Application of femtosecond pulsed laser for optical devices

Suk-Jae Jee; Jung-Sik Woo; Ik-Bu Sohn; ManSeop Lee

doi:10.1117/12.596339

8 October 2004 Application of femtosecond pulsed laser for optical devices

Suk-Jae Jee, Jung-Sik Woo, Ik-Bu Sohn, ManSeop Lee

Proceedings Volume 5662, Fifth International Symposium on Laser Precision Microfabrication; (2004) https://doi.org/10.1117/12.596339
Event: Fifth International Symposium on Laser Precision Microfabrication, 2004, Nara, Japan

Abstract

This paper presents the micro-machining results on optical devices by using Ti:sapphire femtosecond pulsed laser. It has been used successfully for the micro-machining of U-grooves in planar lightwave circuit (PLC) splitter, wedged filber and lensed fiber. U-grooves in PLC splitter is helpful to simplification of the alignment procedure between optical fiber and waveguide in the PLC chip. The insertion loss and the optical return loss of packaged 1 x 8 optical splitter modules which have been presented were less than 11.0 dB and more than 55 dB, respectively. These results also mean that the packaging technique using the passive alignment is excellent and femtosecond pulsed laser micro-machining technique could provide a new PLC packaging technology. The wedged fiber for reduction of reflection loss and the lensed fiber increasing coupling efficiency are also fabricated by laser system. A comparison of direct polishing method with that of laser micro-machining shows that laser technique is more favorable.

Citation Download Citation

Suk-Jae Jee, Jung-Sik Woo, Ik-Bu Sohn, and ManSeop Lee "Application of femtosecond pulsed laser for optical devices", Proc. SPIE 5662, Fifth International Symposium on Laser Precision Microfabrication, (8 October 2004); https://doi.org/10.1117/12.596339

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