Ka'idar aiki na Laser semiconductor

Ka'idar aiki naLaser na semiconductor

Da farko, an gabatar da buƙatun sigogi don laser semiconductor, galibi sun haɗa da waɗannan fannoni:
1. Aikin daukar hoto: gami da rabon karewa, fadin layi mai tsauri da sauran sigogi, waɗannan sigogi suna shafar aikin lasers na semiconductor kai tsaye a cikin tsarin sadarwa.
2. Sigogi na tsarin: kamar girman haske da tsari, ma'anar ƙarshen cirewa, girman shigarwa da girman zane.
3. Tsawon Wave: Tsawon wave na laser semiconductor shine 650 ~ 1650nm, kuma daidaiton yana da yawa.
4. Tsarin wutar lantarki (Ith) da kuma tsarin wutar lantarki (lop): Waɗannan sigogi suna ƙayyade yanayin farawa da yanayin aiki na laser semiconductor.
5. Ƙarfi da ƙarfin lantarki: Ta hanyar auna ƙarfin lantarki, ƙarfin lantarki da kuma wutar lantarki na laser semiconductor a wurin aiki, ana iya zana lanƙwasa PV, PI da IV don fahimtar halayen aikinsu.

Ka'idar aiki
1. Yanayin Samun Karuwa: An kafa rarrabawar juye-juye na masu ɗaukar caji a cikin matsakaiciyar lasing (yankin aiki). A cikin semiconductor, makamashin electrons ana wakilta shi ta hanyar jerin matakan kuzari kusan ci gaba. Saboda haka, adadin electrons a ƙasan madaurin conduction a cikin yanayin makamashi mai girma dole ne ya fi girma fiye da adadin ramuka a saman madaurin valence a cikin yanayin makamashi mai ƙarancin ƙarfi tsakanin yankuna biyu na madaurin makamashi don cimma juyewar lambar barbashi. Ana samun wannan ta hanyar amfani da nuna son kai ga homojunction ko heterojunction da kuma allurar masu ɗaukar nauyi da ake buƙata a cikin layin aiki don tayar da electrons daga ƙaramin madaurin valence zuwa babban madaurin conduction. Lokacin da adadi mai yawa na electrons a cikin yanayin yawan barbashi da aka juya suka sake haɗuwa da ramuka, fitar da hayaki mai motsawa yana faruwa.
2. Domin a sami hasken da ke motsa jiki, dole ne a mayar da hasken da aka motsa sau da yawa a cikin na'urar hangen nesa don samar da walƙiyar laser, ana samar da resonator na laser ta hanyar tsagewar halitta ta lu'ulu'u na semiconductor a matsayin madubi, yawanci ana rufe shi a ƙarshen hasken tare da fim ɗin dielectric mai faɗi da yawa, kuma an rufe saman mai santsi da fim mai rage haske. Don laser semiconductor na Fp (Fabry-Perot cavity), ana iya gina ramin FP cikin sauƙi ta amfani da jirgin tsagewa na halitta wanda ke tsaye a kan layin pn na lu'ulu'u.
(3) Domin samar da tsayayyen juyawa, dole ne na'urar laser ta sami damar samar da isasshen riba don rama asarar gani da resonator ya haifar da kuma asarar da laser ya haifar daga saman ramin, kuma koyaushe yana ƙara filin haske a cikin ramin. Wannan dole ne ya sami isasshen allurar wutar lantarki, wato, akwai isasshen juyawar lambar barbashi, mafi girman matakin juyawar lambar barbashi, mafi girman riba, wato, buƙatar dole ne ta cika wani takamaiman yanayin iyaka na yanzu. Lokacin da laser ya isa iyakar, haske mai takamaiman tsayin tsayi zai iya yin sauti a cikin ramin kuma ya ƙaru, kuma a ƙarshe ya samar da laser da fitarwa mai ci gaba.

Bukatar aiki
1. Tsarin bandwidth da ƙimar daidaitawa: na'urorin laser na semiconductor da fasahar daidaitawarsu suna da mahimmanci a cikin sadarwa ta gani mara waya, kuma tsarin bandwidth da ƙimar daidaitawa suna shafar ingancin sadarwa kai tsaye. Laser ɗin da aka gyara a ciki (laser mai daidaitawa kai tsaye) ya dace da fannoni daban-daban a fannin sadarwa ta fiber optic saboda saurin watsawa da kuma ƙarancin farashi.
2. Halayen Spectral da halayen daidaitawa: Lasers na rabe-raben ra'ayoyin Semiconductor (Laser DFB) sun zama muhimmin tushen haske a cikin sadarwa ta fiber optic da sadarwa ta sararin samaniya saboda kyawawan halayensu na spectral da halayen daidaitawa.
3. Farashi da yawan aiki: Na'urorin laser na Semiconductor suna buƙatar samun fa'idodin ƙarancin farashi da yawan aiki don biyan buƙatun samarwa da aikace-aikace masu yawa.
4. Amfani da wutar lantarki da aminci: A cikin yanayin aikace-aikace kamar cibiyoyin bayanai, na'urorin laser na semiconductor suna buƙatar ƙarancin amfani da wutar lantarki da aminci mai yawa don tabbatar da aiki mai dorewa na dogon lokaci.