Laser source tekinoroji yeiyo Optical fiber inonzwa chikamu chimwe

Laser Source Technology yeOptical FiberSensing chikamu chimwe

Optical Fiber Sensing Technology rudzi rwekunzwa tekinoroji yakaiswa pamwe chete neye Optical Fiber tekinoroji uye Optical fiber tekinoroji, uye yave imwe yematunhu anoshanda epadelelectric. Optical Fiber Sensing System inonyanya kuumbwa neLaser, transminditi fiber, sensing element kana nzvimbo yekunyora, kuongororwa kwechiedza uye zvimwe zvikamu. Iyo paramita inotsanangura hunhu hwechiedza chivhi zvinosanganisira kuwanda, wavelength Semuenzaniso, kana tembiricha, kumanikidzwa, kumanikidzwa, zvazvino, kufambisa, kudengenyeka, kutenderera, kukotama uye kuwanda kwakakanganisa nzira yechokwadi, aya paramita anochinja anoenderana. Optical Fiber Sensing inoenderana nehukama pakati peiyi paramita uye zvinhu zvekunze kuti uone huwandu hunoenderana.

Kune akawanda marudzi eLaser SourceInoshandiswa muOptical Fiber Inonzwa Systems, iyo inogona kukamurwa kuita zvikamu zviviri: cohentlaser zvinyorwauye zvisingaonekamendenizvi zvigadzirwa, zvisingaonekwiZvigadzirwa zvechiedzainonyanya kusanganisira incandescent mwenje uye inojekesa diodes, uye zvinyorwa zvine mwero zvinosanganisira lasers soler, Liquid lasers, gasi lasers,semiconductor laseruyefiber laser. Zvinotevera zvinonyanya kuitikalaser mwenje tsimeInonyanyisa kushandiswa mumunda weFiber Sensing mumakore apfuura: Warrow mutsara wakakura single-frequency laser, imwe-wavelength chitsva freer uye chena laser.

1.1 Zvinodiwa zveTete TeteWinDhthlaser mwenje

Optical Fiber Sensing System haigone kupatsanurwa kubva kune Laser Source, seyakayera marara Mumakore achangopfuura, nekuvandudzwa kwehurefu-kure kwekupedzisira Spory Fiber Systems metres). Zvakanakisa zvekugadziriswa kwepamusoro Iyo CORE yeCODR tekinoroji ndeyekushandisa tunhile yejenji yechiedza kuti uzadzise Optical frequency tuning, saka kuita kweiyo laser sosi inoona zvinhu zvakakosha senge zvezvakanaka zvekunzwisisa, kunzwa uye kugadzirisa. Kana iyo nzira yekuregerera iri padyo nehurefu hwekunyepedzera, kusimba kweiyo yekurova chiratidzo ichaverengerwa neCoeffication τ / τc. Kune gaussian mwenje sosi ine spectral chimiro, kuitira kuti kuve nekurova frequency ine huwandu hweshoko racho, iyo inokwanisika iyo fiber nehurefu hwe 80, urefu hwaro hwechiedza sosi isingasviki 100 hz. Uye zvakare, kukura kwemamwe mafaro kunoisawo kumberi zvinodiwa zvepamusoro zveiyo mutsara wechiedza sosi yechiedza. Semuenzaniso, mune Optical Fiber Hydrophone System, mutsara wechiedza sosi inosarudza iyo ruzha rwe system uye zvakare inosarudza iyo ishoma yekuyera chiratidzo chehurongwa. MuBrillouin Optical Time Domain Referator (Botdr), kugadziriswa kwekugadzirisa tembiricha uye kushushikana kunonyanya kutsanangurwa neiyo mutsara wechiedza sosi yechiedza. Mune resonator fiber optic gyro, kufuka kwekunyora kwechiedza kunogona kuwedzerwa nekudzora chidimbu uye nekudzora huwandu hweshoko, uye nekuita kuti kuwirirane kwekuyera kweiyo fiber optic gyro.

1.2 zvinodiwa zvekutsvaira laser zvinyorwa

Imwechete Wavelth Schoep Laser ine inoshanduka wave Semuenzaniso, mukutsvaga gasi fiber kunzwa, marudzi akasiyana emagasi ane akasiyana gasi anotambanudza mapundu. Kuti uve nechokwadi chekunyora chiedza chekunyatsoita kana chiyero cheyero chakaringana uye chakaringana kuyerwa kwekunzwa, zvinodikanwa kuti ubatanidze mawindows yeiyo nzvimbo yekuisa pamwe neyekutora kwegasi molecule. Mhando yegesi iyo inogona kuonwa ndeyechokwadi yakatemwa neiyo wavelength yekunzwa kwechiedza sosi. Naizvozvo, dzakatetepa linewidth lasers neakasimba broadband tuning performance ine yakakwira chiyero chekuchinjika mune yakanyanya kunzwa masisitimu ekunzwa. Semuenzaniso, mune vamwe vakagoverwa Optical Fiber Systems zvichibva pane Optical Folliste Domain Kuonekwa, saka mwero wekunyorwa kwesipo Uye zvakare, iyo wavelength tunable yakatetepa linewidth laser inogona zvakare kushandiswa muLidar, laser kure kure nekuongorora uye kumwe kusimbisa kwekuongorora uye kumwe kusimbisa minda. Kuitira kuti usangane nezvinodiwa zvekuita mapapeti ekutambisa bandwidth, tuning yekumhanya kwechidimbu Ultra-yakagadzikana yekubvisa frequency uye simba.

