Kusankha gwero labwino la laser: laser ya semiconductor ya m'mphepete mwa mpweya Gawo Loyamba

Kusankha kwabwino kwambirigwero la laser: laser ya semiconductor yotulutsa m'mphepete
1. Chiyambi
Laser ya semiconductorMa chips amagawidwa m'magulu awiri: ma chips a laser otulutsa m'mphepete (EEL) ndi ma chips a laser otulutsa m'mphepete (VCSEL) malinga ndi njira zosiyanasiyana zopangira ma resonators, ndipo kusiyana kwawo kwa kapangidwe kake kwawonetsedwa pa Chithunzi 1. Poyerekeza ndi laser yotulutsa m'mphepete mwa nyanja, chitukuko cha ukadaulo wa laser wotulutsa m'mphepete mwa nyanja ndi chachikulire kwambiri, chokhala ndi kutalika kwakukulu kwa mafunde, chapamwamba kwambiri.zamagetsi ndi kuwalaKugwiritsa ntchito bwino kwa ma laser, mphamvu yayikulu ndi zabwino zina, zoyenera kwambiri pakugwiritsa ntchito laser, kulumikizana kwa kuwala ndi madera ena. Pakadali pano, ma laser a semiconductor omwe amatuluka m'mphepete ndi gawo lofunikira kwambiri la makampani opanga ma optoelectronics, ndipo ntchito zawo zakhudza mafakitale, kulumikizana kwa mafoni, sayansi, ogula, asilikali ndi ndege. Ndi chitukuko ndi kupita patsogolo kwa ukadaulo, mphamvu, kudalirika ndi mphamvu zosinthira mphamvu za ma laser a semiconductor omwe amatuluka m'mphepete zakula kwambiri, ndipo mwayi wawo wogwiritsa ntchito ndi waukulu kwambiri.
Kenako, ndikukutsogolerani kuti muyamikire kwambiri kukongola kwapadera kwa kutulutsa zinthu m'mbalima laser a semiconductor.

Chithunzi 1 (kumanzere) chithunzi cha laser ya semiconductor yotulutsa mbali ndi (kumanja) chithunzi cha kapangidwe ka laser yoyima pamwamba pa cavity yotulutsa pamwamba

2. Mfundo yogwirira ntchito ya semiconductor yotulutsa mpweya m'mphepetelaser
Kapangidwe ka laser ya semiconductor yotulutsa m'mphepete kangagawidwe m'magawo atatu otsatirawa: dera logwira ntchito la semiconductor, gwero la pampu ndi resonator ya optical. Mosiyana ndi ma resonator a ma laser otuluka pamwamba pa vertical cavity (omwe amapangidwa ndi magalasi a Bragg apamwamba ndi pansi), ma resonator muzipangizo za laser ya semiconductor yotulutsa m'mphepete amapangidwa makamaka ndi mafilimu owoneka mbali zonse ziwiri. Kapangidwe ka chipangizo cha EEL ndi kapangidwe ka resonator kawonetsedwa pa Chithunzi 2. Photon mu chipangizo cha laser ya semiconductor yotulutsa m'mphepete imakulitsidwa ndi kusankha kwa mode mu resonator, ndipo laser imapangidwa motsatira njira yofanana ndi pamwamba pa substrate. Zipangizo za laser ya semiconductor yotulutsa m'mphepete zimakhala ndi ma wavelength ambiri ogwirira ntchito ndipo ndizoyenera kugwiritsa ntchito zambiri zothandiza, kotero zimakhala chimodzi mwa magwero abwino a laser.

Ma index owunikira magwiridwe antchito a ma laser a semiconductor otulutsa m'mphepete amagwirizananso ndi ma laser ena a semiconductor, kuphatikiza: (1) wavelength ya laser yotsika; (2) Threshold current Ith, ndiko kuti, current yomwe laser diode imayamba kupanga laser oscillation; (3) Iop yogwira ntchito yamagetsi, ndiko kuti, driving current pamene laser diode ifika pa rated output power, parameter iyi imagwiritsidwa ntchito pa kapangidwe ndi modulation ya laser drive circuit; (4) Slope efficiency; (5) Vertical divergence Angle θ⊥; (6) Horizontal divergence Angle θ∥; (7) Yang'anirani current Im, ndiko kuti, kukula kwa semiconductor laser chip pa rated output power.

3. Kupita patsogolo kwa kafukufuku wa GaAs ndi GaN based edge emitting semiconductor lasers
Laser ya semiconductor yochokera ku zipangizo za semiconductor za GaAs ndi imodzi mwa ukadaulo wa laser ya semiconductor wokhwima kwambiri. Pakadali pano, ma laser a semiconductor omwe amagwiritsa ntchito GAAS omwe ali pafupi ndi infrared band (760-1060 nm) akhala akugwiritsidwa ntchito kwambiri pamalonda. Monga zinthu za semiconductor za m'badwo wachitatu pambuyo pa Si ndi GaAs, GaN yakhala ikuda nkhawa kwambiri ndi kafukufuku wa sayansi ndi mafakitale chifukwa cha mphamvu zake zabwino zakuthupi ndi zamankhwala. Ndi chitukuko cha zipangizo zamagetsi zochokera ku GAN komanso khama la ofufuza, ma diode otulutsa kuwala ochokera ku GAN ndi ma laser otulutsa kuwala ochokera ku m'mphepete akhala akutukuka kwambiri.