I-laser yeshiti etshixiweyo ngendlela, i-laser enamandla aphezulu ekhawulezayo

I-femtosecond enamandla aphezuluilezaIxabiso layo liphezulu kakhulu kuphando lwesayensi nakwiindawo zoshishino ezifana nokuveliswa kwe-terahertz, ukuveliswa kwe-attosecond pulse kunye ne-optical frequency comb.Iileser ezitshixiweyo zeModNgokusekelwe kwimidiya yemveli yokuzuza ibhloko, inqunyelwe yimpembelelo yelensi yobushushu kumandla aphezulu, kwaye okwangoku amandla aphezulu okukhupha amalunga nama-20 W.

I-laser yeshiti encinci isebenzisa isakhiwo sepompo esidlula ngeendlela ezininzi ukuze sibonakaliseisibane sepompokwi-sheet gain medium enobukhulu obuyi-100 microns ukuze kufunxwe ipompo ngokukuko. I-gain medium encinci kakhulu edityaniswe netekhnoloji yokupholisa inciphisa kakhulu impembelelo yelensi yobushushu kunye nempembelelo engeyiyo emgceni, kwaye inokufezekisa amandla aphezulu okukhupha i-femtosecond pulse.
Ii-oscillator ze-wafer ezidityaniswe netekhnoloji ye-Kerr lens mode-locking zezona ndlela ziphambili zokufumana amandla aphezulu okukhupha i-laser enobubanzi be-pulse ngokolandelelwano lwe-femtosecond.

UMZOBO 1 (a) Umzobo wesakhiwo se-optical 72 kunye (b) nomzobo obonakalayo wemodyuli yepompo

Iqela labaphandi abavela kwi-Chinese Academy of Sciences bayila kwaye bakha i-Kerr lens mode-locked sheet laser esekelwe kwi-72-way pump module eyenzelwe yona, kwaye baphuhlisa i-Kerr lens mode-locked sheet laser enamandla aphakathi aphezulu kunye namandla e-single pulse eTshayina.
Ngokusekelwe kumgaqo we-Kerr lens mode-locking kunye nokubalwa okuphindaphindayo kwe-ABCD matrix, iqela lophando liqale lahlalutya ithiyori ye-mode-locking ye-thin plate Kerr lens mode-locking laser, lalinganisa utshintsho lwe-mode kwi-resonator ngexesha lokusebenza kwe-mode-locking kunye nokusebenza okuqhubekayo, laza laqinisekisa ukuba i-cavity mode radius kwi-hard diaphragm iya kuncitshiswa ngaphezulu kwe-7% emva kwe-mode-locking.

Emva koko, bekhokelwa ngumgaqo woyilo, iqela lophando liyile kwaye lakha i-resonator ye-Kerr lens mode-locked (FIG. 2) esekelwe kwi-72-way pump module (FIG.1) eyaphuhliswa ngokuzimeleyo liqela, kwaye lafumana i-pulsed laser output enamandla aphakathi kwe-11.78W, ububanzi be-pulse ye-245 fs kunye namandla e-pulse enye ye-0.14μJ ngexesha lokupompa le-72 W. Ububanzi be-output pulse kunye notshintsho lwe-intracavity mode ziyavumelana kakuhle neziphumo zokulinganisa.

UMZOBO 2 Umzobo weskemakhi we-resonant cavity ye-Kerr lens mode-locked Yb:YAG wafer laser esetyenzisiweyo kuvavanyo

Ukuze kuphuculwe amandla okukhupha elaser, iqela lophando lonyuse i-curvature radius yesibuko esijolisa amehlo, laza lalungisa ubukhulu obuphakathi beKerr kunye nokusasazwa kwe-second-order. Xa amandla epompo amiselwa kwi-94 W, amandla okukhupha aphakathi anyuswa ukuya kwi-22.33 W, kwaye ububanzi be-pulse babuyi-394 fs kwaye amandla e-single pulse ayeyi-0.28 μJ.

Ukuze kwandiswe amandla okukhupha, iqela lophando liza kwandisa ngakumbi irediyasi egobileyo yesipili esigobileyo esigxile kwi-concave, ngelixa libeka i-resonator kwindawo evaliweyo engaphantsi kwe-vacuum ukunciphisa impembelelo yokuphazamiseka komoya kunye nokusasazeka komoya.