Highly accurate frequency counting system for 1.5 um wavelength semiconductor lasers

Motonobu Kourogi; Kenichi Nakagawa; Motoichi Ohtsu

doi:10.1117/12.143676

30 April 1993 Highly accurate frequency counting system for 1.5-μm wavelength semiconductor lasers

Motonobu Kourogi, Kenichi Nakagawa, Motoichi Ohtsu

Proceedings Volume 1837, Frequency-Stabilized Lasers and Their Applications; (1993) https://doi.org/10.1117/12.143676
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

For highly accurate optical frequency measurement in 1.5 micrometers wavelength region, an optical frequency comb (OFC) generator was realized by using a high frequency LiNbO₃ electro-optic phase modulator which was installed in a Fabry-Perot cavity. By using the OFC generator, we demonstrated the frequency difference measurement up to 0.5 [THz] with a signal-to-noise ratio higher than 61 [dB], and the heterodyne optical phase locking with a heterodyne frequency of 0.5 [THz] in which the residual phase error variance was less than 0.01 [radian²]. The maximum measurable frequency difference, which was defined as a sideband frequency with the signal-to-noise ratio of 0 [dB], was estimated to be 4 [THz].

Citation Download Citation

Motonobu Kourogi, Kenichi Nakagawa, and Motoichi Ohtsu "Highly accurate frequency counting system for 1.5-μm wavelength semiconductor lasers", Proc. SPIE 1837, Frequency-Stabilized Lasers and Their Applications, (30 April 1993); https://doi.org/10.1117/12.143676

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