8 kHz linewidth, 50 mW output, full C-band wavelength tunable DFB LD array with self-optical feedback

Keisuke Kasai, Masataka Nakazawa, Mitsuteru Ishikawa, Hiroyuki Ishii

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We describe a 1.5 μm, narrow linewidth, high output power wavelength tunable LD that employs a self-optical feedback circuit. By incorporating an optical circulator-based feedback circuit in a DFB LD array, we have successfully reduced the oscillation linewidth from several MHz to less than 8 kHz over the full C-band range. A high output power of approximately 50 mW and a low relative intensity noise of less than −130 dB/Hz were simultaneously achieved. Furthermore, by employing a partial reflection mirror as a self-optical feedback circuit, we have also realized a full C-band wavelength tunable LD with a linewidth of less than 11 kHz and a simple laser configuration.

Original languageEnglish
Pages (from-to)5675-5685
Number of pages11
JournalOptics Express
Volume26
Issue number5
DOIs
Publication statusPublished - 2018 Mar 5

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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