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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

All-optical implementation of information shift on the basis of transverse effects in optical bistability

George V. Sinitsyn, Sergey P. Apanasevich, Andrey V. Lyakhnovich, Fedor V. Karpushko

Published Jul 12, 1993• 1 citation
Publisher

Abstract

A new method is presented for shifting optical information signals in the plane of optical bistable array in a direction normal to the direction of incident light beams. All-optical version of shift register and CCD memory device is experimentally demonstrated using semiconductor nonlinear interference filter. The possibility of creating more complicated optically controlled planar circuits and networks is shown.

DOI
10.1117/12.147878

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A new method is presented for shifting optical information signals in the plane of optical bistable array in a direction normal to the direction of incident light beams. All-optical version of shift register and CCD memory device is experimentally demonstrated using semiconductor nonlinear interference filter. The possibility of creating more complicated optically controlled planar circuits and networks is shown.
The nonlinear optical properties of many materials and devices have been the main object of research as potential candidates for sensing in different places. Just one of these properties has been, in most of the cases, the basis for the sensing operation. As a consequence, just one parameter can be detected. In this paper, although just one property will be employed too, we will show the possibility to sense different parameters with just one type of sensor. The way adopted in this work is the use of the optical bistability obtained from different photonic structures. Because this optical bistability has a strong dependence on many different parameters the possibility to sense different inputs appears. In our case, we will report the use of some non-linear optical devices, mainly Semiconductor Optical Amplifiers, as sensing elements. Because their outputs depend on many parameters, as the incident light wavelength, polarization, intensity and direction, applied voltage and feedback characteristics, they can be employed to detect, at the same time, different type of signals. This is because the way these different signals affect to the sensor response is very different too and appears under a different set of characteristics.
Self-defocusing of ordinary and extraordinary laser beams have been investigated in cadmium sulfide semiconductors in the near-band-edge absorption region. First it has been shown experimentally, that effects of the anisotropy nonlinear refraction induced by charge carriers created by single photon absorption is described whole set components of the third order nonlinear susceptibility tensor. New type of transverse optical bistability with increased amout of feedback due to nonlinear anisotropy was demonstrated.
We present a simple experiment which demonstrates the main features of intrinsic optical bistability obtained through thermally induced shifts in the band edge of semiconductor particles embedded in a glass matrix. This readily demonstrates how nonlinear optical effects can be used to transmit information, providing an instructive introduction to the main concepts of optical computing. Several possible extensions of the experiment suitable for advanced independent research projects are discussed.
The phenomenon of optical bistability (OB), including the so-called transverse effects in distributed OB-systems, offers additional opportunities for development of new architecture designs in optical systems of information processing and communications. In particular, this contribution deals with a class of all-optical multiplexers/demultiplexers (MDM) for data redirecting and processing in the nodes of fiber-optical communication channels and networks. Their specific features are dynamic connection remapping and the possibility of applying WDM/DWDM techniques. As switching elements optically nonlinear and bistable thin-film Fabry-Perot interferometers (TFI) are used. Thus the developed MDM are capable of operating at several wavelengths that correspond to the carrier frequency set of working bands of WDM/DWDM systems.