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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1994),
  • paper CThA4

Monolithic optical frequency comb generators at 1,5-p.m wavelength region

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Abstract

Measurement of frequency difference between two independent lasers which are spaced in a span as wide as several THz is required for industrial applications such as optical frequency division multiplexing in optical communication systems and for precision physical measurements such as highly accurate absolute laser frequency measurement using a frequency-multiplication chain. However it has been difficult to measure such a high frequency difference because of the lack of reliable ultrahigh speed optical heterodyne receiver. In order to overcome this difficulty, we have proposed a highly accurate and wide span optical frequency difference measurement method* using an optical frequency comb (OFC) generator which generates a precisely spaced comb of frequencies through large-index phase modulation. We have already demonstrated the OFC generation with a span of 4 THz and heterodyne optical phase locking with a heterodyne frequency of 0.5 THz2 by using an OFC generator which is composed of an electro-optic phase modulator installed within a Fabry- Perot cavity so that the modulation efficiency is increased by multiple passes of light through the modulator.

© 1994 Optical Society of America

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