Abstract
In the area of optical logic and optical information processing, such nonlinear optical devices as optical Instability, optical amplifier, and optical limiter are important basic elements. In this paper, the hybrid optical bistability and optical limiter characteristics are realized by means of an electrical linear feedback to a ferroelectric liquid crystal cell (SSFLC cell). If the feedback gain is positive, the optical bistability is obtained while the optical limiter characteristics are obtained if the gain is negative. Also, it was demonstrated that by instantaneously increasing or cutting the incident optical intensity in a pulsed state in the optical bistability region, the transmission light intensity can be switched from the low-transmission state to the high-transmission state or from the high- to low-transmission state. The minimum pulsewidth needed for switching is 70 μs for the low-transmission state to the high-transmission state and 50 μs for the high-transmission state to the low-transmission state. Since the speed is very fast, the high-speed response of the ferroelectric liquid crystal is used effectively.
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