[1] Y Cai, F Gao, H Chen, et al. Continuous-wave diamond laser with a tunable wavelength in orange–red wavelength band. Optics Communications, 528, 128985(2023).

[2] Hui Chen, Zhenxu Bai, Jiancai Wang, . Hundred-Watt green picosecond laser based on LBO frequency-doubled photonic crystal fiber amplifier. Infrared and Laser Engineering, 50, 20200522(2021).

[3] L Matos, D Kleppner, O Kuzucu, et al. Direct frequency comb generation from an octave-spanning, prismless Ti: sapphire laser. Optics Letters, 29, 1683-1685(2004).

[4] C Wang, M Chen, H Xiang, et al. 8 mJ 355 nm 1 kHz burst-mode picosecond laser systems. Laser Physics, 32, 045801(2022).

[5] X Huo, Y Qi, Y Zhang, et al. Research development of 589 nm laser for sodium laser guide stars. Optics and Lasers in Engineering, 134, 106207(2020).

[6] Wei You, Xuezong Yang, Weibiao Chen, . Review of 589 nm sodium laser guide stars (Invited). Electro-Optic Technology Application, 36, 1-14, 22(2021).

[7] J Hu, D Zhu. Investigation of carbon fiber reinforced plastics machining using 355 nm picosecond pulsed laser. Applied Composite Materials, 25, 589-600(2018).

[8] P Franken, A E Hill, C E Peters, et al. Generation of optical harmonics. Physical Review Letters, 7, 118(1961).

[9] S C Kumar, G Samanta, K Devi, et al. High-efficiency, multicrystal, single-pass, continuous-wave second harmonic generation. Optics Express, 19, 11152-11169(2011).

[10] N Bloembergen, P Pershan. Light waves at the boundary of nonlinear media. Physical Review, 128, 606(1962).

[11] D A Kleinman. Theory of second harmonic generation of light. Physical Review, 128, 1761(1962).

[12] G Boyd, A Ashkin, J Dziedzic, et al. Second-harmonic generation of light with double refraction. Physical Review, 137, A1305(1965).

[13] C Jung, W Shin, B-A Yu, et al. Enhanced 355-nm generation using a simple method to compensate for walk-off loss. Optics Express, 20, 941-948(2012).

[14] J-J Zondy, M Abed, S Khodja. Twin-crystal walk-off-compensated type-II second-harmonic generation: single-pass and cavity-enhanced experiments in KTiOPO₄. JOSA B, 11, 2368-2679(1994).

[15] K Li, H Zhao, H Ma, et al. Theoretical and experimental researches on the walk-off compensation of an intracavity doubling red laser using a twin-BIBO-crystal. Optics Express, 29, 43687-43699(2021).

[16] B Ruffing, A Nebel, R Wallenstein. High-power picosecond LiB₃O₅ optical parametric oscillators tunable in the blue spectral range. Applied Physics B, 72, 137-149(2001).

[17] G Boyd, D Kleinman. Parametric interaction of focused Gaussian light beams. Journal of Applied Physics, 39, 3597-3639(1968).

[18] G K Samanta, S C Kumar, M Ebrahim-Zadeh. Stable, 9.6 W, continuous-wave, single-frequency, fiber-based green source at 532 nm. Optics Letters, 34, 1561-1563(2009).

[19] F Brehat, B Wyncke. Calculation of double-refraction walk-off angle along the phase-matching directions in non-linear biaxial crystals. Journal of Physics B: Atomic, Molecular and Optical Physics, 22, 1891(1989).

[20] A M Weiner, A M Kan’an, D E Leaird. High-efficiency blue generation by frequency doubling of femtosecond pulses in a thick nonlinear crystal. Optics Letters, 23, 1441-1443(1998).

[21] A V Smith, D J Armstrong, W J Alford. Increased acceptance bandwidths in optical frequency conversion by use of multiple walk-off-compensating nonlinear crystals. JOSA B, 15, 122-141(1998).

[22] H Wang, A M Weiner. Efficiency of short-pulse type-I second-harmonic generation with simultaneous spatial walk-off, temporal walk-off, and pump depletion. IEEE Journal of Quantum Electronics, 39, 1600-1618(2003).

[23] N A Chaitanya, A Aadhi, R P Singh, et al. Type-I frequency-doubling characteristics of high-power, ultrafast fiber laser in thick BIBO crystal. Optics Letters, 39, 5419-5422(2014).

[24] N A Chaitanya, A Aadhi, S C Kumar, et al. Frequency-doubling of femtosecond pulses in "thick" nonlinear crystals with different temporal and spatial walk-off parameters. IEEE Photonics Journal, 8, 1-13(2016).

[25] D S Hum, M M Fejer. Quasi-phasematching. Comptes Rendus Physique, 8, 180-198(2007).

[26] R Eckardt, J Reintjes. Phase matching limitations of high efficiency second harmonic generation. IEEE Journal of Quantum Electronics, 20, 1178-1187(1984).