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| Number | Title | Issue Date |
| 8184363 | All-fiber integrated high power coherent beam combination A fiber laser amplifier system including a master oscillator that generates a signal beam. A splitter splits the signal beam into a plurality of fiber beams where a separate fiber beam is sent to a fiber amplifier for amplifying the fiber beam. A tapered fiber bundl... | 05/22/2012 |
| 8184362 | Phase control and locking method for coherently combining high-gain multi-stage fiber amplifiers Presented is a method and system for phase locking a multi-stage parallel fiber amplifier. The method comprises receiving a signal beam from a first stage, in one path of the multi-stage fiber amplifier, onto a fiber that is pumped to produce a saturated signal beam... | 05/22/2012 |
| 8179594 | Method and apparatus for spectral-beam combining of fanned-in laser beams with chromatic-dispersion compensation using a plurality of diffractive gratings Apparatus and method for spectral-beam combining of light from a plurality of high-power lasers (e.g., fiber MOPA lasers) that, in some embodiments, use substantially identical diffraction gratings in a 1-D non-parallel, mutually compensating configuration to combin... | 05/15/2012 |
| 8077385 | Reconfigurable optical amplifier, reversible optical circulator, and optical signal transmission system A reconfigurable optical amplifier including a first reversible optical circulator and an optical gain device is provided. The first reversible optical circulator has four I/O ports which are respectively referred to as a first terminal, a second terminal, a third t... | 12/13/2011 |
| 7916388 | Drive laser for EUV light source A device is described herein which may comprise an oscillator having an oscillator cavity length, Lo, and defining an oscillator path; and a multi-pass optical amplifier coupled with the oscillator to establish a combined optical cavity including the osci... | 03/29/2011 |
| 7884997 | System and method for coherent beam combination Systems and methods for coherent beam combination of lasers are provided. In one embodiment, a method for coherent beam combination is provided. The method comprises providing a plurality of secondary laser signals from a primary laser signal, amplifying the plurali... | 02/08/2011 |
| 7796326 | Apparent incoherence method A method and system whereby a narrow linewidth coherent laser source when transmitted as a plurality of output signals and subsequently detected at a distance appears to produce the uniform illumination characteristics of an incoherent source thereby suppressing las... | 09/14/2010 |
| 7710639 | System and method for uniform illumination of a target area A system and method is provided for uniform illumination of a target area. In one embodiment, the system comprises a plurality of mutually incoherent light sources configured to generate respective light beams with different wavelengths, and transmitting optics conf... | 05/04/2010 |
| 7630127 | Bidirectional optical amplifier A bidirectional amplification system and method are disclosed. A single optical line amplifier and isolation loss filters are used to amplify signals in both the east and west directions with sufficient gain along a fiber. In an embodiment, a first signal propagatin... | 12/08/2009 |
| 7589890 | Conductively cooled liquid thermal nonlinearity cell for phase conjugation and method A thermal nonlinear cell and method. The cell includes a substantially planar nonlinear medium and a mechanism for removing thermal energy from the medium in a direction substantially orthogonal to said medium. In one embodiment, the mechanism for removing thermal e... | 09/15/2009 |
| 7446934 | Raman, pump power control for gain flattening The present invention aims at providing a method for controlling wavelength characteristics of optical transmission powers by Raman amplification, in which the wavelength characteristics of optical transmission powers are automatically compensated without giving any... | 11/04/2008 |
| 7446933 | Multi-band hybrid SOA-Raman amplifier for CWDM A multi-band hybrid amplifier is disclosed for use in optical fiber systems. The amplifier uses Raman laser pumps and semiconductor optical amplifiers in series to produce a relatively level gain across the frequency range of interest. Multiple Raman pumps are multi... | 11/04/2008 |
| 7436588 | Method and system for hybrid coherent and incoherent diffractive beam combining A hybrid beam combining system or method combines a plurality of coherent and incoherent light beams into a composite high power diffraction limited beam. N oscillators each transmit light at one of N different wavelengths and each wavelength is split into M constit... | 10/14/2008 |
| 7436587 | Variable focal length constant magnification lens assembly Aspects of the invention can provide an imaging device that can include a first optical element having a first focal length, and a second optical element having a variable second focal length. The second optical element can be located at a fixed first distance of ap... | 10/14/2008 |
| 7433117 | Polarization-diverse optical amplification A polarization-diverse optical amplifier includes a polarization-sensitive optically active medium and a polarization splitter. The polarization splitter is configured to receive input light, to direct a first polarization component of the received input light to a ... | 10/07/2008 |
| 7429111 | Two-panel color management system The invention provides a two-panel color management system for projection display applications, wherein color sequencing is accomplished using achromatic beam switching and static color separation. In a preferred embodiment, a liquid-crystal polarization switch alte... | 09/30/2008 |
| 7421185 | Optical receiving device, free space optics transmission apparatus, receiving apparatus An optical receiving device includes an optical receiving element and a light collecting portion having an output surface close to or in contact with the optical receiving surface of the optical receiving element. The dispersion plane at an arbitrary point on the li... | 09/02/2008 |
| 7375878 | Optical repeater On the upstream side of a quantum dot optical amplifier, a polarization beam splitter with one input and two outputs is provided. Two optical fibers connected to output sections of the polarization beam splitter are connected to input sections of the quantum dot opt... | 05/20/2008 |
