Optical control of microspherical laser oscillation by transient absorption

Keiji Sasaki, Kenji Kamada, Hiroshi Masuhara

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9 Scopus citations


A new method for optical control of a lasing process within a microspherical particle has been proposed. A microparticle was doped with a dye for lasing, and with a transient absorber that quenched lasing emission only when excited by light. The quality factor of a microspherical cavity was reduced by the transient absorption loss which could be arbitrarily varied with the excitation intensity, so that the lasing emission intensity was controllable with excitation light. On-off switching of microspherical laser oscillation and picosecond pulse shortening with optical Q-switching are demonstrated as preliminary experiments.

Original languageEnglish
Pages (from-to)1413-1416
Number of pages4
JournalJapanese Journal of Applied Physics
Issue number10A
StatePublished - 1 Jan 1994


  • Laser
  • Microsphere
  • Optical control
  • Pulse shortening
  • Q-switching
  • Transient absorption

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