High-power pulsed Laser tare da duk-fiber MOPA tsarin

Laser mai ƙarfi mai ƙarfitare da duk-fiber MOPA tsarin

Babban nau'ikan nau'ikan Laser na fiber sun haɗa da resonator guda ɗaya, haɗin katako da sifofi mai ƙarfi na oscillating (MOPA). Daga cikin su, tsarin MOPA ya zama ɗaya daga cikin wuraren bincike na yanzu saboda iyawarsa don cimma babban aiki.pulsed Laserfitarwa tare da daidaitacce nisa bugun bugun jini da mitar maimaituwa (ana nufin fadin bugun bugun jini da mitar maimaituwa).

Ka'idar aiki na Laser MOPA shine kamar haka: Babban oscillator (MO) babban tushen iri ne.semiconductor Laserwanda ke haifar da hasken siginar iri tare da sigogi masu daidaitawa ta hanyar daidaitawar bugun jini kai tsaye. Filin Shirye-shiryen Ƙofar Array (FPGA) babban sarrafawa yana fitar da sigina na yanzu tare da madaidaitan sigogi, waɗanda ke sarrafa su ta hanyar da'ira don sarrafa tushen iri da kuma kammala tsarin farko na hasken iri. Bayan karɓar umarnin sarrafawa daga babban hukumar kula da FPGA, da'irar tuƙi na tushen famfo yana farawa tushen famfo don samar da hasken famfo. Bayan hasken iri da hasken famfo an haɗa su ta hanyar mai raba katako, bi da bi za a yi musu allura cikin Yb3+ -doped fiber optic fiber (YDDCF) biyu a cikin ƙirar ƙarawa na gani mai mataki biyu. A lokacin wannan tsari, ions Yb3+ suna ɗaukar makamashin hasken famfo don samar da rarrabawar jama'a. Daga baya, bisa ka'idodin haɓaka igiyar ruwa mai tafiya da haɓakar fitar da iska, hasken siginar iri ya sami babban ƙarfin ƙarfi a cikin tsarin ƙara ƙarfin gani mai mataki biyu, a ƙarshe yana fitar da babban ƙarfi.nanosecond pulsed Laser. Saboda karuwar ƙarfin kololuwa, ƙaramar siginar bugun bugun jini na iya fuskantar matsawa nisa na bugun bugun jini saboda tasirin matsi. A aikace-aikace masu amfani, ana amfani da tsarin haɓaka matakai da yawa don ƙara haɓaka ƙarfin fitarwa da samun inganci.

The MOPA Laser tsarin da'irar ya ƙunshi babban iko na FPGA, tushen famfo, tushen iri, allon direba, amplifier, da dai sauransu. 900 kHz). Ana shigar da wannan siginar ta hanyar keɓewa zuwa ƙirar ƙararrawa na gani mai matakai biyu wanda ya ƙunshi na'urar tantancewa da babban amplifier, kuma a ƙarshe yana fitar da laser gajeriyar bugun jini mai ƙarfi ta hanyar keɓancewar gani tare da aikin haɗin gwiwa. Tushen iri an sanye shi da na'urar gano hoto na ciki don saka idanu kan ikon fitarwa a ainihin lokacin kuma a mayar da shi zuwa babban hukumar kula da FPGA. Babban hukumar kula da famfo yana sarrafa da'irori na 1 da 2 don cimma ayyukan buɗewa da rufewa na tushen famfo 1, 2 da 3. Lokacin damai daukar hotoya kasa gano fitowar hasken siginar, babban allon kula zai rufe tushen famfo don hana lalacewar YDDCF da na'urorin gani saboda rashin shigar da hasken iri.

Tsarin hanya na gani na Laser MOPA yana ɗaukar tsarin duka-fiber kuma ya ƙunshi babban ƙirar oscillation da ƙirar ƙarawa mataki biyu. Babban oscillation module daukan wani semiconductor Laser diode (LD) tare da tsakiyar wavelength na 1064nm, a linewidth na 3nm, da matsakaicin ci gaba da fitarwa ikon 400mW a matsayin iri tushen, da kuma hada shi da fiber Bragg grating (FBG) tare da wani reflectivity na 99% @ 1063 line zuwa 9. tsarin zaɓe na tsawon zango. Modulin haɓakawa na mataki na 2 yana ɗaukar ƙirar famfo mai juyawa, kuma YDDCF tare da diamita na 8 da 30μm ana daidaita su bi da bi azaman kafofin watsa labarai. Matsakaicin madaidaicin famfo sha mai ƙima sune 1.0 da 2.1dB/m@915nm, bi da bi.