Frequency-difference stabilization of distributed-feedback laser diodes by use of an optical frequency translation circuit

Kaoru Shimizu, Tsuneo Horiguchi, Yahei Koyamada

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Frequency-difference stabilization over a 100-GHz range is demonstrated for two distributed-feedback laser diodes (LD’s) by utilizing a loss-compensated optical loop with a frequency shifter. A light wave emitted from a master distributed-feedback LD is modulated into a pulse. The pulse is then circulated around the optical loop to shift its frequency to the difference required between the master and slave distributed-feedback LD’s. A continuous-wave pulse from the slave LD is mixed with the frequency-shifted pulse, and their beat frequency is measured with a conventional low-speed heterodyne receiver. The frequency of the slave laser is adjusted by controlling the injection current so that the heterodyne beat frequency is kept constant. The error in the center frequency difference was estimated to be within the submegahertz range for a short period of 10 min.

Original languageEnglish
Pages (from-to)1819-1821
Number of pages3
JournalOptics Letters
Volume18
Issue number21
DOIs
Publication statusPublished - 1993 Nov 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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