Abstract: A particle detector includes an input port for receiving gas and particulate matter. A charging source generating positively and negatively charged species that charges at least some particulate matter in charging region, thereby generating a plurality of charged particles. A trapping region is formed having a potential energy minimum that attracts and confines the plurality of charged particles. A detector detects charged particles in the trapping region.

Abstract: The present invention relates to a plasma generator that generates a plasma with a multi-step ionization process. The plasma generator includes an excited atom source that generates excited atoms from ground state atoms supplied by a feed gas source. A plasma chamber confines a volume of excited atoms generated by the excited atom source. An energy source is coupled to the volume of excited atoms confined by the plasma chamber. The energy source raises an energy of excited atoms in the volume of excited atoms so that at least a portion of the excited atoms in the volume of excited atoms is ionized, thereby generating a plasma with a multi-step ionization process.

Abstract: The plasma source includes a cathode assembly having an inner cathode section and an outer cathode section. An anode is positioned adjacent to the outer cathode section so as to form a gap there between. A first power supply generates a first electric field across the gap between the anode and the outer cathode section. The first electric field ionizes a volume of feed gas that is located in the gap, thereby generating an initial plasma. A second power supply generates a second electric field proximate to the inner cathode section. The second electric field super-ionizes the initial plasma to generate a plasma comprising a higher density of ions than the initial plasma.

Abstract: An ion storage system is described that includes an ion trap that defines a volume for storing a plurality of ions. A radio frequency (RF) generator is electromagnetically coupled to the volume defined by the ion trap. The RF generator generates an RF electrical field that stores the plurality of ions in the ion trap. A switching device terminates the RF electrical field, which ejects the plurality of ions from the ion trap. An ion detector detects at least a portion of the plurality of ions that are ejected from the ion trap.

Abstract: An acousto-optic tunable filter that includes a polarization beamsplitter, a multi-segment interaction region and a polarization beam combiner is described. The polarization beamsplitter generates a first and a second polarized optical signal. The multi-segment optical interaction region includes a first optical interaction region and a first acoustic wave generator that generates acoustic waves in the first optical interaction region. The multi-segment optical interaction region also includes a second optical interaction region that is non-collinear relative to the first optical interaction region and a second acoustic wave generator that generates acoustic waves in the second optical interaction region. Optical signals that are phase-matched to the acoustic waves are mode-converted in response to the acoustic waves. The acousto-optic tunable filter also includes a polarization beam combiner that generates both a mode-converted optical signal and a non-mode-converted optical signal.

Abstract: A climbing-traversing wall, designed to be installed as one of a group, is constructed with two opposite-facing surfaces positioned about a vertical axis such that the climbing wall may be pivoted about its central axis thus allowing the group of climbing walls to be adjusted to a variety of maze-like configurations.

Abstract: A deposition system is described. The deposition system includes a deposition source that generates deposition flux comprising neutral atoms and molecules. A shield defining an aperture is positioned in the path of the deposition flux. The shield passes the deposition flux through the aperture and substantially blocks the deposition flux from propagating past the shield everywhere else. A substrate support is positioned adjacent to the shield. A dual-scanning system scans the substrate support relative to the aperture with a first and a second motion.

Abstract: The invention relates to apparatus and methods for suppressing high frequency resonance in an electro-optical device. The electro-optical device includes an optical waveguide formed in the upper surface of a substrate. The device further includes a plurality of electrically floating electrode segments that are positioned on the substrate to intensify an electric field in the optical waveguide. The device also includes a plurality of electrically grounded electrode segments that are positioned on the substrate for prohibiting modal conversion and propagation of high order modes in the plurality of electrically grounded electrode segments and in the plurality of electrically floating electrode segments, thereby suppressing modal coupling to the substrate. The device further includes a buffer layer formed on the upper surface of the substrate and a driving electrode formed on an upper surface of the buffer layer for receiving an RF signal that induces the electric field in the optical waveguide.

Abstract: A method of determining thickness and refractive index of an optical thin film is described. The method includes generating a diagnostic light beam having a first and a second wavelength. The method also includes measuring unattenuated light intensities at the first and the second wavelength of the diagnostic light beam. The method also includes measuring attenuated light intensities at the first and the second wavelength of the diagnostic light beam after transmission through the optical thin film. A null light intensity for the diagnostic light beam at the first and second wavelength is also determined. A first and second normalized intensity function is determined using the measured unattenuated light intensities, the measured attenuated light intensities, and the measured null light intensities. The thickness and refractive index of the optical thin film is then determined by solving the first and second normalized intensity function for thickness and refractive index.

Abstract: An optical data transmitter is described that includes a precoder that converts an input data signal to a binary precoded data signal and to a complementary binary precoded data signal. A delay element delays one of the complementary binary precoded data signal and the binary precoded data signal relative to the other by a time corresponding to less than one bit period of the binary precoded data signal. A differential amplifier converts the binary precoded data signal and the complementary binary precoded data signal to a four-level data signal and to a complementary four-level data signal. An optical data modulator modulates an amplitude of an optical signal applied to an optical input of the optical data modulator in response to at least one of the four-level data signal and the complementary four-level data signal to generate a modulated optical output signal.

Abstract: An optical power and wavelength monitor of an optical beam is described. The monitor includes a first detector positioned in the path of the optical beam that generates a first electrical signal that is proportional to an optical power of the optical beam. The monitor also includes an optical filter that is positioned in the path of the optical beam. The optical filter transmits a portion of the optical beam having a wavelength within a bandwidth of the optical filter. A second detector that is positioned in the path of the optical beam generates a second electrical signal that is proportional to an optical power of the filtered optical beam. A signal processor receives the first and second electrical signals and generates a signal that is proportional to the wavelength of the optical beam.

