Kev loj hlob thiab kev ua lag luam ntawm cov laser tunable Tshooj ob

Kev loj hlob thiab kev ua lag luam ntawm cov laser tunable (Ntu ob)

Txoj cai ua haujlwm ntawmlaser kho tau

Muaj li peb lub hauv paus ntsiab lus rau kev ua tiav qhov kev hloov kho qhov ntev ntawm laser. Feem ntaucov lasers uas hloov tausiv cov tshuaj ua haujlwm nrog cov kab fluorescent dav. Cov resonators uas ua rau lub laser muaj qhov poob qis heev tsuas yog hla qhov ntau ntawm qhov wavelength nqaim heev. Yog li ntawd, thawj zaug yog hloov qhov wavelength ntawm lub laser los ntawm kev hloov qhov wavelength sib raug rau thaj tsam poob qis ntawm lub resonator los ntawm qee cov ntsiab lus (xws li lub grating). Qhov thib ob yog hloov qib zog ntawm kev hloov pauv laser los ntawm kev hloov qee qhov kev ntsuas sab nraud (xws li lub teb sib nqus, kub, thiab lwm yam). Qhov thib peb yog kev siv cov teebmeem nonlinear los ua tiav qhov kev hloov pauv wavelength thiab kev kho kom zoo (saib nonlinear optics, stimulated Raman scattering, optical frequency doubling, optical parametric oscillation). Cov lasers ib txwm muaj rau hom kev kho thawj zaug yog cov xim lasers, chrysoberyl lasers, xim chaw lasers, tunable high-pressure gas lasers thiab tunable excimer lasers.

Los ntawm qhov kev xav ntawm kev siv tshuab ua kom pom tseeb, laser tunable feem ntau yog muab faib ua: kev tswj hwm tam sim no, kev tswj hwm kub thiab kev tswj hwm tshuab.
Ntawm lawv, cov thev naus laus zis tswj hwm hluav taws xob yog kom ua tiav qhov kev hloov pauv wavelength los ntawm kev hloov pauv tam sim no, nrog NS-qib tuning ceev, dav tuning bandwidth, tab sis me me tso zis fais fab, raws li cov thev naus laus zis tswj hwm hluav taws xob feem ntau SG-DBR (sampling grating DBR) thiab GCSR laser (auxiliary grating directional coupling backward-sampling reflection). Cov thev naus laus zis tswj hwm kub hloov pauv qhov tso zis wavelength ntawm lub laser los ntawm kev hloov pauv qhov refractive index ntawm thaj chaw laser nquag. Cov thev naus laus zis yooj yim, tab sis qeeb, thiab tuaj yeem hloov kho nrog qhov dav band nqaim ntawm ob peb nm. Cov tseem ceeb raws li cov thev naus laus zis tswj hwm kub yogDFB laser(kev tawm tswv yim faib tawm) thiab DBR laser (Kev cuam tshuam Bragg faib tawm). Kev tswj hwm tshuab feem ntau yog raws li MEMS (micro-electro-mechanical system) thev naus laus zis los ua kom tiav qhov kev xaiv ntawm wavelength, nrog rau qhov loj hloov kho tau bandwidth, lub zog tso zis siab. Cov qauv tseem ceeb raws li kev tswj hwm tshuab yog DFB (kev tawm tswv yim faib tawm), ECL (laser sab nraud) thiab VCSEL (laser ntsug qhov chaw emitting). Cov hauv qab no yog piav qhia los ntawm cov ntsiab lus no ntawm lub hauv paus ntsiab lus ntawm cov lasers tunable.

