Optical hysteresis in Fabry-Perot interferometer having intermediate layer of synthetic SiO2 opal which is filled with
nonlinear medium is simulated numerically. Bistable behavior and transverse nonlinear dynamics of transmitted and
reflected intensity are analyzed.
Switching of thin-film semiconductor Fabry-Perot with the resonance in visible region by short UV pulse is
demonstrated. Design of reconfigurable optical switch with wavelength conversion is discussed. Visualization and
analysis of the fine-structured UV images are possible, and resolution of the system for detecting minor local differences
of object and etalon images can be increased to submicron range.
Design of functional modules of optically reconfigurable routing unit for fiber optical networks is proposed. The peculiarity of these devices consists in realization of optical data transport by means of transverse switching waves in bistable layer. The modules allow to develop gateway units with channel and packet routing of information flows at data rate of ~40 Gb/s and can be scaled up to systems with a higher throughput due to technology of wavelength division multiplexing (WDMDWDM).
Several types of switches based on optically bistable (OB) thin Fabry-Perot interferometers are reviewed. Applications for time-division multiplexing are proposed and demonstrated experimentally using both separate OB pixels and those coupled by transverse effects in arrays of various types. Compatibility with modern WDM/DWDM fiber optical networks is discussed.
Design of all-optical packet switch with time division multiplexing for channel level of DWDM fiber networks is presented. Main feature of the device is the realization of data buffer on the basis of transverse interconnects within the 2D-array of optically bistable pixels. Functionality of key components of the switch is shown experimentally. Applications of such a device are discussed in the context of data rates and network services.
Technical parameters and main experimental features of laser complex for investigation of bistable phenomena in GaAs/GaAlAs interferometers and for modeling basic digital devices for optical signal processing (logical elements, switching devices, etc.) are reported.
All-optical data shift operation in a planar array based on transverse effects in optical bistability in an all-epitaxial GaAs/GaAlAs Fabry-Perot interferometer is reported. Transfer of information bit along a shift register takes about 6 ns.
Algorithms of designing planar shift optical arrays of hexagonal topology on the basis of a 4-pixel switching Y-nodes are considered. Y-node of micrometer size is realized experimentally with the use of optically bistable vacuum deposited ZnS interferometer.
Dynamics of switching waves in optically bistable all- epitaxial GaAs/GaAlAs Fabry-Perot interferometers is studied experimentally. Realization of planar optical shift register based on propagation of switching waves between neighbor pixels in the plane of bistable layer is proposed.
Principles of formation and controlled propagation of switching autowaves in optically bistable interference structures are considered. On this basis methods and devices are developed for read-in, storing, read-out, switching and transfer of information light signal sin the plane of 2D- arrays of nonlinear optical elements of micron size. A peculiarity of these methods is the possibility of shift data laterally in the array's plane in a direction that is perpendicular to the direction of incident light beams without its interim transformation into electrical signals. This distinctive feature enables developing new architecture concepts of optical information processing systems. Examples of numerical simulations and experimental realizations are presented of optical digital devices with a wide range of functional applications such as Boolean logic elements, shift registers, multiplexers/demultiplexers, basic planar ring processors, etc. The limiting operation parameters of the above devices are discussed.
Both theoretical and experimental analysis is carried out of dynamics describing the information data transfer over the ring by means of switching waves propagating in the plane of bistable layer in direction that is perpendicular to the direction of control and information laser beams. The design and experimental realization is reported of all-optical planar loop circuit demonstrator based on the nonlinear thin-film semiconductor interferometer in the framework of transverse `lock-and-clock' architecture. All-optical and optoelectronic `planar-free space' circuits of such kind can be used for the development and construction of optical systems for digital (and analog) processing, transfer and spatial switching of light information signals.
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.
In this contribution we focus on thermally induced absorptive optical nonlinearities in II-VI semiconductors. We demonstrate an optical oscillator by introducing the sample into a hybrid ring resonator with long round trip time. In the case of only marginally bistable input-output characteristics (realized with a CdS single crystal) we get the following dynamical behavior: For high input intensities the oscillation period is a multiple of the delay time. When decreasing the input intensity relaxation oscillations that stabilize the system and prevent it from a transition to deterministic chaos become important. Additionally we investigate the spatiotemporal dynamics of the system if a large diameter holding beam is switched by a small and short light pulse. Here we find switching waves and metastable temperature profiles.
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