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Sub‐nanosecond, single longitudinal mode laser based on a VBG ‐coupled EOQ Nd: YVO 4 oscillator for remote sensing
Author(s) -
Jiang Yewen,
Li Peilin,
Fu Xing,
Liu Qiang
Publication year - 2021
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32988
Subject(s) - nanosecond , resonator , longitudinal mode , laser , materials science , optics , multi mode optical fiber , pulse (music) , power (physics) , fiber bragg grating , pulse width modulation , optoelectronics , physics , optical fiber , quantum mechanics , detector
High energy, sub‐nanosecond, single longitudinal mode (SLM) pulse is especially preferred for LiDAR application. In this paper, a kHz‐level sub‐nanosecond electro‐optical Q‐switched Nd:YVO 4 laser of SLM operation for remote sensing was demonstrated. By utilizing a compact resonator with a Volume Bragg Grating as output coupler, maximum SLM output power of 1.08 W and pulse width of 919 ps was obtained at 10 kHz. Moreover, we proposed a theoretical model to calculate the multimode threshold of the VBG‐coupled cavity. The longitudinal mode characteristics at four different cavity lengths were investigated experimentally and the results match well with the numerical simulations, which validates the theory. We expected the method could help to guide VBG‐coupled cavity design and construction.