Metrology Based on Chaotic Semiconductor Lasers
On the way to chaotic evolution, periodicity, bistability, and multistability are observed, such as in the outputs of semiconductor lasers with optical feedback. The system of optical feedback in a semiconductor laser is sometimes called self-mixing semiconductor laser. In a periodic state, the laser output shows not simply periodic oscillation but also hysteresis. Novel applications have been proposed based on these phenomena, for example, a displacement measurement is performed by counting the fringes obtained from bistable self-mixing interference between the internal field and the optical feedback light in the laser cavity. The direction of the displacement is simultaneously determined from asymmetric waveforms showing hysteresis.
KeywordsSemiconductor Laser Laser Output Chaotic Oscillation Optical Feedback Laser Output Power
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