Ubuchwepheshe be-Laser Source fori-fiber ye-OpticalUkuzwa ingxenye eyodwa
I-Optical Fiber Stering Technology uhlobo lokuzwa ubuchwepheshe obuzwayo kanye nobuchwepheshe be-fiber optical fiber nobuchwepheshe bokuxhumana kwe-fiber optical fiber, futhi sekubenye yamagatsha asebenzayo kakhulu we-PhotoElectric technology. Uhlelo lwe-Optical Fiber Stering luhlanganiswa ngokuningiliziwe i-laser, i-fiber yokudlulisela, into yokuzwakala noma indawo yokushintshanisa, ukutholwa kokukhanya nezinye izingxenye. Amapharamitha achaza izici zamagagasi akhanyayo afaka ukuqina, i-wavelth, isigaba, isimo sombala, njll. Lezi zinhlaka zingashintshwa ngamathonya angaphandle ekudlumbeni kwe-fiber okubonakalayo. Isibonelo, lapho izinga lokushisa, ubunzima, ingcindezi, yamanje, ukuthulula, ukudlidliza, ukujikeleza, ukubola kanye nenani lamakhemikhali ne-chemical kuthinta indlela ebonakalayo, la mapharamitha aguqula ngokulandelana. Ukuzwakala kwe-fiber fiber kususelwa ebudlelwaneni obuphakathi kwalawa mapharamitha nezinto zangaphandle ukuthola inani elihambisanayo lomzimba.
Kunezinhlobo eziningi zeumthombo we-laserisetshenziswe ezinhlelweni zokuzwa izinzwa ze-fiber, ezingahlukaniswa izigaba ezimbili: ehambisanayoImithombo ye-Lasernemithombo yokukhanya engafinyeleleki, engathandekiImithombo ekhanyayoKakhulu faka ukukhanya okukhanyayo nokukhanya okukhanyayo, nemithombo enokukhanya enobumbano ifaka ama-lasers aqinile, ama-lasers awuketshezi, ama-lasers egesi,I-Semiconductor Laserna-i-fiber laser. Okulandelayo ikakhulukaziumthombo wokukhanya we-laserKusetshenziswe kabanzi emkhakheni we-fiber asteing eminyakeni yamuva: umugqa omncane ububanzi be-laser ye-lingle-frequency laser, i-lingle-wavelength iyakhukhula i-laser laser ne-laser emhlophe.
1.1 Izidingo ze-linewidth emincaneImithombo yokukhanya ye-Laser
Uhlelo lwe-Optical Fiber Stering alukwazi ukuhlukaniswa emthonjeni we-laser, njengoba igagasi elilinganiswe elilinganiselwe lesinambuzane, umthombo wamandla we-laser ngokwayo, ukuqina kwesigaba kanye neminye imingcele, ukuzwela kanye nemisindo yezici ezinqumayo zidlala indima enqumayo. Eminyakeni yamuva nje, ngokuthuthukiswa kwezindlela ezinde ze-Ultra-High Resolution Optical Systems Systems, ezemfundo kanye nemboni ubuchwepheshe basebenzise phambili ubuchwepheshe be-linewid ye-LASERTH yokuhlaziya ama-backleency deechnical of Optical Domain kusizinda semvamisa, ngokumboza okubanzi). Izinzuzo zokulungiswa okuphezulu (ukulungiswa kwezinga le-millimeter) kanye nokuzwela okuphezulu (kuze kube-100 DBM) sekube ngomunye wobuchwepheshe onamathemba okusebenza abanzi ekulinganiseni okusatshalaliswa kwe-fiber okusatshalaliswa kanye nobuchwepheshe obuzwayo. Ubuchwepheshe be-core of offr ukusebenzisa umthombo wokukhanya okhanyayo ukufezekisa ukuvalwa imvamisa ye-optical, ngakho-ke ukusebenza komthombo