[2] WANG H, PAN J, MENG Y A, et al. Advances of Yb∶CALGO laser crystals［J］. Crystals, 2021, 11(9): 1131.

[3] MAIMAN T H. Stimulated optical radiation in ruby［J］. Nature, 1960, 187(4736): 493-494.

[4] PATEL C K N, TIEN P K, MCFEE J H. CW high-power CO2-N2-He laser［J］. Applied Physics Letters, 1965, 7(11): 290-292.

[5] BROMBERG J L, FRANKEN P. The laser in America, 1950-1970［J］. Physics Today, 1992, 45(3): 67-68.

[6] SOROKIN P P, LANKARD J R. Stimulated emission observed from an organic dye, chloro-aluminum phthalocyanine［J］. IBM Journal of Research and Development, 1966, 10(2): 162-163.

[7] SCHFER F P, SCHMIDT W, VOLZE J. Organic dye solution laser［J］. Applied Physics Letters, 1966, 9(8): 306-309.

[8] SOFFER B H, MCFARLAND B B. Continuously tunable, narrow-band organic dye lasers［J］. Applied Physics Letters, 1967, 10(10): 266-267.

[9] BOULON G. Fifty years of advances in solid-state laser materials［J］. Optical Materials, 2012, 34(3): 499-512.

[10] HATCH S E, PARSONS W F, WEAGLEY R J. Hot-pressed polycrystalline CaF2∶Dy2+ laser［J］. Applied Physics Letters, 1964, 5(8): 153-154.

[11] HECHT J. Short history of laser development［J］. Optical Engineering, 2010, 49(9): 091002.

[12] PRONIN O, BRONS J, GRASSE C, et al. High-power 200 fs Kerr-lens mode-locked Yb∶YAG thin-disk oscillator［J］. Optics Letters, 2011, 36(24): 4746-4748.

[13] MACHINET G, SEVILLANO P, GUICHARD F, et al. High-brightness fiber laser-pumped 68 fs-23 W Kerr-lens mode-locked Yb: CaF2 oscillator［J］. Optics Letters, 2013, 38(20): 4008.

[14] SVILLANO P, GEORGES P, DRUON F, et al. 32-fs Kerr-lens mode-locked Yb∶CaGdAlO4 oscillator optically pumped by a bright fiber laser［J］. Optics Letters, 2014, 39(20): 6001-6004.

[15] TIAN W L, YU C, ZHU J F, et al. Diode-pumped high power sub-100 fs Kerr-lens mode-locked Yb∶CaYAlO4 laser with 1.85 MW peak power［J］. Optics Express,2019,15(27): 21448-21454

[16] WANG Y R, SU X C, XIE Y Y, et al. 17.8 fs broadband kerr-lens mode-locked Yb∶CALGO oscillator［J］. Optics Letters, 2021, 46(8): 1892-1895.

[17] LOIKO P, BECKER P, BOHATY L, et al. Sellmeier equations, group velocity dispersion, and thermo-optic dispersion formulas for CaLnAlO4 (Ln=Y, Gd) laser host crystals［J］. Optics Letters, 2017, 42(12): 2275-2278.

[18] DRUON F, OLIVIER M, BALEMBOIS F, et al. Yb∶CaGdAlO4 laser under high pumping power: high performances and singularities［C］//SPIE LASE. Proc SPIE 8959, Solid State Lasers XXIII: Technology and Devices, San Francisco, California, USA. 2014, 8959: 263-268.

[19] BOUDEILE J, DRUON F, HANNA M, et al. Continuous-wave and femtosecond laser operation of Yb∶CaGdAlO4 under high-power diode pumping［J］. Optics Letters, 2007, 32(14): 1962-1964.

[20] TALIK E, KISIELEWSKI J, ZAJDEL P, et al. XPS spectroscopy, structural, magnetic and dielectric investigations of CaGdAlO4 and Yb∶CaGdAlO4 single crystals［J］. Optical Materials, 2019, 91: 355-362.

[21] GAO Z Y, ZHU J F, WANG J L, et al. Generation of 33 fs pulses directly from a Kerr-lens mode-locked Yb∶CaYAlO4 laser［J］. Photonics Research, 2015, 3(6): 335.

