Bayani game da masu daidaita abubuwa guda huɗu na yau da kullun

Bayani game da masu daidaita abubuwa guda huɗu na yau da kullun

Wannan takarda ta gabatar da hanyoyi guda huɗu na daidaitawa (canza girman laser a cikin yankin lokaci na nanosecond ko subnanosecond) waɗanda aka fi amfani da su a cikin tsarin laser fiber. Waɗannan sun haɗa da AOM (acousto-optic modulation), EOM (electro-optic modulation), SOM/SOA(ƙarfafa hasken semiconductor wanda kuma aka sani da daidaitawar semiconductor), da kumagyaran laser kai tsayeDaga cikinsu, AOM,EOMSOM na cikin tsarin daidaitawa na waje, ko kuma tsarin daidaitawa na kai tsaye.

1. Mai daidaita Acousto-optic (AOM)

Daidaitawar Acousto-optic tsari ne na zahiri wanda ke amfani da tasirin acousto-optic don loda bayanai a kan mai ɗaukar haske. Lokacin da ake daidaita haske, ana fara amfani da siginar lantarki (modulation amplitude) ga mai canza wutar lantarki, wanda ke canza siginar lantarki zuwa filin ultrasonic. Lokacin da hasken ya ratsa ta tsakiyar acousto-optic, mai ɗaukar haske yana canzawa kuma ya zama raƙuman ruwa masu ƙarfi waɗanda ke ɗauke da bayanai saboda aikin acousto-optic.

2. Mai daidaita na'urar lantarki(EOM)

Mai daidaita hasken lantarki (electro-optical modulator) wani mai daidaita haske ne wanda ke amfani da tasirin hasken lantarki na wasu lu'ulu'u na lantarki, kamar lu'ulu'u na lithium niobate (LiNb03), lu'ulu'u na GaAs (GaAs) da lu'ulu'u na lithium tantalate (LiTa03). Tasirin hasken lantarki shine lokacin da aka yi amfani da ƙarfin lantarki a kan lu'ulu'u na lantarki, ma'aunin haske na lu'ulu'u na lantarki zai canza, wanda ke haifar da canje-canje a cikin halayen hasken lu'ulu'u, kuma an tabbatar da yanayin yanayin haske, girma, ƙarfi da rarrabuwar siginar gani.

Hoto: Tsarin da'irar direban EOM na yau da kullun

3. Mai ƙara haske na gani na Semiconductor/Mai ƙara haske na gani na Semiconductor (SOM/SOA)

Ana amfani da na'urar ƙara ƙarfin gani ta Semiconductor (SOA) galibi don ƙara ƙarfin siginar gani, wanda ke da fa'idodin guntu, ƙarancin amfani da wutar lantarki, tallafi ga dukkan madaukai, da sauransu, kuma madadin na'urar ƙara ƙarfin gani ta gargajiya kamar EDFA ne a nan gaba (Amplifier fiber mai amfani da Erbium). Na'urar auna haske ta semiconductor (SOM) iri ɗaya ce da na'urar auna haske ta semiconductor, amma yadda ake amfani da ita ya ɗan bambanta da yadda ake amfani da ita da na'urar auna haske ta SOA ta gargajiya, kuma alamun da take mayar da hankali a kansu lokacin da ake amfani da ita azaman na'urar auna haske sun ɗan bambanta da waɗanda ake amfani da su azaman na'urar auna haske. Lokacin da ake amfani da ita don haɓaka siginar gani, yawanci ana ba da wutar lantarki mai ɗorewa ga SOA don tabbatar da cewa SOA tana aiki a yankin layi; Lokacin da ake amfani da ita don daidaita bugun gani, tana shigar da siginar gani mai ci gaba zuwa SOA, tana amfani da bugun lantarki don sarrafa wutar lantarki ta SOA, sannan tana sarrafa yanayin fitarwa na SOA azaman na'urar auna haske/ragewa. Ta amfani da halayen haɓaka haske da ragewa na SOA, an yi amfani da wannan yanayin na'urar aunawa a hankali ga wasu sabbin aikace-aikace, kamar na'urar gane fiber na gani, LiDAR, hoton likita na OCT da sauran fannoni. Musamman ga wasu yanayi waɗanda ke buƙatar babban girma, amfani da wutar lantarki da rabon ƙarewa.

4. Daidaitawar Laser kai tsaye kuma na iya daidaita siginar gani ta hanyar sarrafa wutar laser kai tsaye, kamar yadda aka nuna a cikin hoton da ke ƙasa, ana samun faɗin bugun nanosecond 3 ta hanyar daidaitawa kai tsaye. Ana iya ganin cewa akwai ƙara a farkon bugun, wanda sassautawar mai ɗaukar laser ke haifarwa. Idan kuna son samun bugun na kimanin picoseconds 100, kuna iya amfani da wannan ƙara. Amma yawanci ba ma son samun wannan ƙara.

Taƙaita

AOM ya dace da fitar da wutar lantarki a cikin watts kaɗan kuma yana da aikin canza mita. EOM yana da sauri, amma sarkakiyar tuƙi tana da yawa kuma rabon ƙarewa yana da ƙasa. SOM (SOA) shine mafi kyawun mafita don saurin GHz da babban rabon ƙarewa, tare da ƙarancin amfani da wutar lantarki, ƙarancin amfani da sauran fasaloli. Diodes na laser kai tsaye sune mafita mafi arha, amma ku sani game da canje-canje a cikin halayen spectral. Kowane tsarin daidaitawa yana da nasa fa'idodi da rashin amfani, kuma yana da mahimmanci a fahimci buƙatun aikace-aikacen daidai lokacin zaɓar tsari, kuma ku saba da fa'idodi da rashin amfani na kowane tsari, kuma ku zaɓi tsarin da ya fi dacewa. Misali, a cikin na'urar gano fiber mai rarrabawa, AOM na gargajiya shine babban, amma a wasu sabbin ƙira na tsarin, amfani da tsare-tsaren SOA yana ƙaruwa da sauri, a wasu tsarin iska na gargajiya na DAR suna amfani da AOM mai matakai biyu, sabon ƙirar tsari don rage farashi, rage girman, da inganta rabon ƙarewa, ana amfani da tsarin SOA. A cikin tsarin sadarwa, tsarin ƙarancin gudu yawanci yana ɗaukar tsarin daidaitawa kai tsaye, kuma tsarin babban gudu yawanci yana amfani da tsarin daidaitawa na electro-optic.