Analysis of laser diodes as transmitter and preamplifiers in time compression multiplexing systems

Norio Kashima

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

It is proposed that a laser diode used as a transmitter in the transmission mode be used as a low bias current preamplifier in the receiving mode for time compression multiplexing (TCM) transmission. By adopting the low bias current approach, the preamplifier is wavelength and polarization independent. The maximum bias current is determined to be about 0.5 Ith (Ith = threshold current) by experiments. A transmission experiment at 3.5 Mb/s reveals that about 4 dB of improvement in receiver sensitivity can be obtained by using a laser preamplifier at I = 0.54 Ith when compared to an unbiased laser. The receiver sensitivity of the proposed configuration (laser amplifier at low bias current and photodiode) is estimated by considering the laser preamplifier noise and circuit noise. The laser preamplifier noise is calculated by treating the laser as a traveling wave amplifier with high reflecting facets.

Original languageEnglish
Pages (from-to)323-329
Number of pages7
JournalJournal of Lightwave Technology
Volume10
Issue number3
DOIs
Publication statusPublished - 1992 Mar
Externally publishedYes

Fingerprint

preamplifiers
multiplexing
Multiplexing
transmitters
Semiconductor lasers
Transmitters
Bias currents
semiconductor lasers
Lasers
lasers
receivers
traveling wave amplifiers
Light amplifiers
Photodiodes
threshold currents
photodiodes
flat surfaces
amplifiers
Experiments
Polarization

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

Analysis of laser diodes as transmitter and preamplifiers in time compression multiplexing systems. / Kashima, Norio.

In: Journal of Lightwave Technology, Vol. 10, No. 3, 03.1992, p. 323-329.

Research output: Contribution to journalArticle

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