yambitsanifiber pulsed lasers
Fiber Pulsed lasers ndizida za laseromwe amagwiritsa ntchito ulusi wokhala ndi ma ion padziko lapansi osowa (monga ytterbium, erbium, thulium, etc.) monga njira yopezera phindu. Amakhala ndi sing'anga yopeza, cholumikizira chowoneka bwino, ndi gwero la mpope. Ukadaulo wake wopanga ma pulse makamaka umaphatikizapo ukadaulo wa Q-switching (nanosecond level), kutseka modekha (picosecond level), passive mode-lock (femtosecond level), ndi ukadaulo waukulu wa oscillation power amplification (MOPA).
Ntchito mafakitale kuphimba zitsulo kudula, kuwotcherera, laser kuyeretsa ndi lifiyamu batire TAB kudula m'munda mphamvu zatsopano, ndi Mipikisano akafuna linanena bungwe mphamvu kufika mulingo zikwi khumi-Watt. M'munda wa lidar, ma 1550nm pulsed lasers, omwe ali ndi mphamvu zothamanga kwambiri komanso mawonekedwe otetezedwa ndi maso, amagwiritsidwa ntchito pamakina oyambira komanso okwera pamagalimoto.
Mitundu yayikulu yazogulitsa imaphatikizapo mtundu wosinthika wa Q, mtundu wa MOPA ndi ulusi wamphamvu kwambirilasers pulsed. Gulu:
1. Q-switched fiber laser: Mfundo ya Q-kusintha ndikuwonjezera chipangizo chotayika-chosinthika mkati mwa laser. Nthawi zambiri, laser imakhala ndi kutayika kwakukulu ndipo pafupifupi palibe kuwala. M'kanthawi kochepa kwambiri, kuchepetsa kutayika kwa chipangizocho kumathandizira kuti laser ipange kugunda kwamphamvu kwambiri. Ma laser a Q-switched fiber amatha kupezeka mwachangu kapena mwachidwi. Tekinoloje yogwira ntchito nthawi zambiri imaphatikizapo kuwonjezera mphamvu ya modulator mkati mwa patsekeke kuti muchepetse kutayika kwa laser. Njira zopanda ntchito zimagwiritsa ntchito zotsekemera zodzaza kapena zina zosagwirizana ndi mizere monga kulimbikitsa kufalikira kwa Raman ndi kulimbikitsa kumwazikana kwa Brillouin kupanga makina osinthira a Q. Ma pulse omwe amapangidwa ndi njira zosinthira Q ali pamlingo wa nanosecond. Ngati ma pulse afupikitsa apangidwa, amatha kutheka kudzera mu njira yotsekera.
2. Mode-locked fiber laser: Imatha kupanga ma ultrashort pulses kudzera munjira zotsekera kapena njira zotsekera. Chifukwa cha nthawi yoyankha ya modulator, kufalikira kwamphamvu komwe kumapangidwa ndi kutsekeka kogwira ntchito kumakhala pamlingo wa picosecond. Kutseka modekha kumagwiritsa ntchito zida zotsekera, zomwe zimakhala ndi nthawi yochepa kwambiri yoyankha ndipo zimatha kupanga ma pulses pa sikelo ya femtosecond.
Pano pali chiyambi chachidule cha mfundo yotseka nkhungu.
Pali mitundu ingapo yautali wamtundu wa laser resonant cavity. Kwa kabowo kakang'ono ka mphete, nthawi yafupipafupi yamitundu yayitali ndi yofanana ndi / CCL, pomwe C ndi liwiro la kuwala ndi CL ndi kutalika kwa njira ya kuwala koyenda ulendo umodzi wozungulira mkati mwa patsekeke. Nthawi zambiri, kuchuluka kwa bandwidth kwa fiber lasers kumakhala kokulirapo, ndipo mitundu yambiri yotalikirapo imagwira ntchito nthawi imodzi. Chiwerengero chonse cha mitundu yomwe laser ingathe kutengera zimatengera nthawi yayitali ∆ν ndi kuchuluka kwa bandwidth ya sing'anga yopeza. Zing'onozing'ono za nthawi yotalikirapo, kuwonjezereka kwa bandwidth kwa sing'anga, ndipo njira zotalikirapo zimatha kuthandizidwa. Mosiyana, zochepa.
3. Laser ya Quasi-continuous (QCW laser) : Ndi njira yapadera yogwirira ntchito pakati pa ma lasers opitirira (CW) ndi ma pulsed lasers. Imakwaniritsa kutulutsa mphamvu kwanthawi yomweyo kudzera mumayendedwe aatali anthawi ndi nthawi (kuzungulira kwantchito nthawi zambiri ≤1%) ndikusunga mphamvu zochepa. Zimaphatikiza kukhazikika kwa ma lasers opitilira ndi mwayi wapamwamba wamagetsi amagetsi othamanga.
Mfundo yaukadaulo: Ma laser a QCW amanyamula ma module osinthika mosalekezalaserkuzungulira kudula ma lasers opitilira mumayendedwe apamwamba a pulse, kukwaniritsa kusintha kosinthika pakati pamitundu yopitilira ndi kugunda. Cholinga chake chachikulu ndi "kuphulika kwakanthawi kochepa, kuzizira kwa nthawi yayitali". Kuziziritsa kwa kugunda kwapakati kumachepetsa kuchuluka kwa kutentha ndikuchepetsa chiopsezo cha matenthedwe azinthu.
Ubwino ndi mawonekedwe: Kuphatikizika kwamitundu iwiri: Kuphatikizira mphamvu yapamwamba ya pulse mode (mpaka 10 kuwirikiza mphamvu yamagetsi yopitilira) ndikuchita bwino kwambiri komanso kukhazikika kwamayendedwe opitilira. ku
Kugwiritsa ntchito mphamvu pang'ono: Kugwiritsa ntchito mphamvu kwambiri kwa electro-optical komanso kutsika mtengo kwanthawi yayitali. ku
Ubwino wa mtengo: Mapangidwe apamwamba a ma fiber lasers amathandizira kukonza ma micro-machining olondola.
Nthawi yotumiza: Nov-10-2025