NDLI: Wafer-fused optoelectronics for switching

Content Provider	IEEE Xplore Digital Library
Author	Shakouri, A. Bin Liu Boo-Gyoun Kim Abraham, P. Jackson, A.W. Gossard, A.C.
Copyright Year	1983
Abstract	Wafer fusion technique for realization of compact waveguide switches and three-dimensional (3-D) photonic integrated circuits is investigated theoretically and experimentally. Calculations based on beam propagation method show that very short vertical directional couplers with coupling lengths from 40 to 220 /spl mu/m and high extinction ratios from 20 to 32 dB can be realized. These extinction ratios can be further improved using a slight asymmetry in waveguide structure. The optical loss at the fused interface is investigated. Comparison of the transmission loss in InGaAsP-based ridge-loaded waveguide structures with and without a fused layer near the core region, reveals an excess loss of 1.1 dB/cm at 1.55 /spl mu/m wavelength. Fused straight vertical directional couplers have been fabricated and characterized. Waveguides separated by 0.6 /spl mu/m gap layer exhibit a coupling length of 62 /spl mu/m and a switching voltage of about 2.2 V. Implications for GaAs-based fused couplers for 850 nm applications will also be discussed.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	2236
Ending Page	2242
Page Count	7
File Size	487812
File Format	PDF
ISSN	07338724
Volume Number	16
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical waveguides Optical losses Directional couplers Extinction ratio Propagation losses Waveguide theory Switching circuits Switches Photonic integrated circuits Optical propagation
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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