Namuhla, sizokwethula i-laser "ye-monochromatic" eya e-Extreme - Marrow Linewidth Laser. Ukuvela kwalo kugcwalisa izikhala emikhakheni eminingi yezicelo ze-laser, futhi eminyakeni yamuva kusetshenziswe kabanzi ekutholweni kwe-gravitational wave ukutholwa, i-lidar, kusatshalaliswa ukucophelela okubumbene, okungukuthi ezinye izinkambu, okungukuthi "ukuthunywa" okungaqediwe kuphela ngokwenza ngcono amandla we-laser.
Yini i-linewidth ye-linewidth?
Igama elithi "Ububanzi beLine" libhekisela kulayini wokubuka ububanzi be-laser esizindeni esivaliwe, okuvame ukulinganiswa ngokuya ngobubanzi obugcwele be-spectrum (FWHM). I-linewidth ithinteka ikakhulukazi ngemisebe ezenzakalelayo yama-athomu ajabulisayo noma ama-ion, umsindo wesigaba, ukudlidliza kwemishini komthengisi, izinga lokushisa le-jitter nezinye izinto zangaphandle. Uma lincane inani lobubanzi be-Line, likhuphuka ubumsulwa be-spectrum, okungukuthi, okungcono kwe-monochromatity ye-laser. Ama-Lasers anezici ezinjalo ngokuvamile anesigaba esincane kakhulu noma umsindo wemvamisa kanye nomsindo omncane kakhulu wokuqina. Ngasikhathi sinye, incane inani lobubanzi obubanzi be-laser, elinamandla okuhambisana nalo, elibonakaliswa njengobude obude kakhulu bokuhambisana.
Ukuqaphela nokusetshenziswa kwe-linewidth ye-Marrwidth Laser
Inqunyelwe yi-Linewidwidth yemvelo ye-Laser ye-Laser, cishe akunakwenzeka ukuthi uqaphele ngokuqondile umphumela we-Linewidth Laser ngokuncika kwi-Oscillator yendabuko uqobo. Ukuze ubone ukusebenza kwe-linewidth ye-Marthwidth Laser, kuvame ukudingekile ukusebenzisa izihlungi, i-grating namanye amadivaysi okukhawulela noma ukhethe imodi yokuthola inzuzo ende phakathi kwezindlela ezinde noma eyodwa kuphela ye-oscillal embalwa noma eyodwa kuphela ye-oscillator e-laser resonator. Kule nqubo, kuvame ukudingekile ukulawula ithonya lomsindo kokukhishwa kwe-laser, futhi unciphise ukukhiqizwa kwemigqa yokubuka okubangelwa ukuguqulwa kokudlidliza kwemvelo yangaphandle; Ngasikhathi sinye, futhi kungahlanganiswa nokuhlaziywa kwesigaba noma imvamisa umsindo wokubuka ubuhle ukuze uqonde umthombo womsindo nokwandisa umklamo we-laser, ukuze uzuze umkhawulo we-laser we-linewidth.
Ake sibheke ukugcwaliseka kokusebenza okuncane kwe-linewidth yezigaba eziningana zama-lasers.
Ama-Semiconductor Lasers anezinzuzo zobukhulu obuhle, ukusebenza kahle okuphezulu, impilo ende kanye nezinzuzo zezomnotho.
I-Fabry-Perot (FP) i-optical resonator esetshenziswa ngokwesikoAma-Semiconductor Lasersgenerally oscillates in multi-longitudinal mode, and the output line width is relatively wide, so it is necessary to increase the optical feedback to obtain the output of narrow line width.
