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Proceedings Paper

Widely tunable Fabry-Perot filters using high-index-contrast DBRs
Author(s): Parviz P. Tayebati; P. D. Wang; Daryoosh Vakhshoori; Masud Azimi; Manoj Kanskar; Robert N. Sacks
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Paper Abstract

Realization of microelectromechanically wavelength tunable Fabry-Perot filters using high index-contrast distributed Bragg reflectors (DBRs) comprising GaAlAs/AlOx and Si/SiO2 material system are reported. Due to the broadband nature of these high index-contrast DBRs, the 3dB transmission bandwidth of the cavity resonance is narrow and stable over the tuning range. While the three different sets of GaAlAs/AlOx based filters with different number of DBRs exhibited linewidths of 0.5nm, 2.0nm and 0.47nm with tuning ranges of 59nm, 83nm, and 60nm respectively, the silicon-based filter exhibited a linewidth of 0.3nm and a tuning range of 12nm. Transmission spectra from these devices displayed varying magnitudes of higher order spatial modes were attributed to lensing effect caused by partially oxidized AlGaAs layers within the mirror layers. One of the GaAlAs filters showed a frequency response of 500 KHz at 3dB cutoff point indicating a switching time of 2 microseconds.

Paper Details

Date Published: 1 February 1998
PDF: 13 pages
Proc. SPIE 3234, Design and Manufacturing of WDM Devices, (1 February 1998); doi: 10.1117/12.300929
Show Author Affiliations
Parviz P. Tayebati, CoreTek, Inc. (United States)
P. D. Wang, CoreTek, Inc. (United States)
Daryoosh Vakhshoori, CoreTek, Inc. (United States)
Masud Azimi, CoreTek, Inc. (United States)
Manoj Kanskar, CoreTek, Inc. (United States)
Robert N. Sacks, The Ohio State Univ. (United States)

Published in SPIE Proceedings Vol. 3234:
Design and Manufacturing of WDM Devices
Ray T. Chen; Louis S. Lome, Editor(s)

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