An orthogonally polarized self-mode-locked Nd:YAG laser is demonstrated in a short linear cavity. Under an incident pump power of 8.2 W, the average output power can be measured to be 3.8 W. The beat frequency Δfc between two orthogonally polarized mode-locked components is observed and increases linearly with an increase in the incident pump power. The origin of the beat frequency is utterly confirmed to be caused by the thermal-stress-induced birefringence in the Nd:YAG crystal and is theoretically simulated. The present result provides a promising method to achieve orthogonally polarized mode-locked lasers with tunable beat frequency.
C. Y. Lee, Cheng-Lin Sung, C. Y. Cho, Hao-Ping Cheng, and Y. F. Chen, "Orthogonally polarized self-mode-locked Nd:YAG laser with tunable beat frequencies," Proc. SPIE 10082, Solid State Lasers XXVI: Technology and Devices, 100820Y (Presented at SPIE LASE: January 31, 2017; Published: 17 February 2017); https://doi.org/10.1117/12.2251358.
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