Dual-comb technique is very attractive in terms of high speed spectroscopy. Recently, dual comb lasers that generate two combs as the outputs absorbs a lot of interests [1-3]. In the practical applications, the stability and repeatability are important factors. The usage of polarization maintaining devices is effective to realize the stable dual comb lasers.

© 2019 Japan Society of Applied Physics, The Optical Society (OSA)

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