Lasing characteristics of random cylindrical microcavity lasers

H. Zhu, Siu Fung Yu, W. F. Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


Room-temperature lasing characteristics of random cylindrical microcavity lasers, which can be realized by coating a layer of random gain medium onto the surface of an optical fiber with various diameters, was studied experimentally. It is shown that closed-loop random modes excited inside the random gain medium are strongly confined along the radial direction so that the spacing of lasing modes is controlled by the diameter of cylindrical microcavity. In addition, lasing threshold of the random gain medium can be reduced by an order of magnitude under the influence of radial optical confinement.
Original languageEnglish
Article number241111
JournalApplied Physics Letters
Issue number24
Publication statusPublished - 12 Dec 2011

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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