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 ezininzi ukubonisaimpompo 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 ezidityaniswe ne-Kerr lens mode-locking itekhnoloji zezona ndlela zokufumana umndilili ophezulu wokuphuma kwelaser kunye nobubanzi bepulse ngokomyalelo we-femtosecond.
IKHIWANE. I-1 (a) I-72 ye-optical structure diagram kunye (b) nedayagram ebonakalayo yemodyuli yempompo
Iqela labaphandi abavela kwiAkhademi yaseTshayina yezeSayensi bayile kwaye bakha imodyuli ye-Kerr lens etshixekileyo yelaser esekwe kwimodyuli 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