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

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

Authors and Affiliations

  1. 1.Department of PhysicsHarbin Institute of TechnologyHarbinChina
  2. 2.Department of Optoelectronics ScienceHarbin Institute of Technology at WeihaiWeihaiChina
  3. 3.School of PhysicsShandong UniversityJinanChina
  4. 4.State Key Laboratory of Crystal MaterialsShandong UniversityJinanChina