Dynamic coherence measurements of index- and gain-guided VCSEL's

S. A. Kemme, Raymond K Kostuk, C. K Y Chun

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Coherence properties of several different types of VCSEL's are examined with constant and modulated injection current with a bandwidth typical of that used in telecommunications. Large signal modulation of index-guided single transverse-mode VCSEL's is found to reduce the coherence length by more than a factor of ten relative to the direct current configuration. Multiple transverse-mode index-guided VCSEL's have similar coherence lengths when operated dc and modulated, and shorter than that of the single transverse-mode VCSEL's. Gain-guided multiple transverse-mode VCSEL's also have shorter coherence lengths than single transverse-mode VCSEL's and under modulation can have coherence lengths as low as 0.5 cm.

Original languageEnglish (US)
Pages (from-to)554-556
Number of pages3
JournalIEEE Photonics Technology Letters
Volume9
Issue number5
DOIs
StatePublished - May 1997

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Surface emitting lasers
Laser modes
modulation
Modulation
telecommunication
direct current
Telecommunication
injection
bandwidth
Bandwidth
configurations

Keywords

  • Coherence length
  • Modal noise
  • Multiple transverse mode VCSEL's
  • Optical interconnections
  • Optical spectra
  • Vertical-cavity surface-emitting lasers (VCSEL's)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)

Cite this

Dynamic coherence measurements of index- and gain-guided VCSEL's. / Kemme, S. A.; Kostuk, Raymond K; Chun, C. K Y.

In: IEEE Photonics Technology Letters, Vol. 9, No. 5, 05.1997, p. 554-556.

Research output: Contribution to journalArticle

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