Umkhuba wokuthuthukiswa kwe-laser encane yobubanzi bomugqa

Umkhuba wokuthuthukiswa kwei-laser yobubanzi bomugqa omncane
Ukuvela kwemodi yempendulo ye-laser ku-laser enobubanzi obuncane kungukuvela kwesakhiwo se-laser resonant cavity. Ngezansi, sizokwethula ukucushwa okuhlukahlukene kobuchwepheshe be-laser enobubanzi obuncane ngokulandelana kokuvela kwe-laser resonators.

1. Ukucushwa kwe-single main cavity. Lolu hlobo lwe-laser lungahlukaniswa lube yi-linear cavity (ukucushwa kwe-classical, isakhiwo esilula nesisebenzayo) kanye ne-annular cavity (ukunqoba ukushiswa kwemigodi yendawo kanye nokusebenzisa insimu yamagagasi okuhambayo). I-non planar ring resonator (NPRO) ikhulunywa ngayo ngqo ku-ring resonator, okuyinsimu yamagagasi okuhamba ekhethekile futhi ezinzile kakhulu.i-laserNgokombono wobude besikhala, singahlukaniswa sibe yizikhala ezimfushane (kulula ukuzisebenzisa imodi eyodwa ye-SLM, kodwa ngobubanzi bomugqa wangaphakathi obanzi nomsindo ophezulu) kanye nezikhala ezinde (ngokwemveloububanzi bomugqa omncane, kodwa ukusebenzisa ukusebenza kwe-SLM kuyinkinga yobuchwepheshe).

2. Ukucushwa kwempendulo yesikhala sangaphandle esisodwa. Lokhu kucushwa kuhlongozwa ukuxazulula izinkinga zesikhathi esifushane sokusebenzisana kwe-photon kanye nokususwa okunzima kokukhishwa okuzenzakalelayo emgodini owodwa oyinhloko, ngokuhlunga nokubuyisela ama-photon emgodini wangaphandle ukuze kucindezelwe ububanzi bomugqa. Izakhiwo zakudala zakuqala zazihlanganisa izikhala zangaphandle zohlobo lweLittrow noLittman Metcalf ezisebenzisa ama-grating. Ubunzima bobuchwepheshe balokhu kucushwa busekufaneni kwesigaba phakathi kwesikhala esiyinhloko nesikhala sangaphandle.
3. Ukulungiswa okubili okuhlanganisiwe kwesikhala esikhulu okusekelwe ku-Bragg gratings:

I-laser ye-DFBukucushwa: Ukuhlanganisa isakhiwo seBragg nesifunda esisebenzayo kanye nokwethula isifunda sokushintsha kwesigaba, kunokuhlanganiswa okuphezulu, ukuzinza kanye nokusebenza kahle, futhi kuthuthukisa ukugeleza kwe-wavelength ye-DBR. Ubunzima bobuchwepheshe busekucubungulweni kwe-grating (njenge-secondary epitaxial RGF-DFB kanye nezindlela ze-surface etching SG-DFB ze-semiconductor DFB).
Ukucushwa kwe-laser ye-DBR: kushintsha izibuko zendabuko ngezakhiwo ze-Bragg ezingasebenzi ngezikhathi ezithile, ezinezici zokuhlunga futhi kulula ukuzisebenzisa i-SLM enezimbobo ezimfushane. Ngokusho kwe-gain medium, ingahlukaniswa ibe yi-semiconductor DBR (enokuhambisana okuhle kwenqubo) kanye ne-fiber DBR (ethembele kubuchwepheshe bokucubungula i-fiber kanye ne-doping).

Ukuze kucindezelwe ububanzi bomugqa wesivalo esifushane esiyinhloko (njenge-DFB/DBR), kuzosetshenziswa isakhiwo sesivalo sangaphandle esihlanganisiwe. Isimo sesivalo sangaphandle sithuthukile ngokuthuthukiswa kobuchwepheshe:
Isikhala sangaphandle sesikhala: izinhlobo zokuqala eziyinhloko, kufaka phakathi i-grating (Littrow/Littman) kanye nezihlungi ezahlukahlukene ze-optical (njenge-FP standard).
I-fibre optic yangaphandle: kusetshenziswa wonke amadivayisi e-fiber optic (njengezifunda ze-fiber optic, ama-FBG, i-fiber optic FP cavities, njll.), ikhono lokuhlanganisa kanye nokulwa nokuphazamiseka linamandla kakhulu.
Umgodi wokuqondisa amagagasi wangaphandle: Ukucubungula i-micro nano okusekelwe ezintweni ze-semiconductor ezifana ne-Si ne-Si3N4, okwenza uhlelo lube luncane futhi luzinzile.

Ekugcineni, lesi sihloko sethula ukucushwa kwama-laser ajikelezayo e-optoelectronic, okuyindlela ekhethekile yokuphendula, njengobuchwepheshe bokuzinzisa imvamisa ye-PDH. Ngokusebenzisa impendulo engemihle kagesi ukukhiya imvamisa ye-laser emthonjeni wokubhekisela ozinzile kakhulu, ukuzinza kwemvamisa ephezulu kakhulu kungafinyelelwa. Kodwa-ke, uhlelo luyinkimbinkimbi, luyabiza, futhi ukuguquguquka kwe-wavelength kunqunyelwe.