Title

Subgigahertz Channel Filtering By Optical Heterodyne Detection Using A Single Axial Mode From An Injection-Locked Passively Mode-Locked Semiconductor Laser

Abstract

We report experimental results of fine (subgigahertz) channel filtering via optical heterodyne detection based on an optical injection locking technique. A passively mode-locked semiconductor laser injection locked to a master oscillator forms a comb of discrete frequency probes, and a single axial mode is used as a local oscillator (LO). The injection-locked LO carrier showed 42-dB phase noise suppression at 100-kHz offset. One of two analog radio frequency signals detuned by only 200 MHz showed a signal-to-noise ratio over 65 dB/Hz through demultiplexing with a commercially available microwave bandpass filter. The single sideband noise of the heterodyne beat tone at 13.160 GHz was measured to be - 123 dBc/Hz at 100 kHz offset from the carrier under injection-locked state. © 2004 IEEE.

Publication Date

8-1-2004

Publication Title

IEEE Photonics Technology Letters

Volume

16

Issue

8

Number of Pages

1945-1947

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/LPT.2004.831243

Socpus ID

4043082813 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/4043082813

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