Chii chinonzilaser yakamanikana ine upamhi hwemutsara?
Laser ine upamhi hwemutsara mutete, Izwi rekuti "upamhi hwemutsara" rinoreva upamhi hwemutsara wespectral welaserMunzvimbo yema frequency, iyo inowanzo verengerwa maererano nehafu-peak full width ye spectrum (FWHM). Linewidth inonyanya kukanganiswa nemwaranzi inongoerekana yaitika yemaatomu kana ma ions anofara, phase noise, mechanical vibration ye resonator, temperature jitter nezvimwe zvinhu zvekunze. Kana kukosha kwe line width kukaderera, kuchena kwe spectrum kwakakwira, ndiko kuti, monochromaticity ye laser iri nani. Lasers dzine hunhu hwakadaro dzinowanzova ne phase kana frequency noise shoma uye relative intensity noise shoma. Panguva imwe chete, linear width value ye laser iri diki, coherence inoenderana nayo yakasimba, iyo inoratidzwa se coherence length yakareba kwazvo.
Kuzadzikiswa uye kushandiswa kwelaser yakamanikana yemutsara
Yakaganhurirwa nehupamhi hwekuwana hwechinhu chinoshanda chelaser, hazvigoneke kuona zvakananga kubuda kwelaser ine hurefu hwemutsara nekushandisa oscillator yechinyakare pachayo. Kuti ugone kuona mashandiro elaser ine hurefu hwemutsara, zvinowanzo dikanwa kushandisa mafirita, grating nezvimwe zvishandiso kuganhurira kana kusarudza longitudinal modulus mu gain spectrum, kuwedzera mutsauko wekuwana pakati pe longitudinal modes, kuitira kuti pave ne oscillation shoma kana imwe chete ye longitudinal mode mulaser resonator. Mukuita uku, zvinowanzo dikanwa kudzora simba reruzha pa laser output, uye kuderedza kuwedzera kwe spectral lines kunokonzerwa ne vibration uye tembiricha shanduko yekunze; Panguva imwe chete, inogona zvakare kubatanidzwa nekuongorora phase kana frequency noise spectral density kuti unzwisise kwakabva ruzha uye kugadzirisa dhizaini yelaser, kuitira kuti uwane stable output yelaser ine hurefu hwemutsara.
Ngatitarisei kushanda kwemutsara wakamanikana wemhando dzakasiyana dzema lasers.
Malaser eSemiconductor ane zvakanakira zvehukuru hudiki, kushanda zvakanaka, kugara kwenguva refu uye mabhenefiti ehupfumi.
Iyo Fabry-Perot (FP) optical resonator inoshandiswa mune zvechinyakarelaser dze semiconductorkazhinji inotenderera mu multi-longitudinal mode, uye upamhi hwemutsetse wekubuda hwakafara, saka zvakakosha kuwedzera mhinduro ye optical kuti uwane kubuda kwehupamhi hwemutsetse wakamanikana.
Distributed feedback (DFB Laser) neDistributed Bragg reflection (DBR) imhando mbiri dzeinternal optical feedback semiconductor lasers. Nekuda kwe small grating pitch uye good wavelength selectivity, zviri nyore kuwana stable single-frequency narrow linewidth output. Musiyano mukuru pakati pezvimiro zviviri izvi inzvimbo ye grating: chimiro cheDFB Laser chinowanzo govera chimiro che periodic cheBragg grating mu resonator yese, uye resonator yeDBR inowanzo umbwa ne reflection grating structure uye gain region yakabatanidzwa mu end surface. Pamusoro pezvo, DFB lasers dzinoshandisa embedded gratings dzine low refractive index contrast uye low reflectivity. DBR lasers dzinoshandisa surface gratings dzine high refractive index contrast uye high reflectivity. Zvimiro zvese zvine free spectral range yakakura uye zvinogona kuita wavelength tuning pasina mode jump mu range ye nanometers shoma, uko DBR laser ine width tuning range yakafara kupfuuraLaser yeDFBPamusoro pezvo, tekinoroji yemhinduro yekunze kwemukati mechiedza, iyo inoshandisa zvinhu zvekunze zvechiedza kupindura chiedza chinobuda che semiconductor laser chip uye kusarudza frequency, inogonawo kuita kuti semiconductor laser ishande zvakanaka.
(2) Malaser efaibha
Malaser efiber ane simba guru rekushandura pombi, mhando yakanaka yemwaranzi uye kushanda zvakanaka kwekubatanidza, izvo zviri nyaya dzinotsvakurudzwa zvakanyanya mumunda welaser. Mukati merimwe nguva yeruzivo, malaser efiber ane hukama hwakanaka nemasisitimu ekutaurirana e optical fiber aripo pamusika. Laser yefiber ine mabhenefiti ehupamhi hwemutsara wakamanikana, ruzha rwakaderera uye kubatana kwakanaka yave imwe yenzira dzakakosha dzekugadzirwa kwayo.
Kushanda kwe single longitudinal mode ndiko musimboti we fiber laser kuti ibudise mutsetse wakamanikana, kazhinji zvichienderana nechimiro che resonator, single frequency fiber laser inogona kukamurwa kuva DFB type, DBR type uye ring type. Pakati pavo, musimboti wekushanda kweDFB Laser neDBR single-frequency fiber lasers wakafanana newaDFB neDBR semiconductor lasers.
Muna 1960, laser yekutanga yeruby pasi rose yaive laser yakasimba, ine simba guru rekuburitsa uye yakafara kureba kwewavelength. Maumbirwo akasiyana enzvimbo ye laser yakasimba inoita kuti ive nyore kushandisa pakugadzira nzira yakamanikana yekubvisa linewidth. Parizvino, nzira huru dzakashandiswa dzinosanganisira nzira pfupi yekuvhara, nzira yekuvhara ring ine nzira imwe chete, nzira yepakati pecavity, nzira yekuvhara torsion pendulum, nzira yekubvisa torsion pendulum, nzira yeBragg grating uye nzira yekuisa mbeu.
Nguva yekutumira: Chikumi-03-2025