Abstract: Certain aspects of the present disclosure provide a probe comprising a tube, wherein one or more optical fibers extend at least partially through the tube for transmitting at least one of a laser light and an illumination light from a light source to a target location. A distal end of the tube comprises a flat-walled morphology, and a protective window with a round edge is press-fit to the distal end. The flat-walled morphology of the distal end of the tube has a reduced diametric interference sensitivity, thus allowing a wider range of tolerances between the window and the tube walls for effective press-fitting.

Abstract: Certain aspects of the present disclosure provide a probe comprising a tube, wherein one or more optical fibers extend at least partially through the tube for transmitting at least one of a laser light and an illumination light from a light source to a target location. A distal end of the tube comprises a flat-walled morphology, and a protective window with a round edge is press-fit to the distal end. The flat-walled morphology of the distal end of the tube has a reduced diametric interference sensitivity, thus allowing a wider range of tolerances between the window and the tube walls for effective press-fitting.

Abstract: The present application is directed to a homogeneous laser light source having a temporally-variable seed source which includes at least one seed source configured to output at least one seed signal, the seed source configured to permit the user to selectively vary at least one temporal characteristic of the seed signal, at least one amplifier in communication with and configured to receive the seed signal and output at least one amplifier signal, at least one nonlinear optical generator is communication with the amplifier, the nonlinear optical generator configured to generate at least one homogeneous harmonic output signal in response to the amplifier signal, wherein the wavelength of the homogeneous harmonic output signal is different than the wavelength of the amplifier signal.

Abstract: The present application is directed to a homogeneous laser light source and includes at least one modeless seed source configured to output at least one modeless seed signal, at least one amplifier in communication with and configured to receive the modeless seed signal from the seed source and output at least one modeless amplifier signal, and at least one nonlinear optical generator configured to receive the amplifier signal and generate at least one modeless harmonic output signal in response to the modeless amplifier signal, wherein the wavelength of the harmonic output signal is different than a wavelength of the modeless amplifier signal.

Abstract: A plasma jet CVD system includes gas injectors and a stand-off ring. The gas injectors have outlet holes preferably flared to approach the expansion angle of the injected jet, thereby keeping the holes substantially free from entrained atomic hydrogen. The injectors are arranged counter-rotational to the swirl of the primary jet, providing a more uniform mixture of hydrocarbons and atomic hydrogen. The stand-off ring provides vents for cooler gases to enter the nozzle, thereby decreasing the overall temperature of the injectors and decreasing the temperature gradient experienced by the injectors, thereby preventing injector cracking. In addition the vents reduce shear, thereby increasing jet velocity and increasing the deposition rate for the coating.

Abstract: A gas injection disc is provided which includes an outer ring and a tubular modular insert which slips into the outer ring. The outer ring is provided with an inner bore, a ring-shaped plenum located around the inner bore, an outer gas sealing surface around the plenum, and two gas feed paths extending from the periphery of the outer ring to the plenum. The gas feed paths are each provided with a gas feed attachment for coupling gas supply tubes thereto. The insert is provided with a plurality of radially aligned injectant holes, an inner gas sealing surface, and an axial bore. The insert is seated in the inner bore of the outer ring such that the inner and outer gas sealing surface face each other with a small gap provided therebetween which enables the insertion of the insert into the inner bore. The insert thereby substantially encloses the plenum, and the injectant holes are aligned with the plenum to receive injectant gases and direct the injectant gases into the axial bore of the insert.

Abstract: A radiation and regeneratively cooled arc jet device includes improvements designed to provide higher gas enthalpy operation for thin diamond film deposition. A series of circumferentially and axially spaced gas injection holes are provided in the cylindrical inner walls of the arc chamber between a cathode and anode. This arc chamber wall is fabricated from a material having a high thermal shock parameter. The ratio of the spacing of the injection holes within each row as compared to the chamber diameter is set within a specific range. In the circumferential direction, a multiplicity of axial rows of holes are provided and spaced equally about the circumference of the chamber. The annular anode is isolated at the open end of the arc chamber by an insulator having a high thermal shock parameter, to conduct anticipated heat loads without mechanical failure.