Tekinoroji yeLaser Yakamanikana Chikamu Chechipiri
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.
Mufananidzo 7 unoratidza chimiro chemalaser akawanda akajairika e single-longitudinal mode solid-state.
Mufananidzo 7(a) unoratidza musimboti wekushanda kwe single longitudinal mode selection zvichibva pa in-cavity FP standard, kureva kuti, narrow linewidth transmission spectrum ye standard inoshandiswa kuwedzera kurasikirwa kwemamwe ma longitudinal modes, kuitira kuti mamwe ma longitudinal modes asvinwe mumakwikwi e mode nekuda kwe small transmittance yavo, kuitira kuti vawane single longitudinal mode operation. Pamusoro pezvo, imwe range ye wavelength tuning output inogona kuwanikwa nekudzora Angle netembiricha ye FP standard uye kuchinja longitudinal mode interval. Mufananidzo 7(b) na (c) zvinoratidza non-planar ring oscillator (NPRO) uye torsional pendulum mode cavity method inoshandiswa kuwana single longitudinal mode output. Musimboti wekushanda ndewekuita kuti beam propagate in one direction mu resonator, zvinobudirira kubvisa uneven spatial distribution yenhamba ye reversed particles mu ordinal standing wave cavity, uye nokudaro kudzivirira pesvedzero ye spatial hole burning effect kuti uwane single longitudinal mode output. Nheyo yekusarudza nzira yeBragg grating (VBG) yakafanana neyema lasers e semiconductor ne fiber narrow line-width ambotaurwa, kureva kuti, nekushandisa VBG sechinhu chekusefa, zvichibva pakusarudza kwayo kwakanaka kwespectral uye Angle selectivity, oscillator inotenderera pawavelength chaiyo kana band kuti iwane basa rekusarudza nzira ye longitudinal, sezvakaratidzwa muMufananidzo 7(d).
Panguva imwe chete, nzira dzakasiyana-siyana dzekusarudza nzira dzenguva refu dzinogona kusanganiswa zvichienderana nezvinodiwa kuti dzivandudze kurongeka kwekusarudza nzira dzenguva refu, kuderedza upamhi hwemutsara, kana kuwedzera simba remakwikwi emodhi nekuisa shanduko yefrequency isina kurongeka nedzimwe nzira, uye kuwedzera urefu hwewavelength yelaser uchishanda muhupamhi hwemutsara wakamanikana, izvo zvakaoma kuita.laser ye semiconductoruyemalaser efaibha.
(4) Brillouin laser
Laser yeBrillouin yakavakirwa pamhedzisiro yeBrillouin scattering (SBS) kuti iwane ruzha rwakaderera, tekinoroji yekuburitsa linewidth yakamanikana, musimboti wayo ndeye kuburikidza nephoton uye internal acoustic field interaction kuti igadzire frequency shift yeStokes photons, uye inoramba ichiwedzerwa mukati megain bandwidth.
Mufananidzo 8 unoratidza dhayagiramu yedanho rekushandurwa kweSBS uye chimiro chekutanga cheBrillouin laser.
Nekuda kwehuwandu hushoma hwe acoustic field, kuchinja kweBrillouin frequency yezvinhu kunowanzova 0.1-2 cm-1 chete, saka ne 1064 nm laser se pombi light, Stokes wavelength inogadzirwa inowanzova 1064.01 nm chete, asi izvi zvinorevawo kuti quantum conversion efficiency yayo yakanyanya kukwira (kusvika 99.99% mudzidziso). Pamusoro pezvo, nekuti Brillouin gain linewidth ye medium inowanzova yeMHZ-ghz (Brillouin gain linewidth yeimwe solid media ingori 10 MHz chete), yakaderera zvikuru pane gain linewidth yechinhu chinoshanda che laser che 100 GHz, saka, The Stokes excited muBrillouin laser inogona kuratidza pachena spectrum damping phenomenon mushure me multiple amplification mu cavity, uye output line width yayo yakamanikana kupfuura pombi line width. Parizvino, Brillouin laser yave nzvimbo inonyanya kutsvagisa munyaya dze photonics, uye kwave nemishumo yakawanda pamusoro pehurongwa hwe Hz ne sub-Hz hwe linewidth yakamanikana zvikuru.
Mumakore achangopfuura, michina yeBrillouin ine magadzirirwo ewaveguide yakabuda mumunda wemifananidzo ye microwave, uye dziri kukura nekukurumidza mukuita kuti ive miniaturization, integration yepamusoro uye resolution yepamusoro. Pamusoro pezvo, Brillouin laser inomhanya muchadenga yakavakirwa pazvinhu zvitsva zvekristaro zvakaita sedhaimani yakapindawo mumaonero evanhu mumakore maviri apfuura, kufambira mberi kwayo musimba remagadzirirwo ewaveguide uye cascade SBS bottleneck, simba reBrillouin laser kusvika 10 W magnitude, zvichiisa hwaro hwekuwedzera kushandiswa kwayo.
Ganhuro guru
Nekutsvaga ruzivo rwemazuva ano, ma laser ehupamhi hwemutsara akamanikana ave chishandiso chakakosha mukutsvagisa kwesainzi nekushanda kwawo kwakanaka, senge laser interferometer LIGO yekuona mafungu egiravhiti, iyo inoshandisa single-frequency narrow linewidth.laserine urefu hwewavelength hwe1064 nm senzvimbo yembeu, uye upamhi hwemutsara wechiedza chembeu huri mukati me5 kHz. Pamusoro pezvo, malaser akapfava ane urefu hwewavelength hunogona kugadziriswa uye asina kusvetuka kwemode anoratidzawo mukana mukuru wekushandisa, kunyanya mukutaurirana kwakabatana, izvo zvinogona kusangana zvakakwana nezvinodiwa zve wavelength division multiplexing (WDM) kana frequency division multiplexing (FDM) yekugadzirisa wavelength (kana frequency), uye inotarisirwa kuva chinhu chikuru chechizvarwa chinotevera chetekinoroji yekutaurirana kwefoni.
Mune ramangwana, kuvandudzwa kwezvinhu zvelaser uye tekinoroji yekugadzirisa zvichawedzera kukurudzira kudzvanywa kwelaser linewidth, kuvandudzwa kwekugadzikana kwema frequency, kuwedzera kwewavelength range uye kuvandudzwa kwesimba, zvichigadzira nzira yekuongorora nyika isingazivikanwe nevanhu.
Nguva yekutumira: Mbudzi-29-2023