[22] PETIT J, GOLDNER P, VIANA B. Laser emission with low quantum defect in Yb∶CaGdAlO4［J］. Optics Letters, 2005, 30(11): 1345-1347.

[25] DI J Q, XU X D, XIA C T, et al. Crystal growth, polarized spectra, and laser performance of Yb∶CaGdAlO4 crystal［J］. Laser Physics, 2016, 26(4): 045803.

[26] JAFFRe S A, RICAUD S, SUGANUMA A, et al. Yb∶CALGO as material for high power ultrafast laser and focus on thermal conductivity variation［C］//SPIE OPTO. Proc SPIE 8621, Optical Components and Materials X, San Francisco, California, USA. 2013, 8621: 395-401.

[27] JAFFRèS A, RICAUD S, SUGANUMA A, et al. Thermal conductivity versus Yb3 concentration in Yb∶CALGO: a material for high power ultrafast laser［C］//2013 Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference CLEO EUROPE/IQEC. May 12-16, 2013, Munich, Germany. IEEE, 2014: 1.

[28] ZHANG N, WANG H Y, YIN Y Q, et al. Cracking mechanism and spectral properties of Er, Yb∶CaGdAlO4 crystals grown by the LHPG method［J］. CrystEngComm, 2020, 22(5): 955-960.

[29] WIERZBICKA E, MALINOWSKA A, WIERZCHOWSKI W, et al. Investigation of structural defects in ytterbium doped calcium gadolinum aluminate crystals by means of the synchrotron and conventional diffraction topography［J］. Thin Solid Films, 2017, 643: 16-23.

[30] HU Q Q, JIA Z T, TANG C, et al. The origin of coloration of CaGdAlO4 crystals and its effect on their physical properties［J］. CrystEngComm, 2017, 19(3): 537-545.

[31] BEIL K, DEPPE B, KRNKEL C. Yb∶CaGdAlO4 thin-disk laser with 70% slope efficiency and 90 nm wavelength tuning range［J］. Optics Letters, 2013, 38(11): 1966-1968.

[32] KRUCZEK M, TALIK E, PAWLAK D, et al. X-ray photoelectron spectroscopy studies of PrAlO3 crystals before and after thermal treatment［J］. Optics express, 22(10), 11884-11891.

[33] PETIT J, GOLDNER P, VIANA B, et al. Quest of athermal solid state laser: case of Yb∶CaGdAlO4［C］//SPIE Proceedings, Solid State Lasers and Amplifiers Ⅱ. Strasbourg, France. SPIE, 2006: 619003.

[34] AKBARI R, LOIKO P, MAJOR A. Thermal lensing in diode-pumped Yb∶CALGO and Yb∶KGW lasers［C］//Solid State Lasers XXIX: Technology and Devices. February 1-6, 2020. San Francisco, USA. SPIE, 2020, 11259: 112591 W.

[35] GRIEBNER U, PETROV V, PETERMANN K, et al. Passively mode-locked Yb∶Lu2O3 laser ［C］//Conference on Lasers and Electro-Optics/International Quantum Electronics Conference and Photonic Applications Systems Technologies. Optica Publishing Group, 2004: CTuCC2.

[36] KULESHOV N V, LAGATSKY A A, PODLIPENSKY A V, et al. Pulsed laser operation of Yb-doped KY(WO4)2 and KGd(WO4)2［J］. Optics Letters, 1997, 22(17): 1317-1319.

[37] LOIKO P, DRUON F, GEORGES P, et al. Thermo-optic characterization of Yb∶CaGdAlO4 laser crystal［J］. Optical Materials Express, 2014, 4(11): 2241.

[38] SHEN Y J, MENG Y A, FU X, et al. Dual-wavelength vortex beam with high stability in a diode-pumped Yb∶CaGdAlO4 laser［J］. Laser Physics Letters, 2018, 15(5): 055803.

[39] DRUON F, OLIVIER M, JAFFRS A, et al. Magic mode switching in Yb∶CaGdAlO4 laser under high pump power［J］. Optics Letters, 2013, 38(20): 4138-4141.

[40] STRICKLAND D, MOUROU G. Compression of amplified chirped optical pulses［J］. Optics Communications, 1985, 56(3): 219-221.

