[1] Y Zheng, C Q Gao, R Wang, et al. Single frequency 1645 nm Er: YAG nonplanar ring oscillator resonantly pumped by a 1470 nm laser diode. Optics letters, 38, 784-786(2013).

[2] A R Zhou, Y L Han, D S Sun, et al. Analysis and test of wind measurement performance of high optical efficiency coherent Doppler lidar. Infrared and Laser Engineering, 48, 1105006(2019).

[3] T Sakimura, K Hirosawa, Y Watanabe, et al. 1.55-µm high-peak, high- average-power laser amplifier using an Er, Yb: glass planar waveguide for wind sensing coherent Doppler lidar. Optics Express, 27, 24175(2019).

[4] K Mizutani, S Ishii, M Aoki, et al. 2 µm Doppler wind lidar with a Tm: fiber-laser-pumped Ho: YLF laser. Optics Letter, 43, 202-205(2018).

[5] T W Wei, H Y Xia. Simultaneous detection of wind and rain basing on coherent Doppler lidar. Infrared and Laser Engineering, 49, 20200406(2020).

[6] K X Wang, C Q Gao, Z F Lin, et al. 1645 nm coherent Doppler wind lidar with a single-frequency Er: YAG laser. Optics Express, 28, 14694-14704(2020).

[7] [7] Gatt P, Barr K, Margulis M. WindTracer evolution recent measurement results[C]Applications of Lasers f Sensing Free Space Communications, 2015.

[8] Y L Ju, Z G Zhang. Large energy 1.6 μm coherent laser wind measurement radar light source. Modern Radar, 42, 33-36(2020).

[9] P H Tang, J Liu, B Huang, et al. Stable and wavelength-locked Q- switched narrow-linewidth Er: YAG laser at 1645 nm. Optics Express, 23, 11037-11042(2015).

[10] S Li, Q Wang, R Song, et al. Laser diode pumped high-energy single- frequency Er: YAG laser with hundreds of nanoseconds pulse duration. Chinese Optics Letters, 18, 031401(2020).

[11] S Huang, Q Wang, M Zhang, et al. A 3-kHz Er: YAG single-frequency laser with a ‘triple-reflection’ configuration on a piezoelectric actuator. Chinese Physics B, 29, 084204(2020).

[12] C Y Chen, Q Wang, S Huang, et al. Single-frequency Q-switched Er: YAG laser with high frequency and energy stability via the Pound- Drever-Hall locking method. Optics Letters, 45, 3745-3748(2020).

[13] B Q Yao, X Yu, X Y Liu, et al. Room temperature single longitudinal mode laser output at 1645 nm from a laser-diode pumped Er: YAG nonplanar ring oscillator. Optics Express, 21, 8916-8921(2013).

[14] D Y Shen, J K Sahu, W A Clarkson. Highly efficient Er, Yb-doped fiber laser with 188 W free-running and >100 W tunable output power. Optics Express, 13, 4916-4921(2005).

[15] J W Kim, P Jelger, J K Sahu, et al. High-power and wavelength-tunable operation of an Er, Yb fiber laser using a volume Bragg grating. Optics Letters, 33, 1204-1206(2008).

[16] L Wang, N Guo, S J Wang, et al. Resonantly pumped Er: YAG ceramic single-frequency laser//Conference on Lasers and Electro Optics/Pacific Rim. Optical Society of America, s1928(2017).

[17] M Zhang, C Q Gao, M W Gao, et al. 16 W single-frequency laser output from an Er: YAG ceramic nonplanar ring oscillator. Laser Physics Letters, 15, 125803(2018).

[18] D Garbuzov, I Kudryashov, M Dubinskii. 110 W (0.9 J) pulsed power from resonantly diode-laser-pumped 1.6-μm Er: YAG laser. Applied Physics Letters, 87, 121101-121103(2005).

[19] [19] Dubinskii M, Gabrielyan N T, Newburgh G A. Resonantly diodepumped Er: YAG cryolaser at 1618 nm[C]Advanced SolidState Photonics, 2007.

[20] [20] Kudryashov I, Garbuzov D, Dubinskii M. Volume bragg grating improves acteristics of resonantly diode pumped Er: YAG 1.65 mm DPSSL[C]Solid State Lasers, 2007: 183189.

[21] J W Kim, D Y Shen, J K Sahu, et al. Fiber-laser-pumped Er: YAG lasers. IEEE Journal of Selected Topics in Quantum Electronics, 15, 361-371(2009).