Ngenisai-fiber pulsed lasers
Ama-laser we-Fiber Pulsedamadivaysi laserabasebenzisa imicu exutshwe nama-ion omhlaba angavamile (njenge-ytterbium, i-erbium, i-thulium, njll.) njengendlela yokuthola. Ahlanganisa i-gain medium, i-optical resonant cavity, kanye nomthombo wepompo. Ubuchwepheshe bayo bokukhiqiza i-pulse ikakhulukazi buhlanganisa ubuchwepheshe bokushintsha i-Q (izinga le-nanosecond), ukukhiya imodi esebenzayo (izinga le-picosecond), ukukhiya imodi yokwenziwa (izinga le-femtosecond), kanye nobuchwepheshe bokukhulisa amandla e-oscillation (MOPA).
Izicelo zezimboni zihlanganisa ukusika kwensimbi, ukushisela, ukuhlanzwa kwe-laser kanye nokusika kwe-TAB yebhethri ye-lithium endaweni entsha yamandla, enamandla okukhipha amamodi amaningi afinyelela ezingeni lezinkulungwane eziyishumi-watt. Emkhakheni we-lidar, ama-lasers angu-1550nm pulsed, anamandla aphezulu wokushaya kwenhliziyo kanye nezici eziphephile zamehlo, asetshenziswa ezinhlelweni ze-radar ezihlukene nezifakwe emotweni.
Izinhlobo zomkhiqizo eziyinhloko zifaka uhlobo olushintshwayo lwe-Q, uhlobo lwe-MOPA kanye nefayibha enamandla amakhului-pulsed lasers. Isigaba:
1. I-Q-switched fiber laser: Umgomo we-Q-switching ukwengeza idivayisi ekwazi ukulahlekelwa ngaphakathi kwe-laser. Ezikhathini eziningi, i-laser inokulahlekelwa okukhulu futhi cishe akukho okukhiphayo ukukhanya. Esikhathini esifushane kakhulu, ukunciphisa ukulahleka kwedivayisi kwenza i-laser ikwazi ukukhipha ishayela elifushane eliqine kakhulu. I-Q-switched fibre lasers ingafinyelelwa ngokusebenza noma ngokungenzi lutho. Ubuchwepheshe obusebenzayo ngokuvamile buhlanganisa ukungeza imoduli yokuqina ngaphakathi kwendawo ukuze kulawulwe ukulahleka kwelaser. Amasu angenzi lutho asebenzisa izibambisi ezigcwele noma eminye imithelela engaqondile njengokuhlakazeka kwe-Raman okuvuselelwe kanye nokuhlakazeka kwe-Brillouin okugqugquzelwe ukwenza izindlela zokuguquguquka kwe-Q. Ama-pulses ngokuvamile akhiqizwa izindlela zokushintsha i-Q asezingeni le-nanosecond. Uma ama-pulse amafushane azokhiqizwa, angafinyelelwa ngendlela yokukhiya imodi.
2. I-laser ye-fiber ekhiyiwe yemodi: Ingakhiqiza ama-ultrashort pulses ngokusebenzisa izindlela ezisebenzayo zokukhiya noma izindlela zokukhiya imodi yokungenzi lutho. Ngenxa yesikhathi sokuphendula semoduli, ububanzi be-pulse obukhiqizwa ukukhiya kwemodi esebenzayo ngokuvamile busezingeni le-piccosecond. Ukukhiya imodi ye-Passive mode kusebenzisa amadivaysi okukhiya imodi yokwenziwa, anesikhathi sokuphendula esifushane kakhulu futhi angakwazi ukukhiqiza ama-pulses esikalini se-femtosecond.
Nasi isingeniso esifushane somgomo wokukhiya isikhunta.
Kunezindlela eziningi ze-longitudinal endaweni ye-laser resonant cavity. Ngomgodi omise okweringi, isikhawu sefrikhwensi yamamodi obude silingana no-/CCL, lapho u-C kuyisivinini sokukhanya futhi i-CL iwubude bendlela yokukhanya yesiginali ehamba uhambo olulodwa nokubuya ngaphakathi kwendawo. Ngokuvamile, umkhawulokudonsa wokuzuza we-fiber lasers mkhulu uma kuqhathaniswa, futhi inani elikhulu lamamodi e-longitudinal asebenza kanyekanye. Ingqikithi yenani lamamodi i-laser engawafaka lincike esikhaleni semodi ye-longitudinal ∆ν kanye nomkhawulokudonsa wokuzuza we- gain medium. Ukuncane kwesikhawu semodi ye-longitudinal, kuyanda umkhawulokudonsa wokuzuza we-medium, kanye namamodi e-longitudinal ngaphezulu angasekelwa. Ngokuphambene, kancane.
3. I-laser ye-Quasi-continuous (QCW laser) : Kuyimodi yokusebenza ekhethekile phakathi kwama-laser amagagasi aqhubekayo (CW) namalaser ashayayo. Ifinyelela okukhipha amandla ngokushesha okukhulu ngokusebenzisa ama-pulses amade ezikhathi ezithile (umjikelezo womsebenzi ngokuvamile ongu-≤1%) kuyilapho igcina amandla amaphakathi aphansi uma kuqhathaniswa. Ihlanganisa ukuzinza kwama-lasers aqhubekayo nenzuzo ephezulu yamandla yama-lasers ashayekile.
Isimiso sobuchwepheshe: Ama-laser e-QCW alayisha amamojula wokuguquguquka ngokuqhubekayolaserukujikeleza ukusika ama-lasers aqhubekayo abe yi-high duty duty cycle pulse sequences, ukufeza ukushintsha okuguquguqukayo phakathi kwezindlela eziqhubekayo kanye ne-pulse. Isici sayo esiyinhloko yindlela "yokuqhuma kwesikhashana, ukupholisa kwesikhathi eside". Ukupholisa esikhaleni sokushaya kwenhliziyo kunciphisa ukunqwabelana kokushisa futhi kwehlisa ubungozi bokuwohloka kokushisa okubalulekile.
Izinzuzo nezici: Ukuhlanganiswa kwemodi ekabili: Kuhlanganisa amandla aphezulu emodi ye-pulse (afinyelela izikhathi ezingu-10 amandla ajwayelekile wemodi eqhubekayo) nokusebenza kahle okuphezulu nokuzinza kwemodi eqhubekayo. .
Ukusetshenziswa kwamandla okuphansi: Ukusebenza kahle kokuguqulwa kwe-electro-optical okuphezulu kanye nezindleko eziphansi zokusebenzisa isikhathi eside. .
Ikhwalithi ye-Beam: Izinga eliphezulu le-fiber lasers lisekela umshini omncane onembile.
Isikhathi sokuthumela: Nov-10-2025