we-laser kunquma izinto ezibalulekile ezifana nebanga lokutholwa kwe-addr, ukuzwela nokuxazululwa. Lapho ibanga lokukhombisa liseduze nobude bokuhambisana nobude bokuhambisana, ubukhulu besiginali beBeat buzovezwa ngokuchazwa yi-coefficial offeccial / c. Ngomthombo wokukhanya kweGaussian onesimo sokubukeka, ukuze uqinisekise ukuthi imvamisa yokushaywa inokubonakala okungaphezulu kwama-90 Ngaphezu kwalokho, ukuthuthukiswa kwezinye izinhlelo zokusebenza nakho kubeke phambili izidingo eziphakeme ze-linewidth yomthombo wokukhanya. Isibonelo, ohlelweni lwe-Optical Fiber Hydrophone, i-linewidth yomthombo wokukhanya inquma umsindo wesistimu futhi inquma isibonakaliso esilinganiselwe sohlelo. Ku-Brillouin time time domain (botdr), ukulungiswa kokulinganisa kwamazinga okushisa nokucindezela kunqunywa ikakhulu yi-linewidth yomthombo wokukhanya. Ku-resonator fiber gyro, ubude bokuvumelana kwegagasi elikhanyayo bungakhuphuke ngokunciphisa ububanzi bemigqa yomthombo wokukhanya, ngaleyo ndlela kuthuthukise ububanzi be-resonator, kanye nokuqinisekisa ukunemba kwe-fiber optic gyro.
Izidingo eziyi-1.2 zokushanela kwe-laser imithombo
I-Lavelength Sweep Laser inokusebenza okuguquguqukayo kwe-waveling, ingabeka esikhundleni sokuphuma kwama-wavelth avelthed, anciphise izindleko zokwakhiwa kohlelo, kuyingxenye ebaluleke kakhulu yohlelo lokuzwa lwe-fiber obonakalayo. Isibonelo, ngokulandela umkhondo we-Gale Fiber, izinhlobo ezahlukene zamagesi zineziqongo ezihlukile zokutholwa kwegesi. Ukuze uqinisekise ukusebenza kwe-Flean Absorption lapho igesi yokulinganisa yanele futhi ifinyelela ukuzwela okuphezulu, kuyadingeka ukuvumelanisa umthombo wokukhanya okukhanyayo ngenani eliphakeme le-molecule yegesi. Uhlobo lwegesi olungatholwa lunqunywa yi-wavelength yomthombo wokukhanya ozwayo. Ngakho-ke, ama-linewidth amancane ama-linewidth anokuqina okuzinzile kwe-Broadband ukusebenza anokulinganisa okuphezulu ukuguquguquka okuphezulu kwezindlela ezizwakalayo ezizwakalayo. Isibonelo, kwabezinye izinto ezisatshalaliswa izinhlelo zokuzwa izinkundla ezisuselwa ekubonisweni kwe-Optical Frequency Domain Reflection, i-laser idinga ukuthi isheshe yafinyelela ngokushesha ukufezekisa ukutholwa okuthe xaxa okuphezulu, kanye nesivinini sokushintshana kwe-laser eguqukayo kuvame ukudingeka ukufinyelela ku-10 PM / μer. Ngaphezu kwalokho, i-wavewthfungfungfunfunfunble i-linewidth Laser nayo ingasetshenziswa kabanzi ku-lidar, ukuzwela okukude kwe-laser kanye nokuhlaziywa okubonakalayo okuphezulu nezinye izinkambu ezizwakalayo. Ukuze uhlangabezane nezidingo zamapharamitha aphezulu okusebenza kwe-bandwidth ye-bandwidth, ukunemba kanye nejubane elikhulu lama-waven-ama-waven-amabutho abubanzi ekufundeni ama-waver-in umsindo we-waven-incoung, nomsindo wesigaba esiphansi, futhi Imvamisa ye-Ultra-ezinzile eqinile namandla.