Abstract: A high-efficiency electro-optic modulator with an equalized frequency response is described. The modulator includes an optical waveguide formed in an electro-optic material that propagates an optical signal along a first direction of propagation. An electrical waveguide is formed on the electro-optic material and positioned generally co-linear relative to the optical waveguide and in electromagnetic communication with the optical waveguide. The geometry of the electrical waveguide is selected to achieve a modulation efficiency at a frequency in a bandwidth of a digital spectrum. A compensation network is electrically coupled to the electrical waveguide at a junction. The compensation network reduces an electro-optic response of the electro-optic modulator below the mean frequency bandwidth of the digital spectrum, thereby causing an increase of the electro-optic response above the mean frequency of the digital spectrum.

Abstract: An apparatus and method for cleaving optical waveguides to precise differential length are described. A first end of a waveguide is coupled to an input port of a reflectometer. A reference mirror is then positioned in a path of radiation propagating through the second end of the waveguide. A waveguide cutting tool is then positioned proximate to the waveguide and at a distance relative to a reference mirror. A first reflectometry measurement is performed on the waveguide to a second end of the waveguide. A second reflectometry measurement is performed on the waveguide to the reference mirror. The waveguide is then positioned relative to the reference mirror and waveguide cutting tool so that the first reflectometery measurement is a measurement increment apart from the second reflectometry measurement. The waveguide is then cut with the cutting tool positioned at the distance relative to the reference mirror.

Abstract: A radial flow turbomolecular vacuum pump includes a gas inlet, a gas outlet, a rotor, and a stator. The rotor includes a first rotor surface that is positioned in a substantially radial direction. A plurality of blades extends from the first rotor surface in a substantially axial direction. The stator includes a first stator surface that is positioned proximate to the first rotor surface in the substantially radial direction. A first and second plurality of vanes extend from the first stator surface and generally forms an annulus therebetween for receiving the first plurality of blades. A drive shaft is coupled to the rotor and positioned in the substantially axial direction. A motor is coupled to the drive shaft and rotates the rotor relative to the stator. The rotation of the rotor relative to the stator causes gas to be pumped from the gas inlet to the gas outlet in the substantially radial direction.

Abstract: A differentially pumped deposition system is described that includes a deposition source, such as a magnetron sputtering source, that is positioned in a first chamber. The deposition source generates deposition flux comprising neutral atoms and molecules. A shield that defines an aperture is positioned in the path of the deposition flux. The shield passes the deposition flux though the aperture and substantially blocks the deposition flux from propagating past the shield everywhere else. A substrate support is positioned in the second chamber adjacent to the shield. The pressure in the second chamber is lower than a pressure in the first chamber. A dual-scanning system scans the substrate support relative to the aperture with a first and a second motion, thereby improving uniformity of the deposited thin fill.

Abstract: A multi-channel wavelength monitor is described that includes a dispersive element that is positioned in an optical path of an incident optical beam having a plurality of wavelengths. The dispersive element disperses the optical beam into a plurality of optical beams that simultaneously propagate in a plurality of optical paths, where each of the plurality of optical beams has one of the plurality of wavelengths. An optical filter is positioned to intercept each of the plurality of optical paths at a plurality of locations. The optical filter substantially passes a respective one of the plurality of optical beams at a respective one of the plurality of locations and substantially blocks the other optical beams. A plurality of optical detectors is positioned adjacent to the optical filter in a direction of propagation of the plurality of optical beams. A respective one of the plurality of optical detectors is positioned in a respective one of the plurality of optical paths.

Abstract: A method for generating an application specific integrated circuit including providing a software configurable semiconductor integrated circuit having a fixed hardware architecture that includes a plurality of task engines. A high-level language compiler is provided that compiles a user created high-level language program that defines the application specific integrated circuit. The compiler parses the program into a plurality of microtasks for instructing the plurality of task engines to implement the application specific integrated circuit.

Abstract: An electro-optic device including an optical waveguide formed in an electro-optic material that propagates an optical signal along a first direction of propagation is described. The device also includes an electrical waveguide formed in the electro-optic material and positioned co-linear relative to the optical waveguide and in electromagnetic communication with the optical waveguide, where the electrical waveguide also propagates the electrical signal in the first direction of propagation. A compensation network is electrically coupled to the electrical waveguide at a junction and propagates the electrical signal in a second direction of propagation that is substantially non-co-linear with the first direction of propagation.

Abstract: An apparatus and method for cleaving optical waveguides to precise differential length are described. A first end of a waveguide is coupled to an input port of a reflectometer. A reference mirror is then positioned in a path of radiation propagating through the second end of the waveguide. A waveguide cutting tool is then positioned proximate to the waveguide and at a distance relative to a reference mirror. A first reflectometry measurement is performed on the waveguide to a second end of the waveguide. A second reflectometry measurement is performed on the waveguide to the reference mirror. The waveguide is then positioned relative to the reference mirror and waveguide cutting tool so that the first reflectometery measurement is a measurement increment apart from the second reflectometry measurement. The waveguide is then cut with the cutting tool positioned at the distance relative to the reference mirror.

Abstract: A co-planar waveguide interferometric electro-optic modulator that reduces the bias point sensitivity of the modulator to ambient temperature and to applied RF is described. The modulator includes a first and second waveguide that are formed in an electro-optic substrate. A RF electrode is positioned on the electro-optic substrate between the first and the second waveguide. A ground electrode that may include a slot is positioned proximate to the second waveguide. A guard ground electrode is positioned proximate to the first waveguide to sink heat from the RF electrode and may also balance the thermal stress in the two waveguides. A dielectric material may also be positioned proximate to the first waveguide to balance the thermal stress in the two waveguides.