Paper
31 October 1985 Optical Heterodyne Transmission Systems Using DFB/DBR Laser Diodes
K. Minemura, M. Shikada, I. Mito, K. Kobayashi
Author Affiliations +
Abstract
Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK) and Phase shift Keying (PSK) optical heterodyne detection transmission systems have been developed using 1.3 μm and 1.55 μm wavelength DFB/DBR laser diodes. Receiver sensitivity improvement as much as 7-10 dB over direct detection was realized experimentally at 100-200 Mb/s using 50-105 km single mode fibers. The spectral linewidth characteristics of the laser diodes have been studied. Intermediate frequency beat with a few 10 MHz spectral linewdith has been realized by using DFB-DC-PBH LDs. When external cavity loaded DBR-DC-PBH LDs were used, the beat spectral linewidth has been reduced to less than 1 MHz. The intermediate beat frequency fluctuation was stabilized within a few MHz by controlling the local oscillator laser diode injection current.
© (1985) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
K. Minemura, M. Shikada, I. Mito, and K. Kobayashi "Optical Heterodyne Transmission Systems Using DFB/DBR Laser Diodes", Proc. SPIE 0568, Coherent Technology in Fiber Optic Systems I, (31 October 1985); https://doi.org/10.1117/12.949849
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Heterodyning

Receivers

Frequency shift keying

Phase shift keying

Amplitude shift keying

Modulation

Oscillators

RELATED CONTENT


Back to Top