Laser mai ƙarfin pulsed mai ƙarfitare da tsarin MOPA mai dukkan zare
Manyan nau'ikan lasers na fiber sun haɗa da tsarin resonator guda ɗaya, haɗin beam da kuma tsarin amplifier mai ƙarfi (MOPA). Daga cikinsu, tsarin MOPA ya zama ɗaya daga cikin wuraren bincike na yanzu saboda iyawarsa ta cimma babban aiki.laser mai bugun jinifitarwa tare da faɗin bugun jini mai daidaitawa da mitar maimaitawa (wanda ake kira faɗin bugun jini da mitar maimaitawa).
Ka'idar aiki na laser MOPA ita ce kamar haka: Babban oscillator (MO) tushen iri ne mai aiki mai girma.Laser na semiconductorwanda ke samar da hasken siginar iri tare da sigogi masu daidaitawa ta hanyar daidaita bugun jini kai tsaye. Babban sarrafawa na Field Programmable gate Array (FPGA) yana fitar da siginar halin yanzu ta bugun jini tare da sigogi masu daidaitawa, waɗanda da'irar tuƙi ke sarrafawa don sarrafa tushen iri da kuma kammala canjin farko na hasken iri. Bayan karɓar umarnin sarrafawa daga babban allon sarrafawa na FPGA, da'irar tuƙin tushen famfo tana fara tushen famfo don samar da hasken famfo. Bayan an haɗa hasken iri da hasken famfo ta hanyar mai raba haske, ana allurar su bi da bi cikin zare mai haske mai rufe biyu na Yb3+ (YDDCF) a cikin tsarin ƙara haske mai matakai biyu. A lokacin wannan tsari, ions na Yb3+ suna shan kuzarin hasken famfo don samar da rarraba juzu'i na yawan jama'a. Daga baya, bisa ga ka'idodin ƙara haske na tafiya da kuma fitar da hayaki mai motsawa, hasken siginar iri yana samun babban riba a cikin tsarin ƙara haske mai matakai biyu, a ƙarshe yana fitar da babban iko.nanosecond pulsed laserSaboda ƙaruwar ƙarfin kololuwa, siginar bugun da aka ƙara na iya fuskantar matsi na faɗin bugun jini saboda tasirin matsewar riba. A aikace-aikace, galibi ana amfani da tsarin ƙara girma na matakai da yawa don ƙara haɓaka ƙarfin fitarwa da kuma samun inganci.
Tsarin da'irar laser na MOPA ya ƙunshi babban allon sarrafawa na FPGA, tushen famfo, tushen iri, allon da'irar direba, amplifier, da sauransu. Babban allon sarrafawa na FPGA yana tura tushen iri don fitar da bugun hasken iri na matakin MW tare da sigogi masu daidaitawa ta hanyar samar da siginar lantarki ta bugun jini tare da siffofin raƙuman ruwa masu daidaitawa, faɗin bugun jini (5 zuwa 200ns), da kuma yawan maimaitawa (30 zuwa 900kHz). Ana shigar da wannan siginar ta hanyar mai rabawa zuwa tsarin ƙara haske na matakai biyu wanda ya ƙunshi preamplifier da babban amplifier, kuma a ƙarshe yana fitar da laser mai ƙarfi mai gajeren bugun jini ta hanyar mai raba haske tare da aikin haɗakarwa. Tushen iri yana da na'urar gano hoto ta ciki don sa ido kan ƙarfin fitarwa a ainihin lokaci kuma ya mayar da shi zuwa babban allon sarrafawa na FPGA. Babban allon sarrafawa yana sarrafa da'irar tuƙin famfo 1 da 2 don cimma ayyukan buɗewa da rufewa na tushen famfo 1, 2 da 3. Lokacin dana'urar gano hotokasa gano fitowar hasken siginar, babban allon sarrafawa zai rufe tushen famfo don hana lalacewar YDDCF da na'urorin gani saboda rashin shigar hasken iri
Tsarin hanyar laser na MOPA yana ɗaukar tsarin fiber mai dukkan zare kuma ya ƙunshi babban tsarin oscillation da kuma tsarin ƙara girma matakai biyu. Babban tsarin oscillation yana ɗaukar diode na laser semiconductor (LD) tare da tsawon tsakiya na 1064nm, faɗin layi na 3nm, da kuma matsakaicin ƙarfin fitarwa mai ci gaba na 400mW a matsayin tushen iri, kuma yana haɗa shi da fiber Bragg grating (FBG) tare da nuna haske na 99%@1063.94nm da faɗin layi na 3.5nm don samar da tsarin zaɓin tsawon tsayi. Tsarin ƙara girma matakai 2 yana ɗaukar ƙirar famfo mai juyawa, kuma YDDCF tare da diamita na tsakiya na 8 da 30μm an tsara su azaman kafofin samun riba. Ma'aunin sha na famfon da suka dace sune 1.0 da 2.1dB/m@915nm, bi da bi.
Lokacin Saƙo: Satumba-17-2025