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Proceedings Paper

Multichannel optical oscilloscope for sampling broadband free-space optoelectronic circuits
Author(s): Rick L. Morrison; Steven G. Johnson; Anthony L. Lentine; Wayne H. Knox
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Paper Abstract

The advent of large-scale, free-space, opto-electronic interconnections, as demonstrated in recent system prototypes, requires new sampling methods to reveal diagnostic information. Several factors contribute to the difficulty of probing optical communications channels without disrupting their operation. High-speed electronic connections to the chip periphery are not available in sufficient number and would contribute an undesirable thermal load. Electronic and optical physical contact probes would obscure many of the optical channels that are relayed to a common surface of the chip in current systems. Optical sampling provides the better method although many standard techniques are either too time consuming or complex to implement. We describe a tool we developed that delivers diagnostic information on a large number of high-speed, optical data channels simultaneously and operates analogously to the conventional sampling electronic oscilloscope. The optical oscilloscope is constructed using CCD cameras and video capture boards that are controlled by a software application resident in a personal computer. Sampling is based on a stroboscopic method of using short pulsed laser probe beam synchronized to a data stream to illuminate optical modulators within the optoelectronic circuit. We have demonstrated and discuss the tool's capability of simultaneously monitoring arrays of broadband optoelectronic devices operating at speeds from several hundred Megabit/s to a few Gigabit/s.

Paper Details

Date Published: 20 March 1996
PDF: 6 pages
Proc. SPIE 2692, Optical Interconnects in Broadband Switching Architectures, (20 March 1996); doi: 10.1117/12.235847
Show Author Affiliations
Rick L. Morrison, AT&T Bell Labs. (United States)
Steven G. Johnson, Massachusetts Institute of Technology (United States)
Anthony L. Lentine, AT&T Bell Labs. (United States)
Wayne H. Knox, AT&T Bell Labs. (United States)

Published in SPIE Proceedings Vol. 2692:
Optical Interconnects in Broadband Switching Architectures
Thomas J. Cloonan, Editor(s)

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