Random lasers with coherent feedback

Hui Cao*, Junying Y. Xu, Yong Ling, Alexander L. Burin, Eric W. Seeling, Xiang Liu, Robert P.H. Chang

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

66 Scopus citations


We review our recent work on lasing in active random media. Light scattering, which had been regarded as detrimental to lasing action for a long time, actually provided coherent feedback for lasing. The fundamental difference and transition between a random laser with coherent feedback and a random laser with incoherent feedback were illustrated. We also trapped laser light in micrometer-sized random media. The trapping was caused by disorder-induced scattering and interference. This nontraditional way of light confinement has important applications to microlasers.

Original languageEnglish (US)
Pages (from-to)111-119
Number of pages9
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number1
StatePublished - Jan 2003


  • Disordered system
  • Optical scattering
  • Random laser

ASJC Scopus subject areas

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


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