Multichannel optical oscilloscope for sampling broadband free-space optoelectronic circuits

Rick L. Morrison; Steven G. Johnson; Anthony L. Lentine; Wayne H. Knox

doi:10.1117/12.235847

20 March 1996 Multichannel optical oscilloscope for sampling broadband free-space optoelectronic circuits

Rick L. Morrison, Steven G. Johnson, Anthony L. Lentine, Wayne H. Knox

Proceedings Volume 2692, Optical Interconnects in Broadband Switching Architectures; (1996) https://doi.org/10.1117/12.235847
Event: Photonics West '96, 1996, San Jose, CA, United States

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.

Citation Download Citation

Rick L. Morrison, Steven G. Johnson, Anthony L. Lentine, and Wayne H. Knox "Multichannel optical oscilloscope for sampling broadband free-space optoelectronic circuits", Proc. SPIE 2692, Optical Interconnects in Broadband Switching Architectures, (20 March 1996); https://doi.org/10.1117/12.235847

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KEYWORDS

Oscilloscopes

Video

Modulators

Channel projecting optics

Optoelectronics

Free space optics

CCD cameras

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