Mmepụta! Ike kacha elu n'ụwa 3 μm etiti infrared femtosecond fiber laser

Mmepụta! Ike kacha elu n'ụwa 3 μm etiti infraredfemtosecond eriri laser

Fiber laseriji nweta mmepụta laser etiti infrared, nzọụkwụ mbụ bụ ịhọrọ ihe matriks fiber kwesịrị ekwesị. Na nso-infrared eriri lasers, quartz iko matrix bụ ihe kasị nkịtị eriri matriks ihe onwunwe na nnọọ ala nnyefe ọnwụ, a pụrụ ịdabere na n'ibu ike na magburu onwe nkwụsi ike. Agbanyeghị, n'ihi ike phonon dị elu (1150 cm-1), enweghị ike iji eriri quartz maka nnyefe laser etiti infrared. Iji nweta obere nnyefe nke laser etiti infrared, anyị kwesịrị ịhọrọghachi ihe ndị ọzọ fiber matrix nwere ike phonon dị ala, dị ka matrix sulfide glass matrix fluoride. Sulfide fiber nwere ike phonon kacha ala (ihe dị ka 350 cm-1), mana ọ nwere nsogbu na enweghị ike ịbawanye ntinye doping, yabụ na ọ naghị adabara iji dị ka eriri enwetara iji mepụta laser etiti infrared. Ọ bụ ezie na mkpụrụ osisi fluoride nwere ike phonon dịtụ elu (550 cm-1) karịa mkpụrụ iko sulfide, ọ nwekwara ike nweta nnyefe dị ala maka lasers etiti infrared nwere ogologo ogologo na-erughị 4 μm. Nke kachasị mkpa, mkpụrụ nke iko fluoride nwere ike nweta mkpokọta ion doping dị elu nke ụwa, nke nwere ike inye uru achọrọ maka ọgbọ laser infrared, dịka ọmụmaatụ, eriri fluoride ZBLAN kachasị tozuru oke maka Er3 + enweela ike nweta mkpokọta doping. ruo 10 mol. Ya mere, fluoride iko matrix bụ ihe kasị adabara eriri matrix ihe maka etiti-infrared fiber lasers.

Na nso nso a, otu Prọfesọ Ruan Shuangchen na Prọfesọ Guo Chunyu na Mahadum Shenzhen mepụtara femtosecond dị elu.pulse eriri lasermejupụtara 2.8μm mode-kpọchiri Er:ZBLAN fiber oscillator, single mode Er:ZBLAN fiber preamplifier na nnukwu ọnọdụ ubi Er:ZBLAN fiber main amplifier.
Dabere na nke onwe mkpakọ na nkwalite tiori nke etiti infrared ultra-short pulse na-achịkwa site na polarization steeti na ọrụ ịme anwansị nke ìgwè nyocha anyị, jikọtara ya na nkwụsịtụ na-adịghị na ntanetị na usoro njikwa ọnọdụ nke nnukwu eriri ngwa anya, teknụzụ na-ekpo ọkụ na-arụ ọrụ na nkwalite. Ọdịdị nke mgbapụta okpukpu abụọ, usoro ahụ na-enweta 2.8μm ultra-short pulse mmepụta na nkezi ike nke 8.12W na obosara usu nke 148 fs. Ihe ndekọ mba ụwa nke ike kachasị elu nke otu nyocha a nwetara nwetara ume ọzọ.

Ọgụgụ 1 Ọdịdị Eserese nke Er:ZBLAN fiber laser dabere na usoro MOPA
Ọdịdị nkefemtosecond laserE gosipụtara usoro na eserese 1. A na-eji otu-mode okpukpu abụọ nke Er: ZBLAN fiber nke 3.1 m ogologo na-eji dị ka eriri uru na preamplifier na ntinye doping nke 7 mol.% na isi nke 15 μm (NA = 0.12). Na isi ampilifaya, a okpukpu abụọ clad nnukwu mode ubi Er:ZBLAN fiber na ogologo nke 4 m ka eji eri uru na a doping ịta nke 6 mol.% na a isi dayameta nke 30 μm (NA = 0.12). The ibu isi dayameta na-eme ka uru eriri nwere ala nononlinear ọnụọgụ na ike idi elu elu ike na pulse mmepụta nke ibu usu ume. Ejikọtara ngwụcha abụọ nke eriri uru ahụ na okpu ọdụ AlF3.