Direct laser writing of near-IR step-index buried channel waveguides in rare earth doped YAG

Airan Rodenas, A. Benayas, John Robert MacDonald, J Zhang, D. Y. Tang, Daniel Jaque, A. K. Kar

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


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 1.55 mu m and 1.95 mu m are demonstrated by fabricating positive square step-index cores. Minimum propagation losses of 1.5 dB cm(-1) at a 1.51 mu m wavelength have been preliminarily obtained. Confocal microluminescence mapping reveals that the increased refractive index regions retain the near-IR spectral properties of Er(3+) ions in the YAG crystalline matrix. (C) 2011 Optical Society of America

Original languageEnglish
Pages (from-to)3395-3397
Number of pages3
JournalOptics Letters
Issue number17
Publication statusPublished - 1 Sep 2011



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