Thin hollow glass waveguide for near IR radiation delivery

Michal Němec; Helena Jelínková; Jan Šulc D.D.S.; Mitsunobu Miyagi; Katsumasa Iwai; Yi-Wei Shi; Yuji Matsuura

doi:10.1117/12.761837

7 February 2008 Thin hollow glass waveguide for near IR radiation delivery

Michal Němec, Helena Jelínková, Jan Šulc D.D.S., Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, Yuji Matsuura

Proceedings Volume 6852, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VIII; 68520W (2008) https://doi.org/10.1117/12.761837
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

The delivery of the radiation by thin fiber is required for some application, especially in medical internals treatment. Therefore a new 100 μm and 250 μm inner diameter hollow glass waveguides were developed and investigated for the possibility to transport high power near infrared laser radiation without damage of these delivery systems. As laser sources two Nd:YAG laser systems working in Q-switched regime at wavelength 1.06 μm and 1.34 μm were utilized. Delivered radiation characterization was performed. By Alexandrite laser (755 nm) pumped Q-switched Nd:YAG laser has been generating 1.06 μm wavelength radiation with 6 ns length of pulse and maximum output energy 0.7 mJ (116.7 kW). The laser was Q-switched using LiF:F^2- saturable absorber. Second laser system was Nd:YAG/V:YAG microchip pumped by laser diode operating at 808 nm. The radiation at 1.3 μm wavelength has been generated with 250 Hz repetition rate. Pulse length was 6 ns and mean output power 25 mW. Corresponding pulse energy and peak power was 0.1 mJ and 16.7 kW, respectively. Both lasers were operating in fundamental TEM₀₀ mode (M² ~ 1). For delivery a special cyclic olefin polymer-coated silver hollow glass waveguides with the inner/outer diameters 100/190 μm and 250/360 μm were used. The delivery system was consisted of lens, protector, and waveguide. As results the transmission more than 55% and reasonable spatial profile of laser output radiation were found. From these measurements it can be recommended using of this system for near infrared powerful radiation delivery as well as for medical treatment.

Citation Download Citation

Michal Němec, Helena Jelínková, Jan Šulc D.D.S., Mitsunobu Miyagi, Katsumasa Iwai, Yi-Wei Shi, and Yuji Matsuura "Thin hollow glass waveguide for near IR radiation delivery", Proc. SPIE 6852, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications VIII, 68520W (7 February 2008); https://doi.org/10.1117/12.761837

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Waveguides

Glasses

Nd:YAG lasers

Semiconductor lasers

Laser dentistry

Laser systems engineering

Crystals

Show All Keywords

Keywords/Phrases

Search In:

Publication Years