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Proceedings Paper

RF-wave generation using external cavity laser diodes frequency-stabilized to single optical cavity by using orthogonal polarized modes
Author(s): Tomoyuki Uehara; Kohei Hagiwara; Hidetoshi Tanigaki; Kenichiro Tsuji; Noriaki Onodera
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Paper Abstract

We propose a novel stabilization technique for two 1550-nm band external cavity laser diodes (ECLDs) used in optical generation of microwave and millimeter wave signals. Using FM sideband technique, those two ECLDs are simultaneously locked to two resonant modes of a single Fabry-Perot cavity. In the scheme, a new Υ-type optical configuration is used for simultaneous phase modulation of orthogonally polarized two wavelengths transmitted through slow and fast axis of polarization maintaining fiber. The Υ-type optical configuration, which consists of a phase modulator and a Faraday rotator mirror combined with an optical circulator, is a simple and compact apparatus to achieve double-pass phase modulation with the same modulation index . In this paper, we show the results of frequency stabilization of two ECLDs using Υ-type configuration, and compare with the results obtained in conventional non-Υ-type configuration. Short-term stability of 200 kHz at an averaging of 10 ms is achieved in the simple Υ-type configuration.

Paper Details

Date Published: 7 March 2014
PDF: 7 pages
Proc. SPIE 8985, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII, 898513 (7 March 2014); doi: 10.1117/12.2035474
Show Author Affiliations
Tomoyuki Uehara, National Defense Academy of Japan (Japan)
Kohei Hagiwara, National Defense Academy of Japan (Japan)
Hidetoshi Tanigaki, National Defense Academy of Japan (Japan)
Kenichiro Tsuji, National Defense Academy of Japan (Japan)
Noriaki Onodera, National Defense Academy of Japan (Japan)

Published in SPIE Proceedings Vol. 8985:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII
Laurence P. Sadwick; Créidhe M. O'Sullivan, Editor(s)

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