Pulse input response of uncooled laser diodes

Mohd Syuhaimi Ab Rahman, Mazen Radhe Hassan, Khaled Mohamed Shaktur

Research output: Contribution to journalArticle

Abstract

In this paper, the temperature dependences of carrier density, photon density and output optical power of digitally modulated laser diode (LD) is analyzed theoretically. The temperature dependence of laser characteristics is determined according to the temperature dependence of laser cavity parameters and not to the exponential relationship which is in terms of characteristic current I o and temperature T o, i.e., I th = I oe -T/To, where I th is the threshold current. Simulation results show that when temperature of operation increases, (i) threshold carrier density increases due to increasing of carrier density at transparency and internal cavity loss and decreasing of gain coefficient, (ii) photon density and in turn the output power decreases due to increasing of threshold carrier density and Auger recombination coefficient which contributes at high temperature degrees. This would also lead to decrease the relaxation frequency and increase the turn-on time delay. The performance of LD can be improved by increasing of dc-bias current. The benefit of this study is that the designer can predict the performance of uncooled LD when considering it in optical communication system.

Original languageEnglish
Pages (from-to)606-610
Number of pages5
JournalAdvanced Science Letters
Volume13
DOIs
Publication statusPublished - Jun 2012

Fingerprint

Semiconductor Lasers
Laser Diode
Semiconductor lasers
laser
Temperature
Carrier concentration
Temperature Dependence
Photons
communication system
temperature
transparency
performance
Photon
cavity
Cavity
Lasers
Laser
Optical Devices
Decrease
simulation

Keywords

  • Digital Modulation
  • Pulse Input Response
  • Uncooled Laser Diodes

ASJC Scopus subject areas

  • Education
  • Health(social science)
  • Mathematics(all)
  • Energy(all)
  • Computer Science(all)
  • Environmental Science(all)
  • Engineering(all)

Cite this

Pulse input response of uncooled laser diodes. / Ab Rahman, Mohd Syuhaimi; Hassan, Mazen Radhe; Shaktur, Khaled Mohamed.

In: Advanced Science Letters, Vol. 13, 06.2012, p. 606-610.

Research output: Contribution to journalArticle

Ab Rahman, Mohd Syuhaimi ; Hassan, Mazen Radhe ; Shaktur, Khaled Mohamed. / Pulse input response of uncooled laser diodes. In: Advanced Science Letters. 2012 ; Vol. 13. pp. 606-610.
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