1.3 Ukufunwa komthombo wokukhanya okumhlophe kwe-laser
Emkhakheni wokuzwakala okubonakalayo, i-Laser ekhanyayo ephezulu emhlophe ibaluleke kakhulu ukuthuthukisa ukusebenza kohlelo. Ngokubanzi ukumbozwa kwe-spectrum ye-White Light Laser, uhlelo lwayo olukhulu kakhulu ohlelweni lokuzwa lwe-fiber optical fiber steating. Isibonelo, lapho usebenzisa i-fib bralg grag (FBG) ukwakha inethiwekhi yenzwa, ukuhlaziya okubukekayo noma indlela yokufanisa yokuhlunga kwenguquko engasetshenziselwa ukudilazwa. Owangaphambili wasebenzisa i-spectrometer ukuze ahlole ngokuqondile i-wavelelth ngayinye ye-FBG resonant kunethiwekhi. Lesi sakamuva sisebenzisa isihlungi sereferensi ukulandelela nokulinganisa i-FBG ekuzwaneni okuzwakalayo, zombili ezidinga umthombo wokukhanya okubanzi njengomthombo wokukhanya kokukhanya kwe-FBG. Ngoba inethiwekhi ngayinye yokufinyelela ye-FBG izoba nokulahleka okuthile okufakwayo, futhi ine-bandwidth engaphezu kwe-0,1 nm, ukugcotshwa okukodwa kwe-FBG Multiple idinga umthombo wokukhanya okubanzi ngamandla aphezulu kanye ne-bandwidth ephezulu. Isibonelo, lapho usebenzisa isikhathi eside i-fiber grating (LPFG) yokuzwakala, ngoba umkhawulokudonsa wesilinganiso esisodwa sokulahleka usezingeni eliphakeme le-10 NM, umthombo wokukhanya obanzi we-bandwidth olwanele futhi enobuhlakani obukhulu obungenamkhawulo buyadingeka ukuze ubonise ngokunembile izici zayo ezivuthayo. Ikakhulu, i-acoustic fiber grating (AIFG) eyakhiwa ngokusebenzisa umphumela we-acousto-optical ingafinyelela uhla lwe-tunering of resonant wavelength kuze kube yi-1000 nm ngokuhleleka kukagesi. Ngakho-ke, ukuhlolwa kwe-gratic gratic nge-Ultra-Wide tuning Runle kubeka inselelo enkulu kububanzi be-bandwidth yomthombo wokukhanya obanzi. Ngokufanayo, eminyakeni yamuva nje, i-bragg ye-bragg fiber i-fiber nayo isetshenziswe kabanzi emkhakheni we-fiber peting. Ngenxa yezimpawu zayo zokulahlekelwa yi-multi-the spectrum, uhla lokusabalalisa lwe-wavelength luvame ukufinyelela ku-40 nm. Indlela yayo yokuzwakala imvamisa ukuqhathanisa ukunyakaza okuhlobene phakathi kweziqongo eziningi zokudlulisela, ngakho-ke kuyadingeka ukukala amandla ayo okuhambisa ngokuphelele. I-bandwidth namandla omthombo wokukhanya okukhanyayo okubanzi kuyadingeka ukuba ngaphezulu.