Impendulo esetshenzisiwe (i-DFB) futhi isatshalaliswe i-Bragg Reflection (DBR) iyi-secconductor evamile ye-semiconductor ye-semiceback. Ngenxa ye-pitch encane ye-grating kanye nokukhethwa okuhle kwe-wavelength, kulula ukufezekisa umphumela ojwayelekile we-line-frequency incanewwidth. Umehluko omkhulu phakathi kwalezi zinhlaka ezimbili isikhundla se-grating: Isakhiwo se-DFB sivame ukusabalalisa ukwakheka kwezikhathi ze-bragg grating kulo lonke elakhiweyo, futhi umsele we-DBR uvame ukwakhiwa ngesakhiwo se-refling kanye nesifunda sokubuyisa esihlanganisiwe endaweni yokugcina. Ngaphezu kwalokho, i-DFB Lasers isebenzisa ukuneliseka okushumekiwe nge-Index Resupative Index Surtast kanye nokuthengwa okuphansi. Ama-DBR Lasers asebenzisa ukuneliseka okungaphezulu kwenkomba ephakeme evunyiwe nokuqhathanisa okuphezulu. Zombili lezi zinhlaka zinebanga elikhulu lamahhala lokubuka futhi zingenza i-wavengeth tuning ngaphandle kwemodi egxume ebangeni lama-nanometer ambalwa, lapho i-DBR Laser inebanga elibanzi lokuhleleka kuneI-DFB laser. Ngaphezu kwalokho, ubuchwepheshe be-cavity beptical report yangaphandle, esebenzisa izinto zokubona zangaphandle ukuze baphendule ukukhanya okuphumayo kwe-seconductor laser chip bese ukhetha imvamisa, ungabona nokusebenza okuncane kwe-linewidth ye-semicenductor laser.
(2) I-Fiber Lasers
I-Fibre Lasers inokusebenza kahle kwe-pump yokuguqulwa kwe-pump, ikhwalithi enhle kanye nokusebenza kahle okuphezulu, okuyizihloko zokucwaninga ezishisayo ensimini ye-laser. Ngokwesimo seminyaka yolwazi, ama-fiber lasers anokuhambisana okuhle nezinhlelo zamanje zokuxhumana ze-fiber emakethe. I-librecy ye-licen-frequency fiber enezinzuzo zomugqa omncane ububanzi, umsindo ophansi kanye nokuhlangana okuhle sekusenye yezindlela ezibalulekile zokuthuthuka kwayo.
Ukusebenza kwemodi eyodwa ye-Longitudinal kungumongo we-fiber laser ukufezekisa okukhipha umugqa omncane, ngokuvamile ngokuya ngesakhiwo somthengisi we-resonator ye-litemleency fiber laser laser, ihlukaniswe ngohlobo lwe-DFB, uhlobo lwe-DBR kanye ne-ring. Phakathi kwazo, umgomo osebenzayo we-DFB kanye ne-DBR-frequency fiber lasers ufana neye-DFB ne-DBR semiconductor lasers.
Njengoba kukhonjisiwe kuMdwebo 1, i-DFB fiber laser ukubhala ukusatshalaliswa kwe-bragg gazing kufayibha. Ngoba i-waveaft esebenzayo ye-Oscillator ithintekile isikhathi se-fiber, imodi ende ende ingakhethwa ngempendulo esatshalaliswa ye-grating. Umthengisi we-laser we-DBR Laser uvame ukwakhiwa yi-pair of fiber Bragg ukuneliseka, kanti imodi eyodwa ende endeitudinal ikhethwe yibhande elincanyana kanye nokugcwaliseka okuphansi kwe-fiber bragg. Kodwa-ke, ngenxa yomthengisi wayo omude, ukwakheka okuyinkimbinkimbi kanye nokuntuleka kwempahla esebenzayo yokubandlulula, umthambo omiswe yindandatho uthambekele kwimodi ye-hopping, futhi kunzima ukusebenza ngokungxeke kumodi ende ende isikhathi eside.
Umdwebo 1, izakhiwo ezimbili ezijwayelekile zemvamisa yemvamisa eyodwaI-Fibre Lasers
Isikhathi sePosi: Nov-27-2023