Kodi amplifier ya semiconductor optical ndi chiyani?

Kodi ndi chiyanisemiconductor kuwala amplifier

Chojambulira cha semiconductor optical ndi mtundu wa chojambulira cha optical chomwe chimagwiritsa ntchito semiconductor gain medium. Chimafanana ndi laser diode, momwe galasi lomwe lili kumapeto kwa chipangizocho limasinthidwa ndi chophimba chowala pang'ono. Kuwala kwa chizindikiro kumatumizidwa kudzera mu semiconductor single-mode waveguide. Dimension yopingasa ya waveguide ndi 1-2 micrometers ndipo kutalika kwake kuli pa 0.5-2mm. Waveguide mode ili ndi kuphatikizika kwakukulu ndi dera logwira ntchito (lokulitsa), lomwe limapopedwa ndi mphamvu. Mphamvu yolowetsedwa imapanga kuchuluka kwa carrier mu conduction band, zomwe zimapangitsa kuti optical band conduction isinthe kupita ku valence band. Kuchuluka kwa peak kumachitika pamene mphamvu ya photon ndi yayikulu pang'ono kuposa mphamvu ya bandgap. SOA optical amplifier nthawi zambiri imagwiritsidwa ntchito m'ma telecommunication systems monga michira ya nkhumba, yokhala ndi wavelength yogwira ntchito pafupifupi 1300nm kapena 1500nm, yomwe imapereka pafupifupi 30dB ya gain.

TheChowonjezera cha kuwala cha semiconductor cha SOAndi chipangizo cholumikizira cha PN chokhala ndi kapangidwe ka chitsime cha quantum. Chikhalidwe chakunja chakutsogolo chimasinthiratu kuchuluka kwa tinthu ta dielectric. Kuwala kwakunja koyambitsa kulowetsedwa, ma radiation olimbikitsidwa amapangidwa, zomwe zimapangitsa kuti zizindikiro za kuwala ziwonjezeke. Njira zonse zitatu zotumizira mphamvu zomwe zili pamwambapa zikhalepo muChokulitsa kuwala cha SOAKuwonjezeka kwa zizindikiro za kuwala kumadalira kutulutsa kolimbikitsidwa. Njira zolimbikitsira kuyamwa ndi kutulutsa kolimbikitsidwa zimakhalapo nthawi imodzi. Kuyamwa kolimbikitsidwa kwa kuwala kwa pampu kungagwiritsidwe ntchito kuti zifulumizitse kuchira kwa zonyamulira, ndipo nthawi yomweyo, pampu yamagetsi imatha kutumiza ma elekitironi ku mulingo wapamwamba wa mphamvu (conduction band). Pamene kuwala kodzidzimutsa kukukulitsidwa, kumapanga phokoso lodzidzimutsa lodzidzimutsa. ‍SOA optical amplifier imachokera ku ma semiconductor chips.

Ma chip a semiconductor amapangidwa ndi ma semiconductor a compound, monga GaAs/AlGaAs, InP/AlGaAs, InP/InGaAsP ndi InP/InAlGaAs, ndi zina zotero. Izi ndi zipangizo zopangira ma laser a semiconductor. Kapangidwe ka waveguide ka SOA ndi kofanana kapena kofanana ndi ka ma laser. Kusiyana kuli m'chakuti ma laser amafunika kupanga cavity yozungulira gain medium kuti apange ndikusunga kugwedezeka kwa chizindikiro cha optical. Chizindikiro cha optical chidzakulitsidwa kangapo mu cavity chisanatulutsidwe.Chokulitsa cha SOA(zomwe tikukambirana pano ndi zongokhudza ma amplifiers oyenda omwe amagwiritsidwa ntchito m'mapulogalamu ambiri), kuwala kumangofunika kudutsa mu gain medium kamodzi kokha, ndipo kuwunikira kumbuyo kumakhala kochepa. Kapangidwe ka SOA amplifier kali ndi madera atatu: Area P, Area I (active layer kapena node), ndi Area N. active layer nthawi zambiri imakhala ndi quantum Wells, zomwe zimatha kusintha mphamvu ya photoelectric conversion ndikuchepetsa threshold current.

Chithunzi 1 Laser ya fiber yokhala ndi SOA yolumikizidwa popanga ma pulses optical

Ikugwiritsidwa ntchito potumiza njira

Ma SOA nthawi zambiri sagwiritsidwa ntchito pongokulitsa mphamvu ya kuwala kokha: angagwiritsidwenso ntchito polumikizana ndi ulusi wa kuwala, ntchito zochokera kuzinthu zopanda mzere monga kuchuluka kwa saturation kapena cross-phase polarization, zomwe zimagwiritsa ntchito kusintha kwa kuchuluka kwa carrier mu SOA optical amplifier kuti zipeze ma refractive indices osiyanasiyana. Zotsatirazi zitha kugwiritsidwa ntchito posintha njira (kusintha kwa mafunde), kusintha kwa mawonekedwe a modulation, kubwezeretsa mawotchi, kukonzanso ma signal ndi kuzindikira mawonekedwe, ndi zina zotero mu ma wavelength division multiplexing systems.

Ndi kupita patsogolo kwa ukadaulo wa optoelectronic integrated circuit komanso kuchepetsa ndalama zopangira, magawo ogwiritsira ntchito a SOA semiconductor optical amplifier ngati ma amplifiers oyambira, zida zogwirira ntchito za optical, ndi zigawo zina za subsystem zipitiliza kukula.