A new (to our knowledge) ultrashort laser pulse irradiation regime that allows us to directly modify and increase the refractive index of rare earth doped YAG polycrystalline ceramics has been identified. Single-mode buried channel waveguides in both Ho:YAG and Er:YAG ceramics at the near-IR wavelengths of and are demonstrated by fabricating positive square step-index cores. Minimum propagation losses of at a wavelength have been preliminarily obtained. Confocal microluminescence mapping reveals that the increased refractive index regions retain the near-IR spectral properties of ions in the YAG crystalline matrix.
© 2011 Optical Society of AmericaFull Article | PDF Article
Feng Chen, Yang Tan, and Daniel Jaque
Opt. Lett. 34(1) 28-30 (2009)
Yang Tan, Airan Rodenas, Feng Chen, Robert R. Thomson, Ajoy K. Kar, Daniel Jaque, and Qingming Lu
Opt. Express 18(24) 24994-24999 (2010)
Xiaoyu Liu, Shiliang Qu, Yang Tan, and Feng Chen
Appl. Opt. 50(6) 930-934 (2011)