo ezifufusa kakhulu ucwaningo ngenxa yekhono laso lokuzuza ukusebenza okuphezulu.i-pulsed laserokukhiphayo onobubanzi obuguquguqukayo beshayela kanye nemvamisa yokuphindaphinda (okubhekiselwa kuyo njengobubanzi be-pulse kanye nemvamisa yokuphindaphinda).

Umgomo wokusebenza kwelaser ye-MOPA umi kanje: I-oscillator eyinhloko (MO) iwumthombo wembewu osebenza kahle kakhulu.I-semiconductor laserekhiqiza ukukhanya kwesignali yembewu ngamapharamitha alungisekayo ngokushintshashintsha kwe-pulse okuqondile. I-Field Programmable gate Array (FPGA) eyinhloko yokulawula ikhipha amasignali wamanje we-pulse anemingcele eguquguqukayo, elawulwa yisekethe yedrayivu ukuze isebenze umthombo wembewu futhi iqedele ukushintshashintsha kokuqala kokukhanya kwembewu. Ngemva kokuthola imiyalelo yokulawula evela ebhodini eliyinhloko lokulawula le-FPGA, isifunda se-pump source drive siqala umthombo wepompo ukukhiqiza ukukhanya kwepompo. Ngemuva kokuthi ukukhanya kwembewu nokukhanya kwepompo kuhlanganiswe yi-splitter ye-beam, ngokulandelanayo kufakwa ku-Yb3+ -doped double-clad optical fiber (YDDCF) kumojula yezinyathelo ezimbili zokukhulisa ukukhanya. Phakathi nale nqubo, ama-Yb3+ ions amunca amandla okukhanya kwephampu ukuze akhe ukusatshalaliswa kokuguqulwa kwabantu. Ngokulandelayo, ngokusekelwe ezimisweni zokukhulisa igagasi elihambayo kanye nokukhishwa okukhuthazwayo, ukukhanya kwesiginali yembewu kuzuza ukuzuza kwamandla aphezulu kumojula yokukhulisa i-optical yezigaba ezimbili, ekugcineni kukhiphe amandla aphezulu.i-nanosecond pulsed laser. Ngenxa yokwenyuka kwamandla aphezulu, isignali ye-pulse ekhulisiwe ingase ibe nokucindezelwa kobubanzi be-pulse ngenxa yomphumela wokubamba inzuzo. Ezinhlelweni ezisebenzayo, izakhiwo zokukhulisa izigaba eziningi zivame ukwamukelwa ukuze kuthuthukiswe amandla okukhiphayo kanye nokuthola ukusebenza kahle.

Isistimu yesekethe ye-laser ye-MOPA yenziwe ngebhodi lokulawula eliyinhloko le-FPGA, umthombo wephampu, umthombo wembewu, ibhodi lesekhethi yomshayeli, i-amplifier, njll. Ibhodi lokulawula eliyinhloko le-FPGA lishayela umthombo wembewu ukuze likhiphe amapulse okukhanya embewu eluhlaza yezinga le-MW ngamapharamitha aguquguqukayo ngokukhiqiza amasignali kagesi we-pulse anama-waveform aguquguqukayo, ukuphindaphinda kwe-20005 900kHz). Le siginali ifakwa ngesihlukanisi ukuya kumojuli yokukhulisa i-optical yezigaba ezimbili ehlanganiswe i-preamplifier kanye ne-amplifier eyinhloko, futhi ekugcineni ikhiphe i-laser ye-short-pulse yamandla aphezulu ngokusebenzisa isihlukanisi esibonakalayo esinomsebenzi wokuhlangana. Umthombo wembewu ufakwe isithwebuli sesithombe sangaphakathi ukuze uqaphe amandla okukhiphayo ngesikhathi sangempela bese uyibuyisela ebhodini lokulawula eliyinhloko le-FPGA. Ibhodi lokulawula eliyinhloko lilawula amasekhethi e-pump drive 1 no-2 ukuze kuzuzwe ukusebenza kokuvula nokuvala imithombo yephampu 1, 2 kanye no-3.i-photodetectoryehluleka ukubona ukuphuma kokukhanya kwesignali, ibhodi eliyinhloko lokulawula lizovala umthombo wepompo ukuvimbela ukulimala kwe-YDDCF kanye namadivayisi optical ngenxa yokuntuleka kokufaka ukukhanya kwembewu.

Isistimu ye-laser optical ye-MOPA isebenzisa isakhiwo se-fiber yonke futhi iqukethe imojula ye-oscillation eyinhloko kanye nemojula yokukhulisa izigaba ezimbili. Imojula eyinhloko ye-oscillation ithatha i-semiconductor laser diode (LD) enobude obumaphakathi obungu-1064nm, ububanzi bomugqa ongu-3nm, namandla okukhipha aphezulu aqhubekayo angu-400mW njengomthombo wembewu, futhi iyihlanganise ne-fiber Bragg grating (FBG) enokubonisa okungu-39.3 5nm6 nomugqa ongu-410 000. ukwakha uhlelo lokukhetha ubude begagasi. Imojuli yokukhulisa izigaba ezi-2 isebenzisa idizayini yephampu ehlehlayo, futhi i-YDDCF enobubanzi obuyingqikithi obungu-8 no-30μm ilungiswa ngokulandelana njengenzuzo yemidiya. Ama-coefficients okumunca iphampu yokunamathela ahambisanayo angu-1.0 no-2.1dB/m@915nm, ngokulandelana.