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Optics Communications

An integrated acousto-optic bistable device

Hubert Jerominek, J.Y.D. Pomerleau, Réal Tremblay, Claude A. Delisle

Published Aug 1, 1984• 9 citations
Publisher
DOI
10.1016/0030-4018(84)90272-4

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Previous research with acousto-optic hybrid optical/electronic (HOE) bistable devices has been directed towards operation in the first Bragg regime.1 We have demonstrated several simulations and experiments to study a HOE bistable system in the second Bragg regime. In this bistable system, the acousto-optic device operates in the second order with the light incident at twice the Bragg angle. To achieve optical bistability, the second order diffracted light is detected by a photodetector, amplified with a linear amplifier, summed with a bias voltage, and feedback to the acousto-optic device. The operation of the acousto-optic device can be explained by a set of coupled differential equations. Likewise, the feedback loop can be modeled with a feedback equation. The simultaneous solution of these equations provided our theoretical model. In this talk, we will compare theoretical and experimental results, as well as compare first order and second order operation.

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In this paper, a computer-aided simulation of the relation between peak phase delay and laserintensity ,at different values of the Klein-Cook parameter of the fourth order diffraction, waspresented. The numerical results describing the sound-light interaction in LiNbO3 crystal withand without feedback were presented and discussed. Also, the relations between laserintensities and the acousto-optic frequency and the values of Klein-Cook parameter werestudied. The results were applied to an optical bistable device using MATLAB software.

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Bistable Optical Devices

P. W. E. Smith

Springer eBooks•Jan 1, 1984•3 citations
Previous research with acousto-optic hybrid optical/electronic (HOE) bistable devices has been directed towards operation in the first Bragg regime.1 We have demonstrated several simulations and experiments to study a HOE bistable system in the second Bragg regime. In this bistable system, the acousto-optic device operates in the second order with the light incident at twice the Bragg angle. To achieve optical bistability, the second order diffracted light is detected by a photodetector, amplified with a linear amplifier, summed with a bias voltage, and feedback to the acousto-optic device. The operation of the acousto-optic device can be explained by a set of coupled differential equations. Likewise, the feedback loop can be modeled with a feedback equation. The simultaneous solution of these equations provided our theoretical model. In this talk, we will compare theoretical and experimental results, as well as compare first order and second order operation.
In this paper we report for the first time the presence of bistability in an acoustic-optic tunable filter (AOTF) operating with ultrashort (2 ps) optical light pulses. The results for the study of bistability has shown the dependence of the hysteresis curve with the product of the coupling constant (κ) by the length of the device (ξL) and the conversion power-coupling constant factor (G). The range of bistability varies significantly with both G and with κξL parameters. The variation of κξL directly increases the size of the range of bistability hysteresis while the increase in G causes the bistability to occur at low powers. The phenomenon of optical bistability (OB) is the object of increasing interest due to its possibilities for important device applications. A bistable device is a device with a capability to generate two different outputs for a given input and the physical requirements for this are an intensity-dependence refractive index and an optical feedback mechanism.
In this paper, a computer-aided simulation of the relation between peak phase delay and laserintensity ,at different values of the Klein-Cook parameter of the fourth order diffraction, waspresented. The numerical results describing the sound-light interaction in LiNbO3 crystal withand without feedback were presented and discussed. Also, the relations between laserintensities and the acousto-optic frequency and the values of Klein-Cook parameter werestudied. The results were applied to an optical bistable device using MATLAB software.