Theory of digital modulation of semiconductor laser diode remotely

Mohd Syuhaimi Ab Rahman, Mazen Radhe Hassan

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The authors present a new theory that can be applied to modulate the semiconductor laser diode (LD) remotely. The proposed scheme utilizes the effect of incoherent external optical feedback (EOF) on the LD output optical signal. In particular, owing to the high increase in threshold carrier density, the LD will be impelled to turn off when the value of external reflectivity is equal to the laser back reflectivity. Thus, by exposing the LD, which is injected with a dc-current higher than threshold, to incoherent EOF digital signal (which conveys the transmitted information), the output optical signal of LD can be modulated accordingly.

Original languageEnglish
Pages (from-to)599-603
Number of pages5
JournalJournal of Modern Optics
Volume58
Issue number7
DOIs
Publication statusPublished - 10 Apr 2011

Fingerprint

semiconductor lasers
modulation
optical communication
reflectance
thresholds
output
high current
lasers

Keywords

  • External optical feedback
  • Laser diode
  • Laser theory
  • Modulation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Theory of digital modulation of semiconductor laser diode remotely. / Ab Rahman, Mohd Syuhaimi; Hassan, Mazen Radhe.

In: Journal of Modern Optics, Vol. 58, No. 7, 10.04.2011, p. 599-603.

Research output: Contribution to journalArticle

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AB - The authors present a new theory that can be applied to modulate the semiconductor laser diode (LD) remotely. The proposed scheme utilizes the effect of incoherent external optical feedback (EOF) on the LD output optical signal. In particular, owing to the high increase in threshold carrier density, the LD will be impelled to turn off when the value of external reflectivity is equal to the laser back reflectivity. Thus, by exposing the LD, which is injected with a dc-current higher than threshold, to incoherent EOF digital signal (which conveys the transmitted information), the output optical signal of LD can be modulated accordingly.

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