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Proceedings Paper

Fabrication and optimization of one-to-two and two-to-two optical directional couplers in glass using a femtosecond laser
Author(s): Jiaren Liu; Zhiyi Zhang; Shoude Chang; Costel Flueraru; Chander Prakash Grover
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Paper Abstract

1x2 and 2x2 optical waveguide directional couplers were fabricated in a silica glass sample by a femtosecond laser and characterized at the wavelength of 1.5 μm. The coupling coefficient was determined by systematically writing series of 1x2 directional couplers. After the process and design optimization, the two types of waveguide directional couplers successfully achieved the coupling ratio of about 3.0 dB with the average IL and PDL 6.55 ± 0.25 dB and 0.28 ± 0.12 dB respectively. The multi-scan writing technique with inter-scan shifts was used to reshape the magnitude and profile of the refractive index change so that excess loss of S bends and the PDL for such couplers were substantially reduced.

Paper Details

Date Published: 20 December 2004
PDF: 7 pages
Proc. SPIE 5577, Photonics North 2004: Optical Components and Devices, (20 December 2004); doi: 10.1117/12.567083
Show Author Affiliations
Jiaren Liu, Institute for National Measurement Standards/NRC (Canada)
Zhiyi Zhang, Institute for National Measurement Standards/NRC (Canada)
Shoude Chang, Institute for National Measurement Standards/NRC (Canada)
Costel Flueraru, Institute for National Measurement Standards/NRC (Canada)
Chander Prakash Grover, Institute for National Measurement Standards/NRC (Canada)


Published in SPIE Proceedings Vol. 5577:
Photonics North 2004: Optical Components and Devices

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