Fabrication of optical splitter and passive alignment technique with a femtosecond laser

A novel packaging process using a femtosecond laser has been developed for passive alignment of planar lightwave circuit devices. With only one step of micromachining, optical splitter and U-grooves for fiber aligning are simultaneously defined on fused silica glass. The fiber aligned optical splitt...

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Bibliographic Details
Published in:IEEE photonics technology letters 2005-11, Vol.17 (11), p.2349-2351
Main Authors: Sohn, Ik-Bu, Lee, Man-Seop, Chung, Jeong-Yong
Format: Article
Language:English
Subjects:
Alignment
Circuits
Femtosecond
Femtosecond (fs) laser
Fiber lasers
Glass
laser materials-processing applications
Lasers
Micromachining
Noise levels
Optical device fabrication
Optical fiber devices
Optical fiber losses
Optical fibers
optical planar waveguide
Packaging
passive alignment
Silicon compounds
Splitting
Ultrafast optics
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Summary:A novel packaging process using a femtosecond laser has been developed for passive alignment of planar lightwave circuit devices. With only one step of micromachining, optical splitter and U-grooves for fiber aligning are simultaneously defined on fused silica glass. The fiber aligned optical splitter has a low insertion loss, less than 4 dB, including an intrinsic splitting loss of 3 dB and excess loss due to the passive alignment of a single-mode fiber. Finally, the output field pattern is presented, demonstrating the splitting ratio of the optical splitter is approximately 1 : 1.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2005.858101