Abstract: An embedded device (10) for processing man-machine interface (MMI) operations includes a firmware module (20) and a description module (30). The firmware module is for implementing all functions of the embedded device, and includes an MMI kernel (200) for receiving and processing operation commands and displaying corresponding pictures. The MMI kernel includes a reading module (210), a storage module (220) connected to the reading module, and a drawing module (230) connected to the storage module. The description module is connected to the MMI kernel, and is used for saving description data of the pictures displayed by the MMI kernel. The reading module is for reading the description data saved in the description module. The storage module is for saving the description data read by the reading module. The drawing module is for searching description data corresponding to the operation commands and creating pictures according to the searched description data.

Abstract: The encoder/decoder design for spectrum-encoded optical CDMA systems uses waveguide circuits monolithically integrated on one chip to fulfill essential encoding and decoding functions. The integrated device functions as a 1×2 wavelength selective Mach-Zehnder interferometer switch to encode the input broadband light source and to decode the transmitted spectrally encoded signals. The device comprises a frontal 3-dB coupler, a double-ended arrayed-waveguide grating (AWG), and arrays of thermooptic phase shifters and attenuators, together with their symmetric images reflected from the high-reflection coated facet, to realize all required functionality. The thermooptic phase shifters and attenuators are programmable through electronic interface to realize programmable encoding and decoding capabilities. The attenuators are used to equalize the powers and to increase the ON/OFF extinction ratio of all spectral chips.

Abstract: A timing jitter measurement system and method is provided that acquires the timing jitter in an all-optical fashion, by extracting the timing jitter probability distribution function using auto-correlation and cross-correlation data. This makes the system and method of the present invention particularly useful for ultra-high bit rates, where power spectrum analysis cannot be applied. The resolution of the timing jitter measurement system and method is higher than the actual pulse width, and depends on the time resolution of the correlator. The system and method of the present invention facilitates the identification of deterministic or random timing jitters or combinations thereof, and therefore can be used to identify the origins of timing jitters within the optical network and to provide feedback to the optical network that can be used to actively control the timing jitter.

Abstract: A real time multi-channel wavelength monitoring circuit for monitoring Waveguide Division Multiplexing communications networks (WDM) is disclosed. The monitoring circuit monitors the full wavelength of an input signal by providing center offset inputs into a Phased Array Waveguide Grating (PAWG). By providing center offset inputs to a PAWG the passband crossover point can be changed optimizing a different dynamic range and wavelength resolution.

Abstract: A method of making Y couplers and grating optical waveguides of the present invention comprises exposing the polydiacetylene to an e-beam or a similar exposing means causing a change in the index of refraction of the polydiacetylene. In the case of e-beam exposure, the optical component patent is produced by directly controlling the e-beam which does not require any physical and/or chemical preparation of the polydiacetylene. The depth of penetration of the e-beam is controlled by the scanning rate and intensity of the e-beam. The optical gratings, fabricated by e-beam exposure technique, also inherit nonlinear optical properties which can be utilized in nonlinear optical applications.

Abstract: An optical device used as an optical switch or bistable device, with surface plasmons, is comprised of a semiconductor base material forming a non-linear dielectric layer along with a metal layer, with an interface between the metal and semiconductor layers including a submicron grating. The device is optically excited from a light source of given intensity. In accordance with the invention, dispersion relation of surface plasmons may be changed by varying the intensity of an input laser so as to provide bistable or hysteresis effect switching. The concepts of the invention may be implemented in either an unadorned device as set forth, or may be fabricated in an optical waveguide.

Abstract: An optical waveguide coupling device which can perform switching functions by changing input light intensity, and associated method of construction thereof, in which the device comprises a base substrate etched to provide an optical grating having a predetermined grating period and amplitude. A thin metal film is deposited on the grating. Subsequently, a polymer film is deposited over the thin metal film, thus forming an optical waveguide. The field for the waveguide mode is nearly zero at the metal-polymer film interface, thus eliminating the loss of energy in the thin metal film. The metal film, in essence, reflects the input beam so that substantially no energy is lost via transmission through the thin metal film and thus all available energy is for coupling into the waveguide mode.