Amandla aphezulu femtosecondlaserinexabiso elikhulu lesicelo kuphando lwezenzululwazi kunye neenkalo zoshishino ezifana nokuveliswa kwe-terahertz, i-attosecond pulse generation kunye ne-optical frequency comb.Iilaser ezitshixiwe ngeModngokusekwe kwimithombo yeendaba yemveli yebhlokhi inqanyulwe yimpembelelo ye-lensing ye-thermal kumandla aphezulu, kwaye okwangoku amandla aphezulu aphuma malunga ne-20 W.
I-laser yephepha elincinci isebenzisa ulwakhiwo lwempompo yokupasa okuninzi ukubonisaipompo ukukhanyakwiphepha lifumana eliphakathi kunye nobukhulu be-100 microns ukufunxa impompo esebenzayo.Ukufumana okuphakathi okuncinci kakhulu kudityaniswe netekhnoloji ye-backcooling kunciphisa kakhulu impembelelo ye-lens ye-thermal kunye ne-nonlinear effect, kwaye inokufikelela kwimveliso yamandla aphezulu e-femtosecond pulse.
I-wafer oscillators edityaniswe ne-Kerr lens mode-locking itekhnoloji zezona ndlela ziphambili zokufumana i-laser yamandla aphakathi aphezulu kunye nobubanzi be-pulse ngokomyalelo we-femtosecond.
IKHIWANE.I-1 (a) I-72 ye-optical structure diagram kunye (b) nedayagram ebonakalayo yemodyuli yempompo
Iqela labaphandi abasuka kwiAkhademi yaseTshayina yezeSayensi bayile kwaye bakha imodyuli ye-Kerr lens etshixekileyo yelaser esekwe kuphuhliswa kwemodyuli yempompo eneendlela ezingama-72, kwaye yaphuhlisa imodyuli yeLens yeKerr etshixwayo ngephepha elinamandla aphakathi kunye nelinye. amandla e-pulse eTshayina.
Ngokusekwe kumgaqo we-Kerr lens mode-locking kunye nokubalwa okuphindaphindiweyo kwe-ABCD matrix, iqela lophando liqale lahlalutya ithiyori yokutshixa icwecwe elicekethekileyo le-Kerr lens yokutshixa i-laser, yalinganisa utshintsho lwemowudi kwi-resonator ngexesha lomsebenzi wokutshixa. kunye nokusebenza okuqhubekayo, kwaye kuqinisekiswe ukuba i-radius yemowudi ye-cavity kwi-diaphragm enzima iya kuncitshiswa ngaphezu kwe-7% emva kokuvala imo.
Emva koko, ngokukhokelwa ngumgaqo woyilo, iqela lophando lenze kwaye lakha i-resonator ye-lens ye-Kerr (FIG. 2) esekelwe kwi-modyuli ye-72-way pump (FIG.1) ephuhliswe ngokuzimeleyo liqela, kwaye ifumene i-laser pulsed laser. imveliso enegunya eliphakathi kwe-11.78W, ububanzi be-pulse ye-245 fs kunye ne-pulse yamandla enye ye-0.14μJ kwi-72 W ixesha lokupompa.Ububanzi be-pulse ephumayo kunye nokuhluka kwemodi ye-intracavity ihambelana kakuhle neziphumo zokulinganisa.
IKHIWANE.2 Umzobo ocwangcisiweyo womgodi ophumayo we-lens ye-Kerr lens itshixiwe Yb: YAG wafer laser esetyenziswa kuvavanyo.
Ukuze kuphuculwe amandla emveliso yelaser, iqela lophando lonyuse iradiyasi egobileyo yesipili esijolisa, kwaye yalungisa kakuhle ubukhulu beKerr obuphakathi kunye nokusasazwa okwesibini.Xa umbane wempompo umiselwe kwi-94 W, amandla okuphuma okuphakathi anyuswe ukuya kwi-22.33 W, kunye nobubanzi be-pulse yi-394 fs kunye ne-pulse eyodwa yamandla yi-0.28 μJ.
Ukwandisa ngakumbi amandla okuphuma, iqela lophando liya kwandisa ngakumbi i-radius ye-curvature ye-concave mirror pair, ngelixa ibeka i-resonator kwindawo ephantsi ye-vacuum evaliweyo ukunciphisa impembelelo yokuphazamiseka komoya kunye nokusabalalisa umoya.
Ixesha lokuposa: Aug-15-2023