Fasahar tushen Laser don gano fiber na gani Kashi na biyu

Fasahar tushen Laser don gano fiber na gani Kashi na biyu

2.2 Tsawon igiyoyi guda ɗayatushen laser

Ganewar share tsawon zangon Laser shine da gaske don sarrafa kayan jikin na'urar a cikinLaserrami (yawanci tsakiyar zangon bandwidth na aiki), don cimma iko da zaɓi na yanayin oscillating a tsaye a cikin rami, don cimma manufar daidaita ƙarfin fitarwa. Dangane da wannan ka'ida, tun farkon shekarun 1980, an sami nasarar fahimtar lasers fiber mai kunnawa ta hanyar maye gurbin fuskar ƙarshen Laser tare da grating mai nuna ra'ayi, da zaɓin yanayin cavity na Laser ta hanyar juyawa da hannu tare da daidaita grating diffraction. A cikin 2011, Zhu et al. An yi amfani da matatun da za su iya daidaitawa don cimma fitarwar Laser mai tsayi mai tsayi guda ɗaya tare da kunkuntar layi. A cikin 2016, Rayleigh linewidth compression inji da aka yi amfani da dual-wavelength matsawa, wato, damuwa da aka shafi FBG don cimma dual-wavelength Laser tuning, da fitarwa Laser linewidth da aka saka idanu a lokaci guda, samun wani zangon tuning tsawon 3. nm. Tsayayyen fitarwa mai tsayi biyu tare da faɗin layi na kusan 700 Hz. A cikin 2017, Zhu et al. An yi amfani da graphene da micro-nano fiber Bragg grating don yin matatar mai iya gani gabaɗaya, kuma a haɗe tare da fasahar kunkuntar laser Brillouin, ta yi amfani da tasirin photothermal na graphene kusa da 1550 nm don cimma layin Laser ƙasa da 750 Hz da sauri da sarrafa hoto. ingantaccen sikanin 700 MHz/ms a cikin kewayon tsayin 3.67 nm. Kamar yadda aka nuna a hoto na 5. Hanyar sarrafa tsawon zangon da ke sama tana fahimtar zaɓin yanayin laser ta hanyar kai tsaye ko a kaikaice canza madaidaicin igiyar igiya na na'urar a cikin rami na Laser.

Hoto 5 (a) Saitin gwaji na tsayin igiyoyin gani-mai sarrafawa-Laser fiber mai daidaitawada tsarin ma'auni;

(b) Fitar da kayan aiki a fitarwa 2 tare da haɓakawa na famfo mai sarrafawa

2.3 Farin hasken Laser

Haɓaka tushen hasken farin ya sami matakai daban-daban kamar fitilar halogen tungsten, fitilar deuterium,semiconductor Laserda supercontinuum haske tushen. Musamman ma, tushen hasken supercontinuum, ƙarƙashin zumuwar femtosecond ko picosecond bugun jini tare da babban ƙarfin ɗan lokaci, yana haifar da tasirin umarni daban-daban a cikin waveguide, kuma bakan yana faɗaɗawa sosai, wanda zai iya rufe band ɗin daga haske mai gani zuwa kusa da infrared. kuma yana da haɗin kai mai ƙarfi. Bugu da ƙari, ta hanyar daidaita rarrabuwa da rashin daidaituwa na fiber na musamman, ana iya ƙara bakan sa har zuwa tsakiyar infrared band. Irin wannan tushen Laser an yi amfani da shi sosai a fagage da yawa, kamar haɗin kai na gani, gano iskar gas, nazarin halittu da sauransu. Saboda ƙayyadaddun tushen haske da matsakaici mara tushe, farkon supercontinuum bakan an samo shi ne ta hanyar ƙwaƙƙwarar gilashin laser mai ɗaukar hoto don samar da bakan da ba a iya gani ba a bayyane. Tun daga wannan lokacin, fiber na gani a hankali ya zama kyakkyawan matsakaici don samar da wideband supercontinuum saboda girmansa mai girma mara inganci da ƙaramin filin yanayin watsawa. Babban illolin da ba a haɗa su ba sun haɗa da haɗaɗɗun raƙuman ruwa huɗu, rashin kwanciyar hankali na daidaitawa, daidaitawa ta kai-tsaye, daidaitawa lokaci-lokaci, tsagawar soliton, watsawar Raman, canjin mitar kai tsaye, da dai sauransu, kuma rabon kowane tasiri shima ya bambanta bisa ga bugun jini nisa na tashin hankali bugun jini da watsawa na fiber. Gabaɗaya, yanzu tushen hasken supercontinuum ya fi dacewa don haɓaka ƙarfin laser da faɗaɗa kewayon gani, da kula da sarrafa haɗin kai.

3 Takaitawa

Wannan takarda tana taƙaitawa da kuma sake duba tushen Laser da aka yi amfani da su don tallafawa fasahar gano fiber, gami da kunkuntar layin layi na Laser, Laser mai saurin mitar mitar mitar guda ɗaya da kuma farin Laser mai faɗaɗa. Abubuwan buƙatun aikace-aikacen da matsayin ci gaban waɗannan lasers a fagen ji na fiber ana gabatar da su dalla-dalla. Ta hanyar nazarin buƙatun su da matsayin ci gaban su, an ƙaddamar da cewa madaidaicin tushen Laser don fahimtar fiber na iya cimma fitowar laser kunkuntar kunkuntar da ƙwanƙwasa a kowane rukuni da kowane lokaci. Saboda haka, mun fara da kunkuntar layin Laser, mai kunna kunkuntar layin nisa Laser da farin haske Laser tare da fa'idar bandwidth, da kuma gano ingantacciyar hanya don gane madaidaicin tushen Laser don gano fiber ta hanyar nazarin ci gaban su.