Femtosecond ine simba gurulaserInobatsira zvikuru mukutsvaga kwesainzi uye mumaindasitiri akadai sekugadzira terahertz, kugadzira attosecond pulse uye optical frequency comb.Malaser akakiyiwa neModZvichibva pamidziyo yemazuva ano ye block-gain media, zvinogumira pakushandiswa kwe thermal lensing effect pamagetsi akakwira, uye pari zvino simba guru rekuburitsa magetsi rinenge 20 W.
Laser yakatetepa inoshandisa chimiro chepombi ine mapombi akawanda kuti iratidzerambi repombikusvika pa sheet gain medium ine ukobvu hwema microns zana (100 microns) kuti pombi inyatsoshanda zvakanaka. Iyo gain medium yakatetepa zvikuru pamwe chete ne backcooling tekinoroji inoderedza zvakanyanya simba re thermal lens effect uye nonlinear effect, uye inogona kuwana simba rakawanda re femtosecond pulse output.
MaWafer oscillators pamwe chete neKerr lens mode-locking technology ndiyo nzira huru yekuwana simba repamusoro re laser rinobuda nehupamhi hwepulse hwakafanana nefemtosecond.
Mufananidzo 1 (a) 72 dhayagiramu yechimiro chemaziso uye (b) dhayagiramu chaiyo yemodule yepombi
Chikwata chevaongorori vanobva kuChinese Academy of Sciences chakagadzira nekuvaka Kerr lens mode-locked sheet laser zvichibva pa 72-way pump module yakagadzirwa nega, uye vakagadzira Kerr lens mode-locked sheet laser ine simba repamusoro-soro uye simba rekurova kwemoyo rimwe chete muChina.
Zvichibva panheyo yeKerr lens mode-locking uye kuverenga kweABCD matrix zvakare, timu yekutsvagisa yakatanga yaongorora dzidziso yemode-locking yethin plate Kerr lens mode-locking laser, yakatevedzera shanduko dzemode mu resonator panguva yekushanda kwemode-locking uye kushanda nguva dzose, uye yakasimbisa kuti cavity mode radius pa hard diaphragm ichaderedzwa neinopfuura 7% mushure memode-locking.
Zvadaro, vachitungamirirwa nepfungwa yekugadzira, timu yekutsvagisa yakagadzira nekuvaka Kerr lens mode-locked resonator (Mufananidzo 2) zvichibva pa 72-way pump module (Mufananidzo 1) yakagadzirwa nechikwata ichi, uye yakawana pulsed laser output ine avhareji yesimba re 11.78W, pulse width ye 245 fs uye single pulse energy ye 0.14μJ panguva yekupomba ye 72 W. Upamhi hwe output pulse uye shanduko ye intracavity mode zvinoenderana zvakanaka nemigumisiro ye simulation.
Mufananidzo 2. Dhayagiramu yemufananidzo we resonant cavity yeKerr lens mode-locked Yb:YAG wafer laser yakashandiswa mukuyedza.
Kuti vawedzere simba rekuburitsa relaser, timu yekutsvagisa yakawedzera curvature radius yegirazi rinotarisisa, uye vakagadzirisa ukobvu hwepakati nepakati hweKerr uye kupararira kwechipiri. Simba repombi parakaiswa pa94 W, avhareji yesimba rekuburitsa yakawedzerwa kusvika pa22.33 W, uye upamhi hwepulse hwaive 394 fs uye simba repulse rimwe chete raive 0.28 μJ.
Kuti vawedzere simba rekuburitsa, timu yekutsvagisa ichawedzerawo curvature yegirazi rakanangana ne concave, ukuwo ichiisa resonator munzvimbo isina vacuum yakawanda kuti ideredze kukanganiswa kwemhepo uye kupararira kwemhepo.
Nguva yekutumira: Nyamavhuvhu-15-2023