Iterambere! Laser ya femtosecond ifite imbaraga nyinshi ku isi ifite infrared 3 μm

Iterambere! Ingufu nini cyane ku isi ifite infrared ya 3 μm hagatilaser ya fibre ya femtosecond

Laser ya fibreKugira ngo ugere ku musaruro wa laser yo hagati ya infrared, intambwe ya mbere ni uguhitamo ibikoresho bikwiye bya fiber matrix. Muri laser zo hafi ya infrared, quartz glass matrix niyo fiber matrix ikunze gukoreshwa cyane ifite igihombo gito cyane cyo kohereza, imbaraga zizewe za mekanike kandi ihamye cyane. Ariko, kubera ingufu nyinshi za phonon (1150 cm-1), fibre ya quartz ntishobora gukoreshwa mu kohereza laser yo hagati ya infrared. Kugira ngo laser yo hagati ya infrared igere ku gihombo gito, tugomba kongera guhitamo ibindi bikoresho bya fiber matrix bifite ingufu nke za phonon, nka sulfide glass matrix cyangwa fluoride glass matrix. Fibre ya sulfide ifite ingufu nke za phonon (hafi cm-1 350), ariko ifite ikibazo cy'uko ingano ya doping idashobora kwiyongera, bityo ntikwiriye gukoreshwa nk'inyunganizi mu gukora laser yo hagati ya infrared. Nubwo substrate y'ikirahure cya fluoride ifite ingufu za phonon ziri hejuru gato (550 cm-1) ugereranyije n'ikirahure cya sulfide, ishobora no gutuma habaho ikwirakwizwa rike rya lasers zo mu bwoko bwa infrared mid-infrared zifite uburebure buri munsi ya μm 4. Icy'ingenzi kurushaho, substrate y'ikirahure cya fluoride ishobora kugera ku gipimo cyo hejuru cya ion doping, gishobora gutanga inyungu ikenewe kugira ngo lasers zo mu bwoko bwa infrared mid-infrared zikoreshwe, urugero, fibre ZBLAN ya fluoride imaze igihe kinini kuri Er3+ yashoboye kugera ku gipimo cyo gutanga doping kingana na mol 10. Kubwibyo, matrix y'ikirahure cya fluoride niyo material ya fiber matrix ikwiriye cyane kuri lasers zo mu bwoko bwa infrared mid-infrared.

Vuba aha, itsinda rya Porofeseri Ruan Shuangchen na Porofeseri Guo Chunyu wo muri Kaminuza ya Shenzhen ryakoze femtosecond ikomeye cyanelaser ya fiber itera umuvudukoigizwe na oscillator ya fibre ya 2.8μm ifite mode-locked Er:ZBLAN, single-mode Er:ZBLAN fibre preamplifier na large-mode Er:ZBLAN fibre main amplifier.
Hashingiwe ku nyigisho yo kwiyinjiza no kongera imbaraga z’ingufu zo mu bwoko bwa ultra-short pulse zo mu bwoko bwa mid-infrared zigenzurwa na polarization state hamwe n’imirimo yo kwigana imibare y’itsinda ryacu ry’ubushakashatsi, hamwe n’uburyo bwo kugenzura nonlinear non-linear bwa fibre optique, ikoranabuhanga rikora ryo gukonjesha n’imiterere yo kongera imbaraga z’ipompo ifite impande ebyiri, sisitemu ibona 2.8μm ultra-short pulse output ifite imbaraga mpuzandengo ya 8.12W n’ubugari bwa pulse bwa 148 fs. Urwego rw’ubushakashatsi rwakomeje kongera kuvugurura amateka mpuzamahanga y’imbaraga mpuzandengo nyinshi zagezweho n’iri tsinda ry’ubushakashatsi.

Ishusho ya 1 Ishusho y'imiterere ya laser ya fiber ya Er:ZBLAN ishingiye ku miterere ya MOPA
Imiterere y'ikigolaser ya femtosecondSisitemu igaragara ku Ishusho ya 1. Fibre ya Er:ZBLAN ifite uburebure bwa metero 3.1 yakoreshejwe nk'umuyoboro w'ingufu muri preamplifier ifite igipimo cya doping cya mol. 7% n'umurambararo w'ibanze wa 15 μm (NA = 0.12). Muri amplifier nyamukuru, umuyoboro munini w'ingufu Er:ZBLAN ufite uburebure bwa metero 4 wakoreshejwe nk'umuyoboro w'ingufu ufite igipimo cya doping cya mol. 6% n'umurambararo w'ibanze wa 30 μm (NA = 0.12). Umurambararo munini w'ibanze utuma fibre y'ingufu igira coefficient ntoya kandi ishobora kwihanganira imbaraga nyinshi zo hejuru n'umuvuduko w'ingufu nyinshi zo gutera. Impera zombi za fibre y'ingufu zihujwe n'agapfundikizo ka AlF3.