Mode density multiplication of an optical frequency comb by N2 with phase modulation | Zendy

Taro Hasegawa | Zendy

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Mode density multiplication of an optical frequency comb by N² with phase modulation

Author(s) -

Taro Hasegawa

Publication year - 2018

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.26.024551

Subject(s) - optics , phase modulation , modulation (music) , phase (matter) , multiplication (music) , frequency comb , mode locking , materials science , physics , laser , phase noise , quantum mechanics , acoustics

We introduce a simple scheme for mode-density multiplication of an optical frequency comb (OFC) by a factor of square of an arbitrary integer N using phase modulation. This scheme is employed to multiply the mode density of an erbium-doped fiber laser OFC (repetition rate of 66.87 MHz) by factors of 4 2 , 8 2 , and 3 · 4 2 using an electro-optic phase modulator. The OFC multiplied by 4 2 is applied to direct-comb spectroscopy of methane with a spectral resolution of 4.18 MHz.

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