Control of the cross-sectional shape of a hollow microchannel embedded in photostructurable glass by use of a femtosecond laser (original) (raw)
- Optics Letters
- Vol. 28,
- Issue 1,
- pp. 55-57
- (2003)
- •https://doi.org/10.1364/OL.28.000055
Ya Cheng, Koji Sugioka, Katsumi Midorikawa, Masashi Masuda, Koichi Toyoda, Masako Kawachi, and Kazuhiko Shihoyama
Author Affiliations
Ya Cheng,1Koji Sugioka,1Katsumi Midorikawa,1Masashi Masuda,2Koichi Toyoda,2Masako Kawachi,3and Kazuhiko Shihoyama3
1RIKEN, The Institute of Physical and Chemical Research, Hirosawa 2-1, Wako, Saitama 351-0198, Japan
2Tokyo University of Science, Yamazaki 2641, Noda, Chiba 278-8510, Japan
3HOYA CONTINUUM CORPORATION, Hikawacho 3-5-24, Toda, Saitama 335-0027, Japan
Corresponding author: ycheng@postman.riken.go.jp, ksugioka@postman.riken.go.jp
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Abstract
Theoretical and experimental investigations have been made of the three-dimensional microchannel fabrication of photostructurable glass by use of a femtosecond (fs) laser. Generally, a microchannel fabricated inside glass by the scanning focal spot of a fs laser perpendicular to the direction of laser propagation assumes an elliptical shape with a cross section of large aspect ratio. We demonstrate that one can greatly reduce the aspect ratio merely by inserting a slit, which is oriented parallel to the laser’s scanning direction, before the focusing lens. Computer simulations show that a more symmetrical pattern is obtained in the vicinity of the focal point with the help of such a slit, owing essentially to a diffraction effect.
© 2003 Optical Society of America
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