MeneneLaser mai faɗi mai faɗi?
Laser mai faɗi mai faɗi, Kalmar "faɗin layi" tana nufin faɗin layin bakanlasera cikin yankin mitar, wanda yawanci ana ƙididdige shi dangane da rabin kololuwar cikakken faɗin bakan (FWHM). Faɗin layi galibi yana shafar ta hanyar radiation na atoms ko ions masu motsawa, hayaniyar mataki, girgizar injina na resonator, girgizar zafin jiki da sauran abubuwan waje. Ƙaramin ƙimar faɗin layi, mafi girman tsarkin bakan, wato, mafi kyawun monochromaticity na laser. Lasers masu irin waɗannan halaye yawanci suna da ƙarancin hayaniyar mataki ko mita da ƙarancin hayaniyar ƙarfi. A lokaci guda, ƙaramin ƙimar faɗin layi na laser, mafi ƙarfi da haɗin kai, wanda ke bayyana a matsayin tsayin haɗin kai mai tsawo.
Fahimta da amfani da ƙananan laser mai faɗi
An iyakance shi da faɗin layin riba na kayan aiki na laser, kusan ba zai yiwu a cimma fitowar kunkuntar laser mai faɗi ta hanyar dogaro da oscillator na gargajiya ba. Domin a cimma aikin kunkuntar laser mai faɗi ta layi, yawanci yana da mahimmanci a yi amfani da matattara, grating da sauran na'urori don iyakance ko zaɓar modulus na tsayi a cikin kewayon riba, ƙara bambancin riba tsakanin yanayin tsayi, don haka akwai ƴan ko ma sau ɗaya kawai yanayin juyawa a cikin resonator na laser. A cikin wannan tsari, sau da yawa yana da mahimmanci a sarrafa tasirin hayaniya akan fitowar laser, da kuma rage faɗaɗa layukan haske da canjin yanayin zafi na muhallin waje ke haifarwa; A lokaci guda, ana iya haɗa shi da nazarin yawan hayaniyar lokaci ko mita don fahimtar tushen hayaniya da inganta ƙirar laser, don cimma ingantaccen fitarwa na kunkuntar laser mai faɗi ta layi.
Bari mu dubi yadda ake aiwatar da aikin kunkuntar layin layi na nau'ikan laser daban-daban.
Na'urorin laser na Semiconductor suna da fa'idodin ƙaramin girma, ingantaccen aiki, tsawon rai da fa'idodin tattalin arziki.
Ana amfani da na'urar resonator ta Fabry-Perot (FP) a cikin fasahar gargajiyaLasers na semiconductorYawanci yana juyawa a cikin yanayin tsayi da yawa, kuma faɗin layin fitarwa yana da faɗi kaɗan, don haka ya zama dole a ƙara ra'ayoyin gani don samun fitowar faɗin layi mai kunkuntar.
Ra'ayoyin da aka rarraba (DFB Laser) da Rarraba Bragg reflection (DBR) sune na'urori biyu na semiconductor na gani na ciki. Saboda ƙaramin matakin grating da kuma zaɓin tsayi mai kyau, yana da sauƙi a sami tsayayyen fitowar layin mita ɗaya mai kunkuntar. Babban bambanci tsakanin tsarin biyu shine matsayin grating: tsarin DFB Laser yawanci yana rarraba tsarin lokaci na Bragg grating a cikin resonator, kuma resonator na DBR yawanci yana ƙunshe da tsarin reflection grating da yankin riba da aka haɗa a cikin saman ƙarshe. Bugu da ƙari, lasers na DFB suna amfani da gratings da aka saka tare da ƙarancin refractive index bambanci da ƙarancin reflective. Lasers na DBR suna amfani da gratings na saman tare da babban refractive index bambanci da babban reflective. Dukansu tsarin suna da babban kewayon free spectral kuma suna iya yin reflection na tsawon rai ba tare da tsalle yanayin ba a cikin kewayon nanometers kaɗan, inda laser DBR yana da faɗin kewayon reflection fiye daLaser DFBBugu da ƙari, fasahar mayar da martani ga na'urar hangen nesa ta waje, wadda ke amfani da abubuwan gani na waje don mayar da martani ga hasken da ke fitowa daga guntuwar laser na semiconductor da kuma zaɓar mitar, za ta iya aiwatar da aikin laser na semiconductor mai faɗi kaɗan.
(2) Lasers na fiber
Laser ɗin fiber yana da ingantaccen juyar da famfo, ingancin hasken rana mai kyau da kuma ingantaccen haɗin kai, waɗanda sune batutuwan bincike masu zafi a fannin laser. A cikin yanayin zamanin bayanai, laser ɗin fiber yana da kyakkyawan jituwa da tsarin sadarwa na fiber na gani na yanzu a kasuwa. Laser ɗin fiber mai mita ɗaya tare da fa'idodin faɗin layi mai faɗi, ƙarancin hayaniya da kyakkyawan haɗin kai ya zama ɗaya daga cikin mahimman alkiblar ci gabansa.
Aikin yanayin tsayi ɗaya shine tushen fiber laser don cimma fitowar faɗin layi mai faɗi, yawanci bisa ga tsarin resonator na fiber laser mai mita ɗaya ana iya raba shi zuwa nau'in DFB, nau'in DBR da nau'in zobe. Daga cikinsu, ƙa'idar aiki na DFB Laser da DBR fiber lasers mai mita ɗaya yayi kama da na DFB da DBR semiconductor lasers.
A shekarar 1960, laser ruby na farko a duniya shine laser mai ƙarfi, wanda aka siffanta shi da ƙarfin fitarwa mai yawa da kuma faɗin tsawon tsayi. Tsarin sararin samaniya na musamman na laser mai ƙarfi yana sa ya fi sassauƙa wajen tsara fitowar kunkuntar layin layi. A halin yanzu, manyan hanyoyin da aka aiwatar sun haɗa da hanyar rami mai gajeren zango, hanyar rami mai hanya ɗaya, hanyar intracavity standard, hanyar rami mai juyawa, hanyar rami mai juyawa, hanyar Bragg grating da hanyar allurar iri.
Lokacin Saƙo: Yuni-03-2025