Chidule cha chitukuko cha laser ya semiconductor yamphamvu kwambiri gawo loyamba

Chidule cha mphamvu yayikululaser ya semiconductorgawo loyamba la chitukuko

Pamene magwiridwe antchito ndi mphamvu zikupitirira kukula, ma laser diode (dalaivala wa diode ya laser) idzapitiriza kusintha ukadaulo wachikhalidwe, motero kusintha momwe zinthu zimapangidwira ndikupangitsa kuti zinthu zatsopano zipangidwe. Kumvetsetsa kusintha kwakukulu kwa ma laser amphamvu kwambiri a semiconductor lasers nakonso kuli kochepa. Kusintha kwa ma elekitironi kukhala ma lasers kudzera mu ma semiconductors kunawonetsedwa koyamba mu 1962, ndipo kupita patsogolo kosiyanasiyana kwatsatira komwe kwatsogolera kupita patsogolo kwakukulu pakusintha kwa ma elekitironi kukhala ma laser opanga zinthu zambiri. Kupita patsogolo kumeneku kwathandizira ntchito zofunika kuyambira pakusungira kuwala mpaka kulumikizana kwa kuwala kupita kumadera osiyanasiyana amafakitale.

Kuwunikanso kupita patsogolo kumeneku ndi kupita patsogolo kwawo konsekonse kukuwonetsa kuthekera kwa zotsatira zazikulu komanso zofala kwambiri m'magawo ambiri azachuma. Ndipotu, ndi kusintha kosalekeza kwa ma laser amphamvu kwambiri, gawo logwiritsira ntchito lidzafulumizitsa kukula, ndipo lidzakhudza kwambiri kukula kwachuma.

Chithunzi 1: Kuyerekeza kwa kuwala ndi lamulo la Moore la ma laser amphamvu kwambiri a semiconductor

Ma lasers olimba opompedwa ndi diode ndima laser a ulusi

Kupita patsogolo kwa ma laser a semiconductor amphamvu kwambiri kwathandizanso kuti pakhale chitukuko cha ukadaulo wa laser wotsatira, komwe ma laser a semiconductor nthawi zambiri amagwiritsidwa ntchito kusonkhezera makristalo opangidwa ndi diode-pumped solid-state lasers kapena ma fiber fibers (ma laser a fiber).

Ngakhale kuti ma laser a semiconductor amapereka mphamvu ya laser yogwira ntchito bwino, yaying'ono, komanso yotsika mtengo, alinso ndi zofooka ziwiri zazikulu: sasunga mphamvu ndipo kuwala kwawo kumakhala kochepa. Mwachidule, ntchito zambiri zimafuna ma laser awiri othandiza; Limodzi limagwiritsidwa ntchito kusintha magetsi kukhala laser emission, ndipo linalo limagwiritsidwa ntchito kuwonjezera kuwala kwa emission imeneyo.

Ma laser olimba opangidwa ndi diode.
Kumapeto kwa zaka za m'ma 1980, kugwiritsa ntchito ma laser a semiconductor popopera ma laser a solid-state kunayamba kukhala ndi chidwi chachikulu pamalonda. Ma laser a solid-state opompedwa ndi diode (DPSSL) amachepetsa kwambiri kukula ndi zovuta za machitidwe oyendetsera kutentha (makamaka ma cycle coolers) ndi ma gain modules, omwe kale anali kugwiritsa ntchito nyali za arc popopera makristasi a laser a solid-state.

Kutalika kwa mafunde a laser ya semiconductor kumasankhidwa kutengera momwe ma spectral absorption amagwirizanirana ndi gain medium ya laser ya solid-state, zomwe zimatha kuchepetsa kwambiri kutentha poyerekeza ndi wideband emission spectrum ya arc lamp. Poganizira kutchuka kwa ma neodymium-doped lasers omwe amatulutsa mafunde a 1064nm, 808nm semiconductor laser yakhala chinthu chopambana kwambiri pakupanga ma laser a semiconductor kwa zaka zoposa 20.

Kugwira bwino ntchito kwa diode pumping kwa m'badwo wachiwiri kunatheka chifukwa cha kuwala kwa ma multi-mode semiconductor lasers komanso kuthekera kokhazikitsa mizere yopapatiza yotulutsa pogwiritsa ntchito bulk Bragg gratings (VBGS) pakati pa zaka za m'ma 2000. Makhalidwe ofooka komanso opapatiza a spectral absorption a pafupifupi 880nm apangitsa chidwi chachikulu pa ma spectrally stable high brightness pump diodes. Ma lasers apamwamba awa amapangitsa kuti zikhale zotheka kupopera neodymium mwachindunji pamlingo wapamwamba wa laser wa 4F3/2, kuchepetsa kuchepa kwa quantum ndikuwonjezera kutulutsa kwa fundamental mode pamphamvu yayikulu, yomwe ikadakhala yocheperako ndi ma thermal lens.

Pofika kumayambiriro kwa zaka khumi za m'ma 2000, tinkawona kuwonjezeka kwakukulu kwa mphamvu mu ma laser a single-transverse mode 1064nm, komanso ma laser awo osinthira pafupipafupi omwe amagwira ntchito mu ma wavelengths owoneka ndi a ultraviolet. Popeza mphamvu yayitali ya Nd: YAG ndi Nd: YVO4 imakhala ndi moyo wautali, ma DPSSL Q-switched operations awa amapereka mphamvu yayikulu ya pulse ndi mphamvu yayikulu, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsa ntchito zinthu zogwiritsidwa ntchito komanso kugwiritsa ntchito ma micromachining molondola kwambiri.