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

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3 Author(s)
Ik-Bu Sohn ; Opt. Network & Syst. Lab., Inf. & Commun. Univ., Daejeon, South Korea ; Man-Seop Lee ; Jeong-Yong Chung

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.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 11 )