Urupapuro rufunze uburyo bwa laser, imbaraga nyinshi ultrafast laser

Imbaraga nyinshi femtosekondlaserIfite agaciro gakomeye mubushakashatsi bwa siyanse ninganda nka terahertz generation, attosecond pulse generation na optique frequency comb.Moderi ifunzehashingiwe kumigenzo gakondo yunguka itangazamakuru rigarukira kumasoko yumuriro mwinshi, kandi kuri ubu ingufu ntarengwa zisohoka ni 20 W.

Urupapuro ruto cyane rukoresha pompe ya pompe yuburyo bugaragazapompe itarakurupapuro rwunguka hagati yubunini bwa microne 100 kugirango pompe ikorwe neza. Inyungu yoroheje cyane ihujwe hamwe na tekinoroji ya backcooling igabanya cyane ingaruka zingaruka za lens yumuriro ningaruka zidafite umurongo, kandi irashobora kugera kumasoko menshi ya femtosekond pulse.
Wafer oscillator ihujwe na Kerr lens uburyo bwo gufunga tekinoroji nuburyo nyamukuru bwo kubona ingufu zingana zingana na laser isohoka hamwe nubugari bwa pulse muburyo bwa femtosekond.

FIG. 1 (a) Igishushanyo mbonera cya 72 na (b) igishushanyo mbonera cya pompe module

Itsinda ry’abashakashatsi bo mu Ishuri Rikuru ry’Ubushinwa ryashushanyije kandi ryubaka uburyo bwa Kerr lens moderi ifunze urupapuro rwa laser rushingiye ku buryo bwonyine bwateje imbere inzira ya pompe ya pompe 72, maze bakora imashini yerekana uburyo bwa Kerr lens ifunze urupapuro rufite ingufu zingana kandi zingana. ingufu za pulse mu Bushinwa.
Hashingiwe ku ihame rya Kerr lens uburyo bwo gufunga no kubara itera ya matrise ya ABCD, itsinda ry’ubushakashatsi ryabanje gusesengura uburyo bwo gufunga uburyo bworoshye bwa plaque yoroheje ya Kerr lens uburyo bwo gufunga laser, bigana impinduka zuburyo muri resonator mugihe cyo gufunga uburyo nigikorwa gikomeza, kandi yemeza ko cavity mode ya radiyo kuri diaphragm ikomeye izagabanuka kurenga 7% nyuma yuburyo bwo gufunga.

Nyuma, iyobowe nihame ryogushushanya, itsinda ryubushakashatsi ryateguye kandi ryubaka uburyo bwa Kerr lens moderi ifunze resonator (FIG. 2) ishingiye kumasomo ya pompe yinzira 72 (FIG.1) yigenga yigenga nitsinda, maze ibona laser ya pulsed. ibisohoka bifite impuzandengo ya 11,78W, ubugari bwa pulse ya 245 fs nimbaraga imwe ya 0.14μJ mugihe cyo kuvoma 72 W. Ubugari bwibisohoka pulse hamwe nuburyo butandukanye bwimikorere idahuye neza nibisubizo byigana.

FIG. Igishushanyo mbonera cya cavant ya resonant ya Kerr lens uburyo bwafunzwe Yb: YAG wafer laser yakoreshejwe mubushakashatsi

Kugirango tunonosore ingufu za lazeri, itsinda ryubushakashatsi ryongereye umurongo wa curvature ya radiyo yibanda, kandi uhuza neza uburebure bwa Kerr buringaniye hamwe no gutondekanya kabiri. Iyo ingufu za pompe zashyizwe kuri 94 W, impuzandengo yo gusohora yongerewe kugera kuri 22.33 W, naho ubugari bwimpiswi bwari 394 fs naho ingufu za pulse imwe yari 0.28 μJ.

Kugirango turusheho kongera ingufu zisohoka, itsinda ryubushakashatsi rizakomeza kongera umurongo wa curvature ya radiyo yibirahure yibirindiro, mugihe ushyira resonator ahantu hafunguye icyuho gito kugirango bigabanye ingaruka zo guhungabanya ikirere no gukwirakwiza ikirere.