Abstract: For the trimming of an arrayed waveguide grating (1) of an integrated optical multi-beam interferometer which is comprised of a large number (N) of waveguides (i) at least one (j) of these waveguides (i) is treated over a region (Bj) along its optical path length (Lj) only by irradiation which changes its core refractive index (nj) A defined phase shift (&Dgr;&phgr;j) of the light signal guided in this waveguide (j) results thereby which leads to a long-lasting correction of the aberration of the interference pattern in the multi-beam interferometer.

Abstract: An excimer laser system having a laser chamber containing elongated electrodes and an excimer laser gas and a high voltage pulse power supply having fine digital regulation for supplying high voltage electrical pulses to the electrodes. The high voltage pulse power supply includes a power supply and a magnetic switch circuit for compressing and amplifying the output of the power supply. The power supply includes a silicon controlled rectifier which provides a direct current output to an inverter which converts the output of the silicon controlled rectifier to high frequency alternating current which is in turn amplified by a step up transformer. An output stage diode rectifier in combination with an inductor converts this high frequency high voltage current back to direct current. A control board comprising electronic circuits controls the power supply to provide high voltage pulses at a frequency of at least 1000 Hz.

Abstract: The apparatus of this invention redirects light input to the apparatus without significant light loss, and preferably without increasing the light's etendue. The apparatus includes a light guide and a redirection member. The member has input, output and reflective surfaces. The member's input surface is joined to the light guide to define an interface, and the member's output surface is situated adjacent to a medium that can be another light guide or redirection member, a gas such as ambient air, or a vacuum, for example. The member is configured to redirect light traveling in the light guide from its reflective surface by a predetermined redirection angle.

Abstract: A microelectronic module comprising at least two chips mounted to a chip receiving surface. Each chip having an edge including at least one chip input and one chip output. The chips are arranged such that the edge of one chip is opposite the edge of the other chip. The chips are spaced apart by a predetermined distance. Each chip includes at least one optical transmitter attached to the edge of the chip. The transmitter has an input coupled to the chip output and a transmission portion for generating optical signals at a predetermined angle and that are representative of signals inputted to the transmitter input. The microelectronic module further includes at least one optical receiver attached to the edge of the chip. The optical receiver has an output coupled to the chip input and a receiving portion for directly receiving optical signals generated by a corresponding optical transmitter of the other chip. The optical receiver and the corresponding optical transmitter form a transmitter/receiver pair.

Abstract: A compact semiconductor laser light source providing short wavelength (ultraviolet, blue or green) coherent light by means of frequency doubling of red or infrared light from a high power diode heterostructure. The high power diode heterostructure is a MOPA device having a single mode laser oscillator followed by a multimode, preferably flared, optical power amplifier. A tunable configuration having an external rear reflector grating could also be used. A lens could be integrated with the MOPA to laterally collimate the light before it is emitted. Straight or curved, surface emitting gratings could also be incorporated. An astigmatism-correcting lens system having at least one cylindrical lens surface is disposed in the path of the output from the MOPA to provide a beam with substantially equal lateral and transverse beam width dimensions and beam divergence angles. A nonlinear optical crystal or waveguide is placed in the path of the astigmatism-free symmetrized beam to double the frequency of the light.

Abstract: An apparatus for direct optical reception of a plurality of wavelengths which includes a substrate having a waveguide disposed thereon for conducting the wavelengths, a waveguiding wavelength demultiplexer being integrated on the substrate for spreading the wavelengths into separate channels extending to separate opto-electronic detectors which are preferably integrated on the substrate. The device further includes an integrated transmitter so the device is a bi-directional functional unit having both an integrated transmitter and integrated direct receiver.

Abstract: A network for distributing a set of independent high-frequency electrical signals comprises an optical rail waveguide that is fed with a measured amount of optical power from a single source, and a set of optical railtaps positioned at sequential locations along the optical rail waveguide. Each optical railtap functions to extract a corresponding specified fraction of the measured amount of optical power from the optical rail waveguide when a corresponding one of the independent electrical signals is applied thereto. The fractions of the measured amount of optical power extracted from the optical rail waveguide at the corresponding sequential locations along the optical rail waveguide constitute a set of independent high-frequency optical signals, which correspond to the independent high-frequency electrical signals.

Abstract: A connector assembly for blind mated back plane interface connections of optic fibers with active optical devices includes a shroud mounted in a back plane panel within which are received a receptacle assembly mated to connector modules. The modules, each associated with a cable of a plurality of optical fibers, subdivide the mated fibers into separately connected groups to avoid expensive tolerance requirements. The receptacle includes a housing and shims for precisely locating the active optical devices relative to the ends of the optic fibers. The interface connections are shielded from interference by conduction between the receptacle housing, a fiber termination ferrule and a rear housing and strain relief portion of each connector module.