Experimental demonstration of linewidth reduction of laser diode by compact coherent optical negative feedback system

Konosuke Aoyama, Ryuichi Yoshioka, Nobuhide Yokota, Wataru Kobayashi, Hiroshi Yasaka

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We demonstrate the linewidth reduction of a laser diode from 6.4MHz to 6.5 kHz using a compact coherent optical negative feedback system, which consists of only a lens and an optical filter. The FM noise power spectral density (PSD) and the relative intensity noise (RIN) of the laser output are measured to discuss the performance of the system. The FM noise PSD is reduced by ∼30 dB at <100 MHz. The RIN of ∼130 dB/Hz is not found to be increased by the feedback at <7 GHz, where the system is driven under negative feedback conditions.

Original languageEnglish
Number of pages1
JournalApplied Physics Express
Volume7
Issue number12
DOIs
Publication statusPublished - 2014 Dec 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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