Applied Physics B

, Volume 103, Issue 1, pp 145–149

Buried channel waveguides in neodymium-doped KGd(WO4)2 fabricated by low-repetition-rate femtosecond laser writing

Authors

  • X. Liu
    • Department of PhysicsHarbin Institute of Technology
    • Department of Optoelectronics ScienceHarbin Institute of Technology at Weihai
    • Department of PhysicsHarbin Institute of Technology
    • Department of Optoelectronics ScienceHarbin Institute of Technology at Weihai
  • Y. Tan
    • School of PhysicsShandong University
  • C. Zhang
    • School of PhysicsShandong University
    • School of PhysicsShandong University
    • State Key Laboratory of Crystal MaterialsShandong University
Article

DOI: 10.1007/s00340-010-4187-3

Cite this article as:
Liu, X., Qu, S., Tan, Y. et al. Appl. Phys. B (2011) 103: 145. doi:10.1007/s00340-010-4187-3

Abstract

Symmetric buried waveguides were fabricated in neodymium-doped KGd(WO4)2 by using femtosecond laser writing in the low-frequency regime. Due to stress-induced index changes in the regions surrounding the focal spot, mode guidance was demonstrated and low propagation losses of ∼0.2 dB/cm were obtained. Based on the comparison of the waveguides fabricated with different parameters, we present further significant analysis to get low-loss waveguides with symmetrical mode profiles. According to the reconstructed index profile, the mode distribution was numerically calculated by the beam propagation method, which showed a reasonable agreement with the experimental results.

Copyright information

© Springer-Verlag 2010