[41] KELLER U, MILLER D A, BOYD G D, et al. Solid-state low-loss intracavity saturable absorber for Nd∶YLF lasers: an antiresonant semiconductor Fabry-Perot saturable absorber［J］. Optics Letters, 1992, 17(7): 505-507.

[42] DIDDAMS S, VAHALA K, UDEM T. Optical frequency combs: coherently uniting the electromagnetic spectrum［J］. Science, 2020, 369: eaay3676.

[43] ZHENG J Q, CONG Z H, LIU Z J, et al. Recent trend of high repetition rate ultrashort laser pulse generation and frequency conversion［J］. Chinese Journal of Lasers, 2021, 48(12): 1201008.

[44] JANG Y S, KIM S W. Distance measurements using mode-locked lasers: a review［J］. Nanomanufacturing and Metrology, 2018, 1(3): 131-147.

[45] MAYER A S, PHILLIPS C R, KELLER U. Watt-level 10-gigahertz solid-state laser enabled by self-defocusing nonlinearities in an aperiodically poled crystal［J］. Nature Communications, 2017, 8: 1673.

[46] VIANA B, PETIT J, GOLDNER P, et al. 47 fs in diode-pumped Yb∶CaGdAlO4［C］//SPIE Photonics Europe. Proc SPIE 6190, Solid State Lasers and Amplifiers Ⅱ, Strasbourg, France. 2006, 6190: 619001.

[47] YANG J F, WANG Z H, SONG J J, et al. Diode-pumped 10 W femtosecond Yb∶CALGO laser with high beam quality［J］. High Power Laser Science and Engineering, 2021, 9: e33.

[48] WANG S, WANG Y B, FENG G Y, et al. Harmonically mode-locked Yb∶CALGO laser pumped by a single-mode 12 W laser diode［J］. Optics Express, 2018, 26(2): 1521.

[51] SPENCE D E, KEAN P N, SIBBETT W. 60-fsec pulse generation from a self-mode-locked Ti∶sapphire laser［J］. Optics Letters, 1991, 16(1): 42-44.

[52] MENG X H, BAN X N, LV C, et al. 95 fs pulses with 1.21 MW peak power from diode-pumped ultrafast Yb∶CaGdAlO4 laser using an additional Kerr medium［J］. Optics Communications, 2021, 498: 127246.

[53] KIM D Y, PARK B J, LEE S Y, et al. High-power 50 fs kerr-lens mode-locked Yb∶CALGO oscillator［J］. Optics & Laser Technology, 2023, 159: 109019.

[54] MANJOORAN S, MAJOR A. Diode-pumped 45 fs Yb∶CALGO laser oscillator with 1.7 MW of peak power［J］. Optics Letters, 2018, 43(10): 2324-2327.

[55] RICAUD S, JAFFRES A, LOISEAU P, et al. Yb∶CaGdAlO4 thin-disk laser［J］. Optics Letters, 2011, 36(21): 4134-4136.

[56] RICAUD S, JAFFRES A, WENTSCH K, et al. Femtosecond Yb∶CaGdAlO4 thin-disk oscillator［J］. Optics Letters, 2012, 37(19): 3984-3986.

[57] MODSCHING N, PARADIS C, LABAYE F, et al. Kerr lens mode-locked Yb∶CALGO thin-disk laser［J］. Optics Letters, 2018, 43(4): 879-882.

[59] MURRAY J E, LOWDERMILK W H. Nd∶YAG regenerative amplifier［J］. Journal of Applied Physics, 1980, 51(7): 3548-3556.

[61] CARACCIOLO E, KEMNITZER M, GUANDALINI A, et al. High pulse energy multiwatt Yb∶CaAlGdO4 and Yb∶CaF2 regenerative amplifiers［J］. Optics Express, 2014, 22(17): 19912.

[62] WANG W Z, PU T, WU H, et al. High-power Yb∶CALGO regenerative amplifier and 30 fs output via multi-plate compression［J］. Optics Express, 2022, 30(12): 22153.

[63] WANG G Y, BAI C, ZHENG L, et al. MHz repetition rate femtosecond Yb∶CaGdAlO4 regenerative amplifier generating 20-W 168-fs pulses［J］. IEEE Photonics Technology Letters, 2023, 35(4): 171-174.