1.3 Kuda kweWhite Laser Chiedza Tsime

Mumunda weye Optical kunzwa, yakakwirira-mhando chena mwenje laser ndeye yakakosha kukosha kwekuvandudza mashandiro ehurongwa. Iyo yakawedzera kufukidzwa kwekutarisa kweiyo chena mwenje laser, iyo yakawedzera kunyorera kwayo mune Optical fiber inonzwa system. Semuenzaniso, kana uchishandisa fiber brag grating (fbg) kuvaka sensor network, kuongorora kwekunyora kana nzira yekufananidza yekufananidza inogona kushandiswa kuti ishandiswe. Iyo yekutanga yakashandiswa spectrometer kune zvakananga kuyedza yega FBG resonant wavelength mune network. Iyo yekupedzisira inoshandisa danda rekutarisa uye kudzikisira fbg mukunzwa, zvese zviri zviviri zvinoda bheji rekunyora sosi seyedzo yechiedza cheFBG. Nekuti yega yega FBG yekuwana network ichave neyakawana kurasikirwa kwekunyepedzera, uye ine bandwidth yekurasikirwa kweinopfuura 0.1 nm, iyo panguva imwe chete yakajeka yeFBG yeFBG yeBroadband ine simba rakakwirira uye yakakwirira bandwidth. Semuenzaniso, kana uchishandisa nguva yakareba fiber grating (LPFG) yekunzwa, sezvo iyo bandwidth yekurasikirwa kamwe chete neyekupedzisira bandwidth uye yakakwana spectrum inodiwa kuti iite nenzira chaiyo yerunoratiki maitiro ayo. Kunyanya, acoustic fiber grating (AIFG) yakavakirwa neiyo yekushandisa acousto-Optical mhedzisiro inogona kuwana tuning huwandu hwekufamba kusvika kune 1000 nm kuburikidza nemagetsi tuning. Naizvozvo, kusimba kwakasimba kwekuedzwa neiyo Ultra-yakafara tuning Range Saizvozvo, mumakore achangopfuura, vakasvibiswa bragg fiber grating zvakare rave kushandiswa zvakanyanya mumunda weFiber kunzwa. Nekuda kweiyo yakawanda-yepamusoro-peak kurasikirwa kwehuremu hunhu, iyo wavelength yekugovera huwandu inogona kuwanzosvika makumi mana nm. Mafungiro ayo anowanzo kuenzanisa kufambidzana nehama pakati pekutapururuka kwakawanda, saka zvakafanira kuyera huwandu hwayo hwekufambisa zvizere. Iyo bandwidth uye simba reiyo yakafara spectrum sosi inodiwa kuti ive yakakwira.

2. Nzvimbo yekutsvaga kumba uye kune dzimwe nyika

2.1 Narrow Linewidth Laser Chiedza Tsime

2.1.1 law linewidth Semiconductor yakaparadzirwa mhinduro laser

Muna 2006, cliche et al. yakaderedza iyo MHZ chiyero cheSemiconductorDfb laser(akagoverwa mhinduro laser) kuKHz chiyero uchishandisa nzira yemagetsi yekupindura; Muna 2011, Kessler et al. yakashandisa tembiricha yakaderera uye yakanyanya kugadzikana kamwechete Crystal cravity yakasanganiswa neiyo inoshanda mhinduro yekudzora kuti uwane Ultra-yakatetepa mutsara LASER LASERS ye40 MHZ; Muna 2013, Peng Et Al akawana Semiconductor Laser ane mutsara wegumi nemashanu KHz nekushandisa nzira yekunze fapry-perot (FP) mhinduro yekugadzirisa. Maitiro emagetsi ekupa mari anonyanya kushandisa pond-drever-hall frequency stabilization mhinduro yekuita kuti laser mutsara wechiedza kuderedzwa. Muna 2010, Bernhardi et al. Yakagadzirwa 1 cm yeErbium-Deped Alumina FBG pane silicon oxide substrate kuti uwane iyo laser inobuda nemutsara we1,7 KHz. Mugore rimwe chetero, liang et al. Yakashandisa iyo yekuzvisarudzira mhinduro yekudzokera kumashure Rayler

Fig. 1 (a) Dhizaini yeSemiconductor Laser Letowdth Compression zvichibva pane kuzviratidza-jekiseni Ralypering yekunze Gallery Mode Resonator;
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2.1.2 yakatetepa linewidth fiber laser

Kune mutsara weCavity Fiber Lasers, iyo yakatetepa laserdth Laser's Longitudinal mode inowanikwa nekupfupisa kureba uye kuwedzera iyo refuitudinal mode kupindirana. Muna 2004, Spiegelberg et al. Wakawana imwe chete refuitudinal mode yakatetepa mutsara laser Muna 2007, shen et al. Yakashandiswa 2 cm inoremedza erbium-ervium fiber yekunyora fbg pane bi-geped filsensitive fiber, ichigadzira iyo laser inobuda mutsara pane 1 KHz. Muna 2010, Yang et al. Yakashandiswa 2CM yakakura kwazvo mutsara mutsara wakabatanidzwa nekaruva fbg filter kuti uwane imwe nguva yakareba yekubuda neyakaenzana pane isingasviki 2 KHz. Muna 2014, timu yakashandisa pfupi pfupi yemhando yeChavity Yakashandisa iyo 1.4cm pfupi pfupi yechidimbu chekuwana polaricing laser inobuda neyekuburitsa simba rakakura kupfuura 114 mw, pakati wavelength of 1540.3 nm Muna 2013, meng et al. Yakashandiswa Brillouin ichiparadzira yeErbium-Fiber Fiber ine kiromita yakazara-bias yekuchengetedza mari yekukwenenzvera Muna 2015, timu yakashandisa chirwere chemhete chakanyorwa makumi mana emamirioni.

Fig. 2 (a) Schematic dhirairo yeiyo SLC Fiber Laser;
(b) Nyora yeHeterodyne chiratidzo chakayerwa ne 97.6 km fiber kunonoka