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Optical Engineering

Principle of operation of a refractive optical beam deflector and its properties as a photonic switch
Author(s): Masao Shimoji
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Paper Abstract

An optomechanical photonic switch that exploits the stationary property of the minimum deviation angle of a dispersive prism is described. The switch is based on an optical beam deflector consisting of an electric motor with hollow shaft. The tip of the motor is fitted with a dispersive prism and the deflected beam is focused onto pixels arranged around a circular scan track. It is shown that the proposed switch is, for all practical purposes, completely insensitive to mechanical wobble of the motor. Furthermore, the existing technology suggests that such a small-inertia motor with no external load may achieve speeds up to hundreds of thousands of revolutions per minute and beyond. We suggest one application of the switch as a write gate of a time slot interchanger in the time-division switching of pulse code modulation (PCM) codes. It is shown that the proposed switch can achieve speeds up to and exceeding hundreds of megabits per second.

Paper Details

Date Published: 1 June 1995
PDF: 7 pages
Opt. Eng. 34(6) doi: 10.1117/12.203115
Published in: Optical Engineering Volume 34, Issue 6
Show Author Affiliations
Masao Shimoji, California State Univ./Chico (United States)

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