Fabrication of robust hollow waveguide devices for Er:YAG laser light

You Wang, Hajime Hiraga, Yuji Matsuura, Mitsunobu Miyagi

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


We report transmission properties of two kinds of robust bent hollow stainless steel (St) waveguides whose inner surface is coated by the thin silver (Ag) and fluorocarbon- polymer (FCP) layers. The bore size of the waveguides is 700 micrometer and all types of waveguides have been fabricated based on the liquid phase process, i.e., the process of silver mirror reaction for the silver layer and liquid flow- coating method for the fluorocarbon polymer layer. Measurements have been conducted for the fixed bent FCP- coated Ag hollow St waveguides with the length of 3 cm and the bending angles of 20 and 70 degrees, respectively for Er:YAG laser light. It turned out that the losses of 0.8 dB and 0.7 dB have been attained for the above 20 degree and 70 degree structures, respectively. As the St tube itself has the very robust structure and high heat conductivity compared with the corresponding glass hollow waveguide, the waveguide devices proposed in this paper will open a new application in medicine.

Original languageEnglish
Pages (from-to)36-40
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1997
EventSpecialty Fiber Optics for Biomedical and Industrial Applications - San Jose, CA, United States
Duration: 1997 Feb 101997 Feb 10


  • Dielectric-coated hollow waveguide
  • Er:YAG laser
  • Fluorocarbon-polymer (FCP)
  • Hollow waveguide
  • Stainless steel


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