2. Isimo Sokucwaninga Ekhaya nakwamanye amazwe
2.1 umthombo omncane wokukhanya we-laser
2.1.1 incikeli emincane ye-semiconductor isatshalaliswa impendulo ye-laser
Ngo-2006, uCliche et al. kunciphise isikali se-mhz se-semiconductorI-DFB laser(isatshalaliswe impendulo ye-laser) kwi-KHZ scale usebenzisa indlela kagesi yokuphendula; Ngo-2011, Kessler et al. Kusetshenziswe izinga lokushisa eliphansi kanye nokuqina okuphezulu kwe-crystal cavity ehlanganiswe nokulawulwa kwempendulo esebenzayo ukuthola umphumela we-line-mncane we-linewidth Ngo-2013, i-PEng et al yathola okukhishwa kwe-semiconductor laser nge-linewidth ye-15 KHZ ngokusebenzisa indlela yokulungiswa kwembukwane yangaphandle (FP). Indlela yokuphendula kagesi esebenzisa ikakhulukazi impendulo yokuqina ye-pond-phreency Ngo-2010, uBernhardi et al. Kukhiqizwe i-1 cm ye-Alumina FBG e-Alumina FBG e-Silicon Oxide SubsTrate ukuthola umphumela we-laser ngentambo ububanzi obuyi-1,7 kHz. Ngonyaka ofanayo, uLiang et al. wasebenzisa impendulo yokuzithengisa yokuzimela kwe-rayleward rayleigh eyenziwe ngumuntu odongeni oluphezulu lwe-seconductor laser-laser compling, njengoba kukhonjisiwe kuMfanekiso 1, futhi ekugcineni uthole umphumela we-laser we-160.
Fig. 1 (a) umdwebo we-semiconductor laserwidwid Compression ngokususelwa ekusakazweni kwe-desonator ye-Whishershing Gallery Gallery;
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(c) i-frequency spectrum ye-laser ene-linewidth ecindezelwe ku-160 hz
2.1.2 I-LINGWIDTH TICE LASER
Nge-Linear Cavity Fiber Lasers, ukuphuma kwe-linewidth ye-linewidth laser yemodi eyodwa ende ende kutholakala ngokunciphisa ubude be-resonator nokwandisa isikhathi sokuphumula eside. Ngo-2004, spiegelberg et al. Uthole imodi eyodwa ende endewidinal modewidth Lovewidth Laser okuphumayo nge-LEWIDWIDTH ye-2 KHZ ngokusebenzisa indlela ye-DBR short cavity. Ngo-2007, uShen et al. Kusetshenziswe i-Silicon-doped fiber e-2 cm kakhulu ukubhala i-FBG kwi-fiber ye-bi-doped popopeslensitive fiber, futhi yakufaka nge-fiber esebenzayo ukwakha i-compact linear cavity, yenza umugqa wayo wokukhipha we-laser ongaphansi kwe-1 KHZ. Ngo-2010, yang et al. Kusetshenziswe i-2ccm emfishane ye-2cm emfushane ehlanganiswe ne-fBG ye-FBG ehlanganiswe ukuthola okukodwa okude ye-Longitudinal Mode Laser okuphumayo ngobubanzi obungaphansi kwe-2 KHZ. Ngo-2014, iqembu lasebenzisa umgodi omfishane (i-Virtual Folded Ring Resonator) ehlanganiswe nesihlungi se-FBG-FP ukuthola umphumela we-laser ngobubanzi obuncane, njengoba kukhonjisiwe kuMfanekiso 3. Ngo-2012, cai et al. wasebenzisa isakhiwo esifushane se-1.4cm esifushane ukuthola umphumela we-polaring laser ngamandla okukhipha amakhulu kune-114 mW, i-wavelength ephakathi ne-1540.3 nm, kanye nobubanzi be-4.1 kHz. Ngo-2013, Meng et al. Kusetshenziswe ukusakazwa kwe-Brillouin kwe-erbium-doped fiber nge-caring emfushane yedivaysi ephelele yokulondolozwa kokuthola imodi ye-longitudinal, umphumela we-loouse-somsindo ophansi okhipha amandla okukhishwa kwe-10 mW. Ngo-2015, iqembu lasebenzisa i-caring cavity eyakhiwe nge-45 cm erbium-doped fiber njengoba i-brillouin isabalaza inzuzo ephakathi nendawo ukuthola umkhawulo ophansi kanye nokukhipha okuncane kwe-linewidth Lases.
Fig. 2 (a) umdwebo we-schematic we-SLC fiber laser;
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Isikhathi sePosi: Nov-20-2023