Daim ntawv thov kev sib txuas lus kho qhov muag

Lub laser tunable yog ib qho tseem ceeb optoelectronic khoom siv hauv ib tiam tshiab ntawm dense wavelength division multiplexing system thiab photon exchange hauv all-optical network. Nws daim ntawv thov ua rau muaj peev xwm, kev ywj pheej thiab kev nthuav dav ntawm optical fiber kis tau tus mob system, thiab tau pom tias muaj kev tuning tas mus li lossis quasi-continuous hauv ntau qhov wavelength.
Cov tuam txhab thiab cov tsev kawm tshawb fawb thoob plaws ntiaj teb tab tom txhawb nqa kev tshawb fawb thiab kev txhim kho ntawm cov lasers tunable, thiab kev nce qib tshiab tau ua tas li hauv daim teb no. Kev ua tau zoo ntawm cov lasers tunable tau txhim kho tas li thiab tus nqi tau txo qis tas li. Tam sim no, cov lasers tunable feem ntau yog muab faib ua ob pawg: semiconductor tunable lasers thiab tunable fiber lasers.
Lub tshuab hluav taws xob semiconductoryog ib qho tseem ceeb ntawm lub teeb pom kev zoo hauv kev sib txuas lus kho qhov muag, uas muaj cov yam ntxwv ntawm qhov me me, lub teeb yuag, kev hloov pauv siab, kev txuag hluav taws xob, thiab lwm yam, thiab yooj yim ua tiav kev sib koom ua ke ntawm ib lub nti optoelectronic nrog lwm yam khoom siv. Nws muaj peev xwm muab faib ua cov laser tawm tswv yim tunable, faib Bragg iav laser, micromotor system ntsug cavity surface emitting laser thiab sab nraud cavity semiconductor laser.
Kev tsim cov laser fiber tunable ua ib qho nruab nrab nce thiab kev tsim cov semiconductor laser diode ua ib qho chaw twj tso kua mis tau txhawb nqa kev tsim cov laser fiber. Lub laser tunable yog raws li 80nm gain bandwidth ntawm cov fiber doped, thiab cov khoom lim tau ntxiv rau lub voj voog los tswj cov wavelength ntawm laser thiab paub txog qhov wavelength tuning.
Kev tsim kho ntawm cov laser semiconductor tunable yog qhov ua haujlwm heev hauv ntiaj teb, thiab kev nce qib kuj tseem ceev heev. Raws li cov lasers tunable maj mam mus txog cov lasers wavelength ruaj khov hauv cov nqe lus ntawm tus nqi thiab kev ua tau zoo, lawv yuav tsis zam kev siv ntau dua thiab ntau dua hauv cov kab ke sib txuas lus thiab ua lub luag haujlwm tseem ceeb hauv cov tes hauj lwm txhua yam yav tom ntej.

Kev cia siab rau kev loj hlob
Muaj ntau hom lasers uas kho tau, uas feem ntau yog tsim los ntawm kev qhia ntxiv txog cov txheej txheem kho qhov ntev ntawm ntau yam lasers ib leeg, thiab qee cov khoom lag luam tau muab rau kev ua lag luam thoob ntiaj teb. Ntxiv nrog rau kev tsim cov lasers kho qhov ntev tas mus li, cov lasers kho tau nrog lwm cov haujlwm sib xyaw ua ke kuj tau tshaj tawm, xws li cov laser kho tau sib xyaw nrog ib lub nti ntawm VCSEL thiab lub tshuab hluav taws xob nqus, thiab cov laser sib xyaw nrog cov qauv grating Bragg reflector thiab lub tshuab hluav taws xob semiconductor thiab lub tshuab hluav taws xob nqus.
Vim tias lub laser wavelength tunable siv dav, lub laser tunable ntawm ntau yam qauv tuaj yeem siv rau ntau lub tshuab sib txawv, thiab txhua tus muaj qhov zoo thiab qhov tsis zoo. Lub laser semiconductor sab nraud tuaj yeem siv ua lub teeb pom kev dav dav hauv cov cuab yeej kuaj precision vim nws lub zog tso zis siab thiab wavelength tunable tas mus li. Los ntawm qhov kev xav ntawm photon kev koom ua ke thiab ua tau raws li yav tom ntej all-optical network, qauv grating DBR, superstructured grating DBR thiab tunable lasers integrated nrog modulators thiab amplifiers tej zaum yuav yog cov teeb pom kev zoo tunable rau Z.
Fiber grating tunable laser nrog lub qhov sab nraud kuj yog ib hom teeb pom kev zoo, uas muaj cov qauv yooj yim, txoj kab dav thiab kev sib txuas fiber yooj yim. Yog tias EA modulator tuaj yeem koom ua ke hauv lub qhov, nws kuj tuaj yeem siv ua qhov chaw ceev ceev tunable optical soliton. Tsis tas li ntawd, tunable fiber lasers raws li fiber lasers tau ua tiav ntau yam hauv xyoo tas los no. Nws tuaj yeem cia siab tias qhov kev ua tau zoo ntawm tunable lasers hauv kev sib txuas lus optical teeb pom kev zoo yuav raug txhim kho ntxiv, thiab feem ntawm kev ua lag luam yuav maj mam nce ntxiv, nrog rau kev cia siab rau daim ntawv thov ci ntsa iab heev.