Optical Heterodyne Transmission Systems Using DFB/DBR Laser Diodes

K. Minemura; M. Shikada; I. Mito; K. Kobayashi

doi:10.1117/12.949849

31 October 1985 Optical Heterodyne Transmission Systems Using DFB/DBR Laser Diodes

K. Minemura, M. Shikada, I. Mito, K. Kobayashi

Proceedings Volume 0568, Coherent Technology in Fiber Optic Systems I; (1985) https://doi.org/10.1117/12.949849
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

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.

Citation Download Citation

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

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