Applied Physics B

, Volume 76, Issue 6, pp 649–653

Distributed feedback laser action by polarization modulation

  • D. Lo
  • C. Ye
  • J. Wang

DOI: 10.1007/s00340-003-1170-2

Cite this article as:
Lo, D., Ye, C. & Wang, J. Appl Phys B (2003) 76: 649. doi:10.1007/s00340-003-1170-2

Abstract.

Laser action was generated in dye-doped sol–gel glass waveguides and in liquid solutions by crossing two beams from a frequency-doubled neodymium:YAG laser. The angle between the polarization directions of the two beams was varied continuously from 90. The case of 0° corresponded to pure intensity modulation. As the angle increased, the degree of intensity modulation decreased, resulting in the decline and finally the demise of the laser output. At 90°, corresponding to pure polarization modulation, distributed feedback laser action with narrow line-width output was again observed when the pump energy was increased three-fold. The laser output also showed different polarization characteristics when the feedback mechanism was changed from intensity modulation to polarization modulation.

PACS: 42.55.Mv;42.70.JR;42.79.Gn

Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • D. Lo
    • 1
  • C. Ye
    • 1
  • J. Wang
    • 1
  1. 1.Physics Department and The Center of Optical Science and Technology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, P.R. ChinaCN