[1] Wirth C, Schmidt O, Tsybin I, et al. High average power spectral beam combining of four fiber amplifiers to 8.2 kW[J]. Optics Letters, 2011, 36(16): 3118-3120.

[2] DrachenbergD, DivlianskyI, SmirnovV, et al. High-power spectral beam combining of fiber lasers with ultra high-spectral density by thermal tuning of volume Bragg gratings[C]. SPIE, 2011, 7914: 79141F.

[3] Loftus T H, Thomas A M, Hoffman P R, et al. Spectrally beam-combined fiber lasers for high-average-power applications[J]. IEEE Journal of Selected Topics in Quantum Electronics, 2007, 13(3): 487-497.

[4] Augst S J, Goyal A K, Aggarwal R L, et al. Wavelength beam combining of ytterbium fiber lasers[J]. Optics Letters, 2003, 28(5): 331-333.

[5] Wang J P, Jin Y X, Shao J D, et al. Optimization design of an ultrabroadband, high-efficiency, all-dielectric grating[J]. Optics Letters, 2010, 35(2): 187-189.

[6] Zhu Z D, Gou L, Jiang M H, et al. High beam quality in two directions and high efficiency output of a diode laser array by spectral-beam-combining[J]. Optics Express, 2014, 22(15): 17804-17809.

[7] Zhang J, Peng H Y, Fu X H, et al. CW 50 W/M2=10.9 diode laser source by spectral beam combining based on a transmission grating [J]. Optics Express, 2013, 21(3): 3627-3632.

[8] Yang L, Wu Z, Zhang B. Influence of thermal deformation of a multilayer dielectric grating on a spectrally combined beam[J]. Applied Optics, 2016, 55(32): 9091-9100.

[9] Liu AP, MeadR, VatterT, et al. Spectral beam combining of high-power fiber lasers[C]. SPIE, 2004, 5335: 81- 88.

[10] Loftus T H, Liu A P, Hoffman P R, et al. 522 W average power, spectrally beam-combined fiber laser with near-diffraction-limited beam quality[J]. Optics Letters, 2007, 32(4): 349-351.

[11] Li L X, Liu Q, Chen J M, et al. Polarization-independent broadband dielectric bilayer gratings for spectral beam combining system[J]. Optics Communications, 2017, 385: 97-103.