10 March 1987 Guided Wave Optical Power Regulator
Author Affiliations +
Proceedings Volume 0704, Integrated Optical Circuit Engineering IV; (1987) https://doi.org/10.1117/12.937189
Event: Cambridge Symposium-Fiber/LASE '86, 1986, Cambridge, MA, United States
An integrated optic device is described which acts as the optical analog of a voltage regulator or, more precisely, a tunable voltage source. This device is suitable for stabilizing a fluctuating optical intensity or for providing a tunable power source with immunity to input power variations. An incoming optical signal is beamsplit by a tunable directional coupler (the control element), the output channel of which is further sampled by an additional coupler (the monitor element) and the intensity is compared to a reference level. The resulting error signal, suitably amplified, serves to adjust the first coupler, driving the output intensity to the reference level in a negative feedback loop. The design and performance of a device fabricated in Ti-indiffused lithium niobate is discussed.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David A. Smith, "Guided Wave Optical Power Regulator", Proc. SPIE 0704, Integrated Optical Circuit Engineering IV, (10 March 1987); doi: 10.1117/12.937189; https://doi.org/10.1117/12.937189

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