Spectral dynamics of an all solid-state frequency-shifted feedback laser |
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| Authors: | Kumio Kasahara Koichiro Nakamura Manabu Sato Hiromasa Ito |
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| Institution: | (1) Research Institute of Electrical Communication, Tohoku University, 980-77 Sendai, Japan;(2) Present address: Information Technology R&D Center, Mitsubishi Electric Corp., 247 Kamakura, Japan |
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| Abstract: | A frequency-shifted feedback (FSF) laser has multi frequency components with simultaneous linear chirping in its oscillation
spectrum even though the gain medium is homogeneously broadened. The spectral intensity and its bandwidth were analyzed by
the proposed spectral dynamics model based on the regenerative amplification of the continuously chirped comb components with
phase shift according to each round trip in the cavity. The spectral intensity peaks at an instantaneous frequency which depends
on the net gain in the cavity and the gain bandwidth of atomic transition. The oscillation bandwidth is defined as the product
of the saturation-broadened bandwidth and the total resonant modes contributing to the FSF operation. |
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| Keywords: | frequency-shifted feedback acousto-optic modulator all solid-state laser spectral dynamics oscillation bandwidth instantaneous frequency |
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