High simba femtosecondlaserine kukosha kukuru kwekushandisa mukutsvagisa kwesainzi uye minda yemaindasitiri senge terahertz chizvarwa, attosecond pulse generation uye optical frequency comb.Mod-yakakiyiwa laserszvichibva pane yechinyakare block-gain media inoganhurwa neinopisa lensing mhedzisiro pasimba repamusoro, uye parizvino iyo yakanyanya kubuda simba ingangoita 20 W.
Yakatetepa sheet laser inoshandisa akawanda-pass pombi chimiro kuratidza iyopombi chiedzakune bepa wedzera zviri pakati nepakati neukobvu hwe100 microns yekupfekwa kwepombi inobudirira. Iyo yakanyanya kutetepa kuwana yepakati yakasanganiswa neiyo backcooling tekinoroji inoderedza zvakanyanya pesvedzero yekupisa lens mhedzisiro uye isina mutsara mhedzisiro, uye inogona kuwana yakakwirira simba femtosecond pulse kubuda.
Wafer oscillators akasanganiswa neKerr lens mode-locking tekinoroji ndiyo nzira huru dzekuwana yakakwira avhareji simba laser kubuda ne pulse upamhi mukurongeka kwefemtosecond.
FIG. 1 (a) 72 optical structure diagram uye (b) dhayagiramu yemuviri yepombi module
Chikwata chevaongorori kubva kuChinese Academy yeScience chakagadzira uye kuvaka Kerr lens mode-yakakiyiwa sheet laser yakavakirwa pane yakazvigadzira 72-nzira pombi module, uye yakagadzira Kerr lens mode-yakakiyiwa sheet laser ine avhareji simba repamusoro uye imwe chete. pulse energy muChina.
Zvichienderana nemusimboti weKerr lens mode-locking uye iterative kuverenga kweABCD matrix, timu yekutsvagisa yakatanga kuongorora iyo mode-yekuvhara dzidziso yedete plate Kerr lens mode-locking laser, yakateedzera shanduko yemodhi mune resonator panguva yekukiya-modhi. uye kuenderera mberi kwekushanda, uye yakasimbisa kuti iyo mhango modhi radius pane yakaoma diaphragm ichaderedzwa neinopfuura 7% mushure mekuvhara-modhi.
Zvadaro, vachitungamirirwa nenheyo yekugadzira, boka rekutsvakurudza rakagadzira uye rakavaka Kerr lens mode-locked resonator (FIG. 2) yakabva pa 72-way pump module (FIG.1) yakazvimiririra yakagadzirwa neboka, uye yakawana pulsed laser. kubuda neavhareji simba re 11.78W, kupuruzira hupamhi hwe245 fs uye imwechete pulse simba re 0.14μJ pa 72 W nguva yekupomba. Iyo hupamhi hwekubuda kwepulse uye kusiyanisa kweiyo intracavity mode iri muchibvumirano chakanaka nemhedzisiro yekufananidza.
FIG. 2 Schematic diagiramu ye resonant cavity yeKerr lens mode-yakakiyiwa Yb: YAG wafer laser inoshandiswa mukuyedza.
Kuti uvandudze simba rekubuda relaser, timu yekutsvagisa yakawedzera curvature radius yegirazi inotarisisa, uye yakanyatso gadzirisa Kerr yepakati ukobvu uye yechipiri-yechipiri kupararira. Apo simba repombi rakaiswa ku 94 W, avhareji yekubuda kwesimba yakawedzerwa kusvika ku 22.33 W, uye hupamhi hwepombi hwakanga huri 394 fs uye simba rimwe chete rekupuruzira raiva 0.28 μJ.
Kuti uwedzere kuwedzera simba rekubuda, timu yekutsvagisa ichawedzera kuwedzera curvature radius yeiyo yakatariswa concave girazi pair, ichiisa resonator munzvimbo yakaderera vacuum yakavharwa kuti kuderedze kukanganiswa kwemhepo uye kupararira kwemhepo.
Nguva yekutumira: Aug-15-2023