Coherent optical tapping using semiconductor optical amplifier

Author

Emura, Katsumi ; Shibutani, Makoto ; Cha, Iljunn ; Kitamura, Mitsuhiro ; Yamazaki, Shuntaro

Author_Institution

NEC Corp., Kawasaki, Japan

Volume

2

Issue

8

fYear

1990

Firstpage

565

Lastpage

567

Abstract

Semiconductor optical amplifiers are attractive not only as optical repeaters but also as functional devices, since carrier density modulation in amplifiers causes a nonlinear phenomenon. Utilizing the effect of the carrier density modulation on the semiconductor optical amplifier junction voltage, a coherent optical tapping is proposed for signal monitoring or control signal extraction. A 155 Mb/s FSK (frequency shift keying) signal tapping was realized with a simple configuration using heterodyne single-filter detection with -24.4 dBm sensitivity. Many applications for this coherent optical tapping are discussed, and basic characteristics for frequency-selective tapping from FDM (frequency division multiplexing) signals and optical amplifier gain control are examined.<>

Keywords

carrier density; demodulation; frequency shift keying; nonlinear optics; optical modulation; semiconductor junction lasers; 155 Mbit/s; FDM; FSK; amplifier junction voltage; carrier density modulation; coherent optical tapping; control signal extraction; frequency division multiplexing; frequency shift keying; frequency-selective tapping; heterodyne single-filter detection; nonlinear phenomenon; optical amplifier gain control; optical repeaters; semiconductor optical amplifier; signal monitoring; Charge carrier density; Frequency shift keying; Nonlinear optical devices; Nonlinear optics; Optical control; Optical mixing; Optical modulation; Optical sensors; Semiconductor optical amplifiers; Stimulated emission;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.58050

Filename

58050