Chii chinonzi anhete linewidth laser?
Narrow linewidth laser, Izwi rekuti "mutsara wakafara" rinoreva upamhi hwemutsara welasermufrequency domain, iyo inowanzoverengerwa maererano nehafu-yepamusoro yakazara upamhi hweiyo spectrum (FWHM). Iyo linewidth inonyanya kukanganiswa nemwaranzi inongoerekana yaitika yemaatomu anonakidzwa kana maion, ruzha rwechikamu, mechanical vibration ye resonator, tembiricha jitter uye zvimwe zvinhu zvekunze. Iyo diki kukosha kwehupamhi hwemutsara, iyo yakakwirira kuchena kweiyo spectrum, ndiko kuti, zviri nani iyo monochromaticity yelaser. MaLaser ane hunhu hwakadai kazhinji ane chikamu chidiki-diki kana frequency ruzha uye kushoma chaiko kwehukama ruzha. Panguva imwecheteyo, iyo idiki iyo mutsara wehupamhi kukosha kwelaser, iyo inosimba inowirirana inobatana, iyo inoratidzwa seyakanyanya kureba yakabatana kureba.
Kuziva uye kushandiswa kweyakamanikana linewidth laser
Yakaganhurirwa neiyo yemukati kuwana mutsara weiyo inoshanda chinhu chelaser, zvinenge zvisingaite kuti uone zvakananga kuburitswa kweiyo nhete mutsara welaser nekuvimba neiyo yechinyakare oscillator pachayo. Kuti uone kushanda kweakatetepa linewidth laser, zvinowanzodikanwa kushandisa mafirita, grating uye zvimwe zvishandiso kudzikamisa kana kusarudza longitudinal modulus mune yekuwana spectrum, kuwedzera mambure kuwana mutsauko pakati peiyo longitudinal modes, kuitira kuti pave neashoma kana kunyange imwe chete longitudinal mode oscillation mune laser resonator. Mukuita uku, kazhinji zvinodikanwa kudzora pesvedzero yeruzha pane yekubuda kwelaser, uye kuderedza kuwedzera kwemitsara ye spectral inokonzerwa nekudengenyeka uye shanduko yekushisa kwekunze kwezvakatipoteredza; Panguva imwecheteyo, inogona zvakare kusanganiswa nekuongororwa kwechikamu kana frequency ruzha spectral density kuti unzwisise kwakabva ruzha uye kukwidziridza dhizaini yelaser, kuitira kuti uwane yakagadzikana kubuda kweyakatetepa linewidth laser.
Ngatitarisei kuzadzikiswa kweakatetepa linewidth mashandiro emhando dzakasiyana siyana dze lasers.
Semiconductor lasers ane zvakanakira compact saizi, kushanda kwakanyanya, hupenyu hurefu uye hupfumi hunobatsira.
Iyo Fabry-Perot (FP) optical resonator inoshandiswa muchinyakaresemiconductor laserskazhinji oscillates mu-multi-longitudinal mode, uye upamhi hwemutsara wekubuda hwakakura, saka zvakakosha kuwedzera mhinduro yemaziso kuti uwane kubuda kwehupamhi hwemutsara wakamanikana.
Distributed feedback (DFB Laser) uye Distributed Bragg reflection (DBR) ndiwo maviri akajairika emukati optical mhinduro semiconductor lasers. Nekuda kweiyo diki grating pitch uye yakanaka wavelength kusarudza, zviri nyore kuwana yakagadzikana imwe-frequency yakatetepa linewidth kubuda. Musiyano mukuru pakati pezvimiro zviviri ndiyo nzvimbo yekugezesa: iyo DFB Laser chimiro chinowanzo govera iyo periodic chimiro cheBragg grating mukati me resonator, uye resonator yeDBR inowanzo umbwa yekuratidzira giredhi chimiro uye nharaunda yekuwana yakabatanidzwa munzvimbo yekupedzisira. Uye zvakare, maDFB lasers anoshandisa akamisikidzwa gratings ane yakaderera refractive index musiyano uye yakaderera kutaridzika. DBR lasers anoshandisa pamusoro gratings ane yakakwira refractive index musiyano uye yakakwirira reflexivity. Zvimiro zvese zviri zviviri zvine hombe yemahara yekuona uye inogona kuita wavelength tuning pasina modhi kusvetuka muhuwandu hwema nanometers, uko DBR laser ine yakafara tuning siyana kupfuura iyo.DFB laser. Uye zvakare, iyo yekunze cavity optical mhinduro tekinoroji, iyo inoshandisa ekunze optical zvinhu kuti ipindure iyo inobuda mwenje we semiconductor laser chip uye kusarudza iyo frequency, inogona zvakare kuona yakatetepa mutsara mashandiro eiyo semiconductor laser.
(2) Fiber lasers
Fiber lasers ine yakakwira pombi shanduko inoshanda, yakanaka danda mhando uye yakakwirira coupling kunyatsoita, ari iwo anopisa ekutsvagira misoro mumunda welaser. Mumamiriro ezvinhu ezera reruzivo, mafiber lasers ane kuenderana neazvino optical fiber kutaurirana masisitimu pamusika. Iyo single-frequency fiber laser ine mabhenefiti eyakatetepa mutsara upamhi, yakaderera ruzha uye yakanaka kubatana yave imwe yeakakosha nhungamiro yekukura kwayo.
Single longitudinal mode operation ndiyo musimboti wefiber laser kuti uwane yakamanikana mutsara-wakafara kubuda, kazhinji zvinoenderana nechimiro cheiyo resonator ye single frequency fiber laser inogona kukamurwa kuita DFB mhando, DBR mhando uye mhete mhando. Pakati pavo, iyo nheyo yekushanda yeDFB Laser uye DBR single-frequency fiber lasers yakafanana neiyo yeDFB uye DBR semiconductor lasers.
Muna 1960, yekutanga pasi rose ruby laser yaive yakasimba-nyika laser, inoratidzwa neyakakura kubuda simba uye yakafara wavelength kufukidzwa. Iyo yakasarudzika spatial chimiro chesoli-state laser inoita kuti iwedzere kuchinjika mukugadzirwa kweyakatetepa mutsara wekubuda. Parizvino, nzira huru dzakaitwa dzinosanganisira nzira pfupi yegomba, nzira imwe chete yemhete yegomba, intracavity standard nzira, torsion pendulum mode cavity nzira, vhoriyamu Bragg grating nzira uye nzira yejekiseni yembeu.
Nguva yekutumira: Jun-03-2025