Ikoranabuhanga rya laser ryo kumenya fibre optique Igice cya Kabiri
2.2 Gukoresha uburebure bw'umuraba umweisoko ya laser
Gukoresha laser single wavelength sweep mu buryo bw'ibanze ni ukugenzura imiterere y'igikoresho murilaserumwobo (ubusanzwe ni wo mubare w’uburebure bw’umurongo ukoreshwa), kugira ngo hagerwe ku igenzura no guhitamo uburyo bwo kuzunguruka mu mwobo, kugira ngo hagerwe ku ntego yo gutunganya uburebure bw’umuvuduko. Hashingiwe kuri iri hame, mu myaka ya 1980, ishyirwa mu bikorwa rya lasers zishobora guhindurwa ryagezweho ahanini binyuze mu gusimbuza isura y’inyuma ya laser ikoresheje grating ya diffraction, no guhitamo uburyo bwa laser bazunguruka kandi bagatunganya grating ya diffraction n'intoki. Mu 2011, Zhu et al. bakoresheje filters zishobora guhindurwa kugira ngo hagerwe ku ikoreshwa rya lasers zishobora guhindurwa mu buryo bumwe hamwe n’ubugari bw’umurongo muto. Mu 2016, uburyo bwo gukanda bwa linewidth ya Rayleigh bwakoreshejwe ku gukanda kwa dual-wavelength, ni ukuvuga ko stress yakoreshejwe kuri FBG kugira ngo hagerwe ku ikoreshwa rya lasers zifite ubugari bw’umuvuduko, kandi linewidth ya laser isohoka yagenzuwe icyarimwe, ihabwa uburebure bwa dual-wavelength tuning bwa 3 nm. Ikoreshwa rya dual-wavelength rihamye hamwe n’ubugari bw’umurongo bwa 700 Hz. Mu 2017, Zhu et al. hakoreshejwe grafe ya graphene na micro-nano fibre Bragg kugira ngo hakorwe filter ishobora guhindurwamo urumuri rwose, kandi hamwe n'ikoranabuhanga rya Brillouin laser closing, hakoreshejwe ingaruka za graphene zo ku bushyuhe hafi ya 1550 nm kugira ngo haboneke ubugari bwa laser buri hasi ya 750 Hz hamwe no gupima vuba kandi neza 700 MHz/ms mu rugero rw'uburebure bwa 3.67 nm. Nkuko bigaragara ku Ishusho ya 5. Uburyo bwo kugenzura uburebure bwa flue bwavuzwe haruguru bukoresha uburyo bwa laser mu buryo butaziguye cyangwa butaziguye guhindura uburebure bw'uburebure bw'icyuma kiri mu mwobo wa laser.
Igishushanyo cya 5 (a) Igerageza ry'uburebure bw'urumuri rugenzurwa n'urumuri-laser ya fibre ihindukan'uburyo bwo gupima;
(b) Ibyuma bisohora umusaruro ku gisohoka cya 2 hamwe no kongera ingufu za pompe igenzura
2.3 Isoko y'urumuri rwa laser rwera
Iterambere ry'inkomoko y'urumuri rwera ryabaye mu byiciro bitandukanye nko itara rya halogen tungsten, itara rya deuterium,laser ya semiconductorn'isoko ry'urumuri rya supercontinuum. By'umwihariko, isoko ry'urumuri rya supercontinuum, rikozwe n'ingufu za femtosecond cyangwa picosecond zifite imbaraga za super-transient, ritanga ingaruka zitari umurongo w'umurongo z'imiterere itandukanye mu murongo w'amazi, kandi spectrum iraguka cyane, ishobora gutwikira umugozi kuva ku rumuri rugaragara kugera hafi ya infrared, kandi ifite ubwumvikane bukomeye. Byongeye kandi, mu guhindura uburyo fibre yihariye ikwirakwira no kutanyuranamo, spectrum yayo ishobora no kwaguka ikagera no ku mugozi wo hagati wa infrared. Ubwo bwoko bw'isoko rya laser bwakoreshejwe cyane mu nzego nyinshi, nko gupima imiterere y'urumuri, kumenya gaze, gufata amashusho y'ibinyabuzima n'ibindi. Bitewe n'aho urumuri rugarukira n'uburyo butarimo umurongo, spectrum ya mbere ya supercontinuum yakozwe ahanini na laser ya solid-state pumping optical glass kugira ngo ikore supercontinuum optical spectrum mu rugero rugaragara. Kuva icyo gihe, fiber ya optical yagiye ihinduka uburyo bwiza bwo gukora supercontinuum ya wideband kubera ko ifite coefficient nini idahuje umurongo n'umwanya muto wo kohereza. Ingaruka z'ingenzi zitari umurongo zirimo kuvanga imiraba ine, kudahinduka kw'ihindagurika ry'ishusho, guhinduranya ibice byihariye, guhinduranya ibice birenga, gutandukanya soliton, gukwirakwiza Raman, guhinduranya inshuro zirenga za soliton, nibindi, kandi igipimo cya buri ngaruka nacyo kiratandukanye bitewe n'ubugari bw'ihindagurika ry'ishusho n'uburyo fibre ikwirakwira. Muri rusange, ubu isoko y'urumuri rwa supercontinuum igamije cyane cyane kunoza imbaraga za laser no kwagura urwego rwa spectral, no kwita ku kugenzura guhuza kwayo.
3 Incamake
Iyi nyandiko isobanura kandi igasuzuma amasoko ya laser akoreshwa mu gushyigikira ikoranabuhanga ryo kumenya fibre, harimo na narrow linewidth laser, single frequency tunable laser na broadband white laser. Ibisabwa mu ikoreshwa n'uko izi laser zihagaze mu bijyanye no kumenya fibre bigaragazwa mu buryo burambuye. Mu gusesengura ibyo zisabwa n'uko zihagaze mu iterambere, byaje kugaragara ko isoko nziza ya laser yo kumenya fibre ishobora kugera ku musaruro wa laser uciriritse kandi udahindagurika cyane ku murongo uwo ari wo wose n'igihe icyo ari cyo cyose. Kubwibyo, dutangirana na narrow line width laser, na narrow line width laser na white light laser ifite wide gain bandwidth, kandi tugashaka uburyo bwiza bwo kubona isoko nziza ya laser yo kumenya fibre dusesengura iterambere ryazo.
Igihe cyo kohereza: Ugushyingo-21-2023