Narrow Linewidth Laser Technology Chikamu Chechipiri

Narrow Linewidth Laser Technology Chikamu Chechipiri

(3)Solid state laser

Muna 1960, yekutanga pasi rose ruby ​​laser yaive yakasimba-nyika laser, inoratidzwa neyakakura kubuda simba uye yakafara wavelength kufukidzwa. Iyo yakasarudzika spatial chimiro cheiyo solid-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.

Mufananidzo 7 unoratidza chimiro che akati wandei akajairwa single-longitudinal modhi solid-state lasers.

Mufananidzo 7 (a) unoratidza mutemo wekushanda we single longitudinal mode kusarudzwa zvichienderana ne-in-cavity FP standard, kureva, iyo yakamanikana mutsara wepamhepo transmisheni spectrum yechiyero inoshandiswa kuwedzera kurasikirwa kweimwe nzira dzelongitudinal, kuitira kuti mamwe marefu mamodhi anosefa kunze kweiyo mode yemakwikwi maitiro nekuda kweiyo diki transminal modettance yekuwana imwe chete longitu. Uye zvakare, imwe mhando yewavelength tuning inobuda inogona kuwanikwa nekudzora iyo Angle uye tembiricha yeFP standard uye nekushandura iyo longitudinal mode kupindirana. FIG. 7 (b) uye (c) ratidza iyo isiri-planar ring oscillator (NPRO) uye torsional pendulum mode cavity nzira inoshandiswa kuwana imwechete longitudinal mode kubuda. Nheyo yekushanda ndeyekuita kuti danda ripararire munzira imwe chete mune resonator, zvinobudirira kubvisa kusaenzana kwenzvimbo kugovera kwenhamba yezvikamu zvakadzoserwa mune yakajairwa yakamira mafungu mhango, uye nokudaro kudzivirira pesvedzero yenzvimbo yekupisa gomba kuti iwane imwechete longitudinal modhi inobuda. Nheyo yehuwandu hweBragg grating (VBG) sarudzo yemodhi yakafanana neye semiconductor uye faibha yakamanikana mutsara-upamhi lasers yakambotaurwa, ndiko kuti, nekushandisa VBG sechinhu chesefa, zvichibva pane yayo yakanaka spectral selectivity uye Angle selectivity, iyo oscillator inotenderera pane yakatarwa wavelength kana bhendi kuti iite basa rekureba kusarudzwa, se7.
Panguva imwecheteyo, akati wandei ekureba modhi nzira dzekusarudza dzinogona kusanganiswa zvinoenderana nezvinodiwa kuvandudza iyo longitudinal modhi sarudzo, kuwedzera kupfupisa mutsara, kana kuwedzera iyo mode yemakwikwi kusimba nekuunza nonlinear frequency shanduko uye dzimwe nzira, uye kuwedzera inobuda wavelength yelaser uchishanda mune yakamanikana mutsara, izvo zvakaoma kuita.semiconductor laseruyefiber lasers.

(4) Brillouin laser

Brillouin laser yakavakirwa pakusimudzirwa kweBrillouin kuparadzira (SBS) kuita kuti iwane ruzha rwakaderera, yakamanikana mutsetse wekubuda tekinoroji, musimboti wayo uri kuburikidza nefoton uye yemukati acoustic munda kupindirana kuburitsa imwe frequency shanduko yeStokes photons, uye inoramba ichikwidziridzwa mukati mekuwana bandwidth.

Mufananidzo 8 unoratidza dhayagiramu yedanho rekushandurwa kweSBS uye chimiro chekutanga cheBrillouin laser.

Nekuda kweiyo yakaderera vibration frequency yeacoustic field, iyo Brillouin frequency shift yechinhu inowanzongoita 0.1-2 cm-1, saka ne 1064 nm laser semwenje wepombi, iyo Stokes wavelength inogadzirwa kazhinji inongosvika 1064.01 nm, asi izvi zvakare zvinoreva kuti huwandu hwayo hwekushandura % mu9 hukuru hwakanyanya. Pamusoro pezvo, nekuti iyo Brillouin inowana mutsara wepakati pepakati kazhinji inongori yehurongwa hweMHZ-ghz (iyo Brillouin inowana mutsara weimwe yakasimba midhiya inongosvika gumi MHz), ishoma pane kuwana mutsara weiyo laser inoshanda chinhu cheiyo odha ye100 GHz, saka, The Stokes inofara muBrillouinification muBrillouinspectrum mushure mekuratidzira pachena uye upamhi hwayo hwemutsara wekubuda ine maodha akati wandei ehukuru hwakatetepa pane upamhi hwepombi mutsetse. Parizvino, Brillouin laser yave hotspot yekutsvagisa mumunda wefotonics, uye kwave nemishumo yakawanda paHz uye sub-Hz kurongeka kweyakatetepa kwazvo mutsara wekubuda.

Mumakore achangopfuura, Brillouin zvishandiso zvine waveguide chimiro zvakabuda mumunda wemicrowave photonics, uye vari kukurumidza kukurumidza munzira ye miniaturization, kubatanidzwa kwepamusoro uye kugadzirisa kwepamusoro. Pamusoro pezvo, iyo nzvimbo-inomhanya yeBrillouin laser yakavakirwa pazvinhu zvitsva zvekristaro sedhaimani yakapindawo muchiratidzo chevanhu mumakore maviri apfuura, budiriro yaro musimba reiyo waveguide chimiro uye cascade SBS bottleneck, simba reBrillouin laser kune gumi W magnitude, ichiisa hwaro hwekuwedzera mashandisiro ayo.
General junction
Nekuenderera mberi nekutsvagisa ruzivo rwekucheka-kumucheto, yakatetepa mutsara lasers yave chishandiso chakakosha mukutsvagisa kwesainzi nekuita kwavo kwakanaka, senge laser interferometer LIGO yekuona mafungu emagetsi, inoshandisa imwe-frequency nhete mutsara.laserine wavelength ye1064 nm sechitubu chembeu, uye mutsara wechiedza chembeu chiri mukati me5 kHz. Uye zvakare, yakamanikana-hupamhi lasers ine wavelength tunable uye hapana modhi yekusvetuka inoratidza hukuru hwekushandisa, kunyanya mukutaurirana kwakabatana, iyo inogona kunyatsozadzisa zvinodiwa zvewavelength division multiplexing (WDM) kana frequency division multiplexing (FDM) yewavelength (kana frequency) tunability, uye inotarisirwa kuve musimboti mudziyo wechizvarwa chinotevera chenharembozha yekutaurirana tekinoroji.
Mune ramangwana, kuvandudzwa kwezvinhu zvelaser uye kugadzirisa tekinoroji kuchawedzera kusimudzira kudzvanywa kwelaser linewidth, kuvandudzwa kwefrequency kugadzikana, kuwedzera kwewavelength renji uye kuvandudzwa kwesimba, kugadzira nzira yekuongorora kwevanhu nyika isingazivikanwe.