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| Number | Title | Issue Date |
| 8078410 | Sensing using polarization diversity and wavelength dependent backscatter Provided herein are systems and methods capable of detecting and discriminating and/or classifying hazardous biological agents or other hazardous agents. In one aspect, a system measures electromagnetic energy scattered by a material at the different polarizations s... | 12/13/2011 |
| 7986397 | FMCW 3-D LADAR imaging systems and methods with reduced Doppler sensitivity A method for frequency modulated continuous wave LADAR imaging is provided. The method comprises the steps of generating a chirped laser signal and a constant-frequency laser signal, forming a target laser signal from the chirped laser signal and the constant-freque... | 07/26/2011 |
| 7817688 | Phase and polarization controlled beam combining devices and methods A controller, such as a programmable logic controller, may manipulate a phase and/or polarization module to alter and/or control the phase and polarization of input beams. Utilizing active phase and polarization control can enable the combination of any arbitrary nu... | 10/19/2010 |
| 7583711 | Apparatus and method for stabilizing the frequency of lasers Method and apparatus are disclosed that enable lasers to be stabilized in absolute frequency to high precision. The principle of operation is to: 1) lock the laser frequency to an etalon transmission resonance, 2) phase modulate the laser beam at a frequency corresp... | 09/01/2009 |
| 7551656 | Low stress optics mount using thermally conductive liquid metal or gel An optical assembly with mounting provided to effectively transfer heat away from an optic, such as a slab or waveguide amplifier or laser disk, while limiting internal stresses. The assembly includes an optic with a planar surface. A heat sink is positioned in the ... | 06/23/2009 |
| 7532311 | Efficient lidar with flexible target interrogation pattern A system for observing a field of view including a light transmitter and a light detector. A path is defined between the transmitter and the detector. The light transmitter generates substantially coherent light onto a transmit portion of a light path and the light ... | 05/12/2009 |
| 7406220 | Beam steering and combination Systems and methods for steering at least one of two or more optical input beams and forming a combined optical output beam are disclosed. A system has a waveguide, one or more phase controlling devices and one or more beam steering devices. The waveguide is configu... | 07/29/2008 |
| 7339670 | Wavelength normalized depolarization ratio lidar A remote sensing optical system and method is disclosed that permits detection and discrimination of aerosols. The system outputs a plurality of wavelengths and is equipped with a polarization sensitive receiver capable of measuring the scattered energy in two ortho... | 03/04/2008 |
| 7327471 | Apparatus and method for stabilizing lasers using dual etalons Method and apparatus are disclosed that enable lasers to be stabilized in frequency to a high precision while simultaneously enabling rapid re-acquisition of stabilization control loops in the event of frequency locking loss. The principle of operation is to incorpo... | 02/05/2008 |
| 7319708 | Variable pulse repetition frequency passively Q-switched laser A passive Q-switch element is disclosed that permits operating a laser with a variable pulse repetition frequency (PRF). The Q-switch comprises two wedges of material, one made from saturable absorber material, the other from transparent material, with the two wedge... | 01/15/2008 |
| 7313299 | Laser beam transformation and combination using tapered waveguides A system for transmitting the spatial profile of laser beams with particular applicability to coherently combine laser beams into one beam. The system includes a tapered waveguide with an inlet and outlet at ends of two waveguide elements each having a reflective su... | 12/25/2007 |
| 7239777 | Method and apparatus to coherently combine high-power beams in self-imaging waveguides An apparatus for combining laser beams into a single high power output beam. The apparatus includes a self-imaging waveguide (SIWG) with parallel reflective elements that have a length that is an integer multiple of the self-imaging or Talbot length of the waveguide... | 07/03/2007 |
| 7193771 | Power scalable optical systems for generating, transporting, and delivering high power, high quality laser beams Power scalable, rectangular, multi-mode, self-imaging, waveguide technologies are used with various combination of large aperture configurations, 20, 50, 80, 322, 324, 326, 328, 330, 332, 334, 336, 338, Gaussian 360 and super-Gaussian 350 beam p... | 03/20/2007 |
| 7193720 | Optical vibration imager A remote sensor capable of imaging vibrations at many simultaneous points using high-speed imaging cameras is disclosed. The preferred embodiment operates in heterodyne detection mode using a single camera to capture signals to recover multi-pixel vibrations. One al... | 03/20/2007 |
