I-laser ye-pulsed ye-high-power ene-fiber ye-MOPA yonke

I-laser ye-pulsed ephezulu yamandlangolwakhiwo lwe-MOPA lwe-fiber yonke

Iindidi eziphambili ze-fiber lasers zibandakanya i-resonator enye, indibaniselwano ye-beam kunye ne-master oscillating power amplifier (MOPA) izakhiwo. Phakathi kwazo, ulwakhiwo lwe-MOPA lube yenye yezona ndawo ziphambili zophando ngenxa yokukwazi ukuphumeza ukusebenza okuphezulu.ipulsed laserisiphumo esinobubanzi be-pulse ehlengahlengiswayo kunye nokuphindaphinda ukuphindaphinda (okubhekiselwa kubo njengobubanzi be-pulse kunye nokuphindaphinda ukuphindaphinda).

Umgaqo wokusebenza we-laser ye-MOPA umi ngolu hlobo lulandelayo: I-oscillator engundoqo (MO) ngumthombo wembewu osebenza kakhulu.semiconductor lasereyenza ukukhanya komqondiso wembewu kunye neeparamitha ezilungelelanisiweyo ngokumodareyitha ngokuthe ngqo kwe-pulse. I-Field Programmable gate Array (FPGA) iziphumo eziphambili zolawulo lwe-pulse yangoku kunye neeparamitha ezihlengahlengiswayo, ezilawulwa yisekethe yokuqhuba ukuze isebenze umthombo wembewu kwaye igqibe ukumodareyithwa kokuqala kokukhanya kwembewu. Emva kokufumana imiyalelo yolawulo kwi-FPGA ephambili yebhodi yokulawula, i-pump source drive circuit iqala umthombo wempompo ukuvelisa ukukhanya kwempompo. Emva kokuba ukukhanya kwembewu kunye nokukhanya kwempompo kudibaniswe yi-splitter ye-beam, ngokulandelanayo ifakwe kwi-Yb3 + -doped i-double-clad optical fiber (YDDCF) kwimodyuli ye-optical amplification yamanqanaba amabini. Ngethuba le nkqubo, i-Yb3 + ion ithatha amandla okukhanya kwepompo ukwenza ukuhanjiswa kokuguqulwa kwabantu. Emva koko, ngokusekwe kwimigaqo yokwandiswa kwamaza okuhamba kunye nokukhutshwa okukhuthazwayo, ukukhanya kwesiginali yembewu kuphumelela ukuzuza amandla aphezulu kwimodyuli yokukhulisa inqanaba lesibini, ekugqibeleni ikhuphe amandla aphezulu.i-nanosecond pulsed laser. Ngenxa yokonyuka kwamandla encopho, isignali ye-pulse eyandisiweyo inokufumana uxinzelelo lobubanzi be-pulse ngenxa yesiphumo sokufumana i-clamping. Kwizinto ezisebenzayo, ulwakhiwo olunamanqanaba ngamanqanaba amaninzi luhlala lwamkelwa ukomeleza ngakumbi amandla emveliso kunye nokufumana impumelelo.

Inkqubo yesekethe ye-laser MOPA iqulunqwe yibhodi yolawulo ephambili yeFPGA, umthombo wempompo, umthombo wembewu, ibhodi yesekethe yomqhubi, iamplifier, njl. njl. Ibhodi yolawulo ephambili yeFPGA iqhuba umthombo wembewu ukuba ikhuphe i-MW-level seed ekrwada iipulses ukukhanya kunye parameters adjustable ngokuvelisa ipulse imiqondiso yombane kunye adjustable waveforms, pulse00005 ububanzi (3) 900kHz). Lo mqondiso ufaka igalelo nge-isolator kwimodyuli yokukhulisa i-optical yamanqanaba amabini eyenziwe yi-preamplifier kunye ne-amplifier ephambili, kwaye ekugqibeleni ikhupha i-laser ye-high-energy short-pulse ngokusebenzisa i-isolator ye-optical kunye nomsebenzi wokudibanisa. Umthombo wembewu uxhotyiswe nge-photodetector yangaphakathi ukubeka iliso kwimveliso yamandla ngexesha langempela kwaye uyondle ukubuyisela kwibhodi yokulawula ephambili yeFPGA. Ibhodi yolawulo ephambili ilawula iisekethe zokuqhuba impompo 1 kunye ne-2 ukuphumeza imisebenzi yokuvula nokuvala imithombo yempompo 1, 2 kunye ne-3.ifotodetectoriyasilela ukubona imveliso yokukhanya komqondiso, ibhodi yolawulo engundoqo iya kuvala umthombo wempompo ukukhusela umonakalo kwiYDDCF kunye nezixhobo ezibonakalayo ngenxa yokungabikho kwegalelo lokukhanya kwembewu.

Inkqubo ye-MOPA ye-laser optical path ithatha isakhiwo se-fiber yonke kwaye iqulethe imodyuli ye-oscillation engundoqo kunye nemodyuli yokukhulisa izigaba ezimbini. Imodyuli ephambili ye-oscillation ithatha i-semiconductor laser diode (LD) kunye ne-wavelength ephakathi kwe-1064nm, ububanzi bomgca we-3nm, kunye negunya eliphezulu eliqhubekayo lokuphuma kwe-400mW njengomthombo wembewu, kwaye idibanise ne-fiber Bragg grating (FBG) kunye ne-reflectivity ye-99.9. ukwenza inkqubo yokukhetha ubude bobude. Imodyuli yokukhulisa inqanaba le-2 ithatha uyilo lwempompo ebuyela umva, kunye neYDDCF eneedayamitha ezingundoqo ze-8 kunye ne-30μm ziqwalaselwe ngokulandelelana njengenzuzo yemidiya. I-coefficients yokufunxa impompo yokwambathisa ehambelanayo yi-1.0 kunye ne-2.1dB/m@915nm, ngokulandelanayo.