Ukuphumelela! Amandla aphakeme kakhulu emhlabeni angu-3 μm mid-infrared femtosecond fiber laser

Ukuphumelela! Amandla aphakeme kakhulu emhlabeni angu-3 μm phakathi kwe-infraredfemtosecond fibre laser

I-fiber laserukuze kuzuzwe ukuphuma kwe-laser emaphakathi ne-infrared, isinyathelo sokuqala ukukhetha impahla efanele ye-fiber matrix. Kuma-laser efiber eseduze kwe-infrared, i-quartz glass matrix iyinto ejwayeleke kakhulu ye-fiber matrix enokulahleka kokudlulisela okuphansi kakhulu, amandla emishini athembekile nokuzinza okuhle kakhulu. Kodwa-ke, ngenxa yamandla ephonon aphezulu (1150 cm-1), i-quartz fiber ayikwazi ukusetshenziselwa ukudluliswa kwe-laser ephakathi kwe-infrared. Ukuze sizuze ukudluliswa kokulahlekelwa okuphansi kwelaser emaphakathi ne-infrared, sidinga ukukhetha kabusha ezinye izinto zefiber matrix ezinamandla aphansi wephonon, njenge-sulfide glass matrix noma i-fluoride glass matrix. I-Sulfide fiber inamandla ephonon aphansi kakhulu (cishe ama-350 cm-1), kodwa inenkinga yokuthi ukugxila kwe-doping akukwazi ukukhuphuka, ngakho-ke ayifanele ukusetshenziswa njengefayibha yokuthola ukukhiqiza i-laser ephakathi kwe-infrared. Yize i-substrate yengilazi ye-fluoride inamandla ephonon aphakeme kancane (550 cm-1) kune-substrate yengilazi ye-sulfide, ingaphinda ithole ukudluliselwa kokulahlekelwa okuphansi kwama-lases amaphakathi ne-infrared anobude obungaphansi kuka-4 μm. Okubaluleke nakakhulu, i-substrate yengilazi ye-fluoride ingafinyelela ukugxila okuphezulu kwe-ion doping yomhlaba, okungahlinzeka ngenzuzo edingekayo ekukhiqizeni i-laser ephakathi kwe-infrared, isibonelo, i-fluoride evuthwe kakhulu i-ZBLAN fiber ye-Er3+ ikwazile ukufeza ukuhlushwa kwe-doping kuze kufike ku-10 mol. Ngakho-ke, i-fluoride glass matrix iyinto efanelekile kakhulu yefiber matrix kumalaser efiber ephakathi kwe-infrared.

Muva nje, ithimba likaSolwazi Ruan Shuangchen kanye noProfessor Guo Chunyu e-Shenzhen University bathuthukise i-femtosecond enamandla amakhulu.i-pulse fiber laseryakhiwe nge-Er yemodi ekhiyiwe engu-2.8μm:I-oscillator yefayibha ye-ZBLAN, i-Er yemodi eyodwa:i-ZBLAN i-fiber preamplifier kanye nenkambu yemodi enkulu Er:I-ZBLAN fiber main amplifier.
Ngokusekelwe kumbono wokuzicindezela kanye ne-amplification we-mid-infrared ultra-short pulse elawulwa yisimo se-polarization kanye nomsebenzi wokulingisa izinombolo weqembu lethu locwaningo, kuhlanganiswe nokucindezelwa okungaqondile nezindlela zokulawula imodi ye-fiber optical yemodi enkulu, ubuchwepheshe bokupholisa obusebenzayo kanye nokukhulisa isakhiwo sephampu eneziphetho ezimbili, isistimu ithola ukukhishwa kwe-pulse ultra-short engu-2.8μm ngamandla aphakathi angu-8.12W kanye nobubanzi be-pulse engu-148 fs. Irekhodi lamazwe ngamazwe lesilinganiso esiphezulu samandla azuzwe yileli qembu locwaningo lavuselelwa nakakhulu.

Umfanekiso 1 Umdwebo wesakhiwo se-Er:ZBLAN fibre laser esekelwe esakhiweni se-MOPA
Isakhiwo se-i-laser ye-femtoseconduhlelo luboniswa kuMfanekiso 1. I-Er yemodi eyodwa ene-double-clad Er:ZBLAN fibre yobude obuyi-3.1 m yasetshenziswa njengefayibha ezuzisayo ku-preamplifier ene-doping concentration engu-7 mol.% kanye nobubanzi obuyingqikithi buka-15 μm (NA = 0.12). Ku-amplifier eyinhloko, inkambu yemodi enkulu egqoke kabili i-Er:ZBLAN fiber enobude obungu-4 m isetshenziswe njengefayibha yokuzuza ene-doping concentration ye-6 mol.% kanye nobubanzi obuyingqikithi buka-30 μm (NA = 0.12). I-diameter eyinhloko ekhudlwana yenza i-fiber yenzuzo ibe ne-coefficient ephansi engaqondile futhi ingamelana namandla aphezulu aphezulu kanye nokukhishwa kwe-pulse yamandla amakhulu we-pulse. Zombili iziphetho zefayibha yenzuzo zihlanganiswe nekhephu yetheminali ye-AlF3.