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Proceedings Paper

Design and fabrication of low-loss hydrogenated amorphous silicon overlay DBR for glass waveguide devices
Author(s): Jaeyoun Kim; Kim Allen Winick; Catalin Florea; Michael McCoy
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Paper Abstract

We report the use of amorphous silicon (a-Si) and hydrogenated amorphous silicon (a-Si:H) overlays to fabricate low-loss distributed Bragg reflectors (DBRs) for active and passive glass waveguide devices. Overlay material issues, overlay DBR design procedures, and fabrication details are presented. We apply the technology to implement a multiple-wavelength source using an array of overlay DBR waveguide lasers on a single Er/Yb doped, ion exchanged, glass substrate. The lasing wavelengths of the laser array are linearly related to the width of the ion-exchange mask openings. One laser with a 8.5 mm long gain section and a 1.5 mm long overlay DBR had a launched pump power threshold of 29 mW and a 8.5% slope efficiency. We also fabricated a Mach-Zehnder-based, ion exchanged, glass waveguide, optical add-drop multiplexer (OADM) using an a-Si overlay DBR. The 3 cm long OADM exhibited a 24 dB transmission dip with a 3 dB bandwidth of 0.5 nm at the drop wavelength. The throughput loss of the OADM, excluding input and output coupling losses, was approximately 1.9 dB. Theory and measurement results are in good agreement for both the laser array and the OADM.

Paper Details

Date Published: 17 June 2003
PDF: 10 pages
Proc. SPIE 4990, Rare-Earth-Doped Materials and Devices VII, (17 June 2003); doi: 10.1117/12.502291
Show Author Affiliations
Jaeyoun Kim, Univ. of Michigan (United States)
Kim Allen Winick, Univ. of Michigan (United States)
Catalin Florea, IMRA America (United States)
Michael McCoy, Sage Electrochromics (United States)

Published in SPIE Proceedings Vol. 4990:
Rare-Earth-Doped Materials and Devices VII
Shibin Jiang; Jacques Lucas, Editor(s)

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