Laser y'urupapuro ifunze neza, laser yihuta cyane kandi ifite ingufu nyinshi

Femtosekondi ifite imbaraga nyinshilaserifite akamaro kanini mu bushakashatsi bwa siyansi no mu nganda nko gukora terahertz, gukora attosecond pulse na optical frequency comb.Imashini za laser zifunze nezahashingiwe ku buryo busanzwe bwo gukuraho ibyuma bigabanya ubushyuhe bitewe n’ingufu nyinshi, kandi ubu ingufu ntarengwa zo gutanga ni hafi 20 W.

Laser y'urupapuro rugufi ikoresha imiterere ya pompe ikoresha uburyo bwinshi kugira ngo igaragazeitara rya pompeku gipimo cyo gukuraho sheet gain gifite ubugari bwa mikoroni 100 kugira ngo ikoreshwe neza cyane. Igipimo cyo gukuraho smooth cyane hamwe n'ikoranabuhanga ryo gukonjesha bigabanya cyane ingaruka z'ingufu z'ubushyuhe n'ingaruka zitari z'umurongo umwe, kandi bishobora kugera ku mbaraga nyinshi zo gutanga pulse ya femtosecond.
Oscillators za Wafer zihujwe n'ikoranabuhanga rya Kerr mode-locking ni bwo buryo bw'ingenzi bwo kubona imbaraga nyinshi zikoreshwa na laser hamwe n'ubugari bw'amajwi mu buryo bwa femtosecond.

ISHUSHO YA 1 (a) Ishusho ya 72 y'imiterere y'urumuri na (b) Ishusho nyayo y'imashini ikoresha pompe

Itsinda ry’abashakashatsi bo mu Ishuri Rikuru ry’Ubumenyi ry’Abashinwa ryashushanyije kandi rigakora laser ya Kerr ikoresha uburyo bwa mode-locked sheet ishingiye kuri module ya pompe y’inzira 72 yikoreye ubwayo, kandi ryakoze laser ya Kerr ikoresha uburyo bwa mode-locked sheet ikoresha imbaraga nyinshi cyane hamwe n’ingufu zo gutera inshuro imwe mu Bushinwa.
Hashingiwe ku ihame rya Kerr lens mode-locking hamwe n'ibarwa ryisubiramo rya ABCD matrix, itsinda ry'ubushakashatsi ryabanje gusesengura inyigisho ya mode-locking ya thin plate Kerr lens mode-locking laser, ryigana impinduka za mode muri resonator mu gihe cyo gukora mode-locking no gukomeza gukora, kandi ryemeza ko radius ya cavity mode kuri diaphragm ikomeye izagabanukaho ibirenze 7% nyuma yo gukora mode-locking.

Nyuma yaho, bayobowe n'ihame ry'igishushanyo, itsinda ry'abashakashatsi ryashushanyije kandi rikubaka resonator ya Kerr lens mode-locked (ISHUSHO YA 2) ishingiye kuri module ya pompe ya 72-way (ISHUSHO YA 1) yakozwe n'itsinda ku giti cyabo, maze babona umuvuduko wa laser urimo pulse ufite imbaraga mpuzandengo ya 11.78W, ubugari bwa pulse bwa 245 fs n'ingufu imwe ya pulse ya 0.14μJ ku gihe cyo gupompa cya 72 W. Ubugari bwa pulse isohoka n'impinduka z'uburyo bwo kwinjira mu kanwa bihuye neza n'ibyavuye mu bushakashatsi.

ISHUSHO YA 2 Ishusho y'icyitegererezo cy'umwobo w'urumuri rwa laser ya Kerr ya wafer ya mode-locked Yb:YAG yakoreshejwe mu igerageza

Kugira ngo hongerwe imbaraga zo gusohora za laser, itsinda ry’abashakashatsi ryongereye umurambararo w’indorerwamo igaragara, kandi rinonosora ubugari bw’umurambararo wa Kerr n’uburyo bwo gukwirakwiza ibintu mu buryo bwa kabiri. Ubwo ingufu za pompe zashyirwaga kuri 94 W, imbaraga mpuzandengo zo gusohora zongewe kuri 22.33 W, naho ubugari bwa pulse bwari 394 fs naho ingufu za pulse imwe zari 0.28 μJ.

Kugira ngo bongere imbaraga zo gusohora, itsinda ry’ubushakashatsi rizarushaho kongera uburebure bw’umurambararo w’indorerwamo zicukumbuye, mu gihe rishyira resonator ahantu hafunze neza kugira ngo rikabye ingaruka z’umwuka uhindagurika n’ikwirakwira ry’umwuka.