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15 January 1996 Design and fabrication of a 3x3 optoelectronic integrated switch
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Proceedings Volume 2611, Optical Network Engineering and Integrity; (1996) https://doi.org/10.1117/12.230102
Event: Photonics East '95, 1995, Philadelphia, PA, United States
Abstract
With the increasing number of optical networks comes a growing demand for hardware to allow management of interconnections. One of the important elements in a network is the cross-point switch. In this presentation, we describe a GaAs 3 multiplied by 3 optoelectronic switch based on a monolithic optoelectronic integrated circuit which combines a receiver array of MSM photodetectors and three transimpedance amplifiers providing gain for the three output channels. The 3 multiplied by 3 matrix of photodetectors acts at the switching element. The three electrical output channels from this receiver are amplified further by MIC circuits using chip amplifiers. This restores the signal to a level sufficient to drive semiconductor lasers thereby converting the electrical signal back to an optical signal for use as an optical- optical router. A critical step in the switch construction is the delivery of the optical signals to the photodetectors. A special mount was designed and fabricated to support and align the 9 fibers in front of their respective detectors. The switch was evaluated in terms of the responsivity, the isolation and the cross-talk. The overall responsivity exceeds 20 A/W with a bandwidth of 400 MHz, limited by the speed of the detectors. The isolation varies between 33 and 55 dB and depends on the device selected and on the bias condition of the detector in the off-state. The operation of the switch was demonstrated using three television signals.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Francois L. Gouin, Christian Beaulieu, and Julian P. Noad "Design and fabrication of a 3x3 optoelectronic integrated switch", Proc. SPIE 2611, Optical Network Engineering and Integrity, (15 January 1996); https://doi.org/10.1117/12.230102
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