The Onset of Coherence Collapse in DBR Lasers

S. L. Woodward, T. L. Koch, U. Koren

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


In this letter, we investigate how the onset of coherence collapse depends on laser output power. The lasers were three-section multiquantum-well distributed-Bragg-reflector (MQW-DBR) lasers. The fraction of light reflected back into the lasing mode was varied, and the point at which the transition to coherence collapse occurred was measured. This feedback level varies approximately linearly with laser output power. For these lasers, when the output power is 1 mW, the transition to coherence collapse begins when the optical feedback into the lasing mode is below - 40 dBm; when the feedback power is - 35 dBm the laser line is completely collapsed.

Original languageEnglish (US)
Pages (from-to)391-394
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number6
StatePublished - Jun 1990

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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