| 7362499 | Optical amplifier with pump light source control for Raman amplification A Raman amplifier for amplifying a wavelength division multiplexed (WDM) light including signal lights wavelength division multiplexed together. The amplifier includes an optical amplifying medium and a controller. The optical amplifying medium uses Raman amplificat... | 04/22/2008 |
| 7362925 | Control method and control apparatus of optical device The present invention aims at providing a control method and a control apparatus for controlling the operation setting of an optical device with high accuracy, so as to reliably obtain characteristics according to a desired relationship to be set corresponding to a ... | 04/22/2008 |
| 7355785 | Gain-clamped semiconductor optical amplifier A gain-clamped semiconductor optical amplifier is disclosed. The amplifier includes a gain waveguide for amplifying an optical signal input to the gain waveguide, and a grating layer, in contact with the gain waveguide, having a first grating disposed at a first end... | 04/08/2008 |
| 7342714 | Multi-band hybrid SOA-raman amplifier for CWDM A multi-band hybrid amplifier is disclosed for use in optical fiber systems. The amplifier uses Raman laser pumps and semiconductor optical amplifiers in series to produce a relatively level gain across the frequency range of interest. Multiple Raman pumps are multi... | 03/11/2008 |
| 7339727 | Method and system for diffractive beam combining using DOE combiner with passive phase control A system and method for combining plural low power light beams into a coherent high power light beam. Optical amplifiers transmit a plurality of light beams propagating at a common wavelength through an array of optical fiber emitters. Each constituent beam is emitt... | 03/04/2008 |
| 7336414 | Optical modulating device An optical modulation apparatus is provided which implements a stable amplifying function by reducing the effect of reflected light rays form end faces of a bidirectional optical amplifier by imposing a numerical limitation on the relationship between the gain of th... | 02/26/2008 |
| 7330665 | Optical frequency modulated transmitter An optical frequency modulated transmitter includes a plurality of separately phased-controlled slave lasers, the outputs of which are combined to form a single output beam of the transmitter. A master optical oscillator outputs an optical signal for injection locki... | 02/12/2008 |
| 7330302 | Optical transmission system This invention provides an optical transmission system which allows to perform high-quality transmission of each of a plurality of signal channels multiplexed. In the optical transmission system, signal light in which a plurality of signal channels with an optical f... | 02/12/2008 |
| 7324268 | Optical signal amplifier and method An optical amplification apparatus is provided comprising a plurality of fiber amplification media segments which are concatenated in series wherein subsequent to each fiber amplification media segment one or more wavelengths is dropped so as to exploit a gain versu... | 01/29/2008 |
| 7319707 | L-band light source An L-band light source is provided that has improved amplifying efficiency and stabilized output power. The L-band light source comprises: a gain medium having first and second sides, and configured to generate an L-band amplified spontaneous emission (ASE); a first... | 01/15/2008 |
| 7317873 | Optical packet switching system An optical packet switching system in which transmission quality, reliability, and system management in optical packet switching control are improved. An optical packet switch section includes semiconductor optical amplifiers as gate switches multistage-connected on... | 01/08/2008 |
| 7289734 | Method and system for multi-level power management in an optical network A method and system for multi-level power management in an optical network is provided. They include three levels of power equalization. The first level of power management equalizes the powers of channels in a band of channels. The second level of power management ... | 10/30/2007 |
| 7286582 | Optical external cavities having brewster angle wedges This invention consists of an optical external cavity having specialized Brewster angle wedges. The external cavity apparatus utilizes several types of very high index of refraction wedges made from semiconductor and special glass materials. The apparatus limits the... | 10/23/2007 |
| 7286576 | Pulse laser arrangement and method for setting pulse length for laser pulses The object of a pulsed laser arrangement and a method for adjusting the pulse length of laser pulses is to change the pulse length over a wide range substantially independent from the laser output power, in particular to counteract a reduction in output and to preve... | 10/23/2007 |
| 7286209 | Generation of wideband high power coherent optical radar signals An arrangement for generating a high power optical radar beam. The arrangement includes first and second laser sources each having a first laser for generating an optical beam of a relatively low frequency F1 and a second laser for generating an optical beam ... | 10/23/2007 |
| 7286283 | Optical fiber coupling arrangement Apparatus for optically pumping a clad amplifier fiber includes one or more transmission fibers arranged and configured to insert pump-light from a pump light source such as a diode-laser into the cladding of the amplifier fiber. The pump light propagates through th... | 10/23/2007 |
| 7262905 | Optical amplifier An optical amplifier includes a first optical path, second optical path, semiconductor optical amplifier, and multi-mode interference 3-dB coupler. The first optical path guides oscillation light. The second optical path guides signal light. The semiconductor optica... | 08/28/2007 |
| 7257327 | Wireless communication system with high efficiency/high power optical source An optical communication system is provided which includes an optical signal transmitter which communicates high bandwidth, high power frequencies. The optical signal transmitter includes a high efficiency/high power optical source such as an optical magnetron or a ... | 08/14/2007 |
| 7253943 | Phase optimization apparatus and method for obtaining maximum extinction ratio in mach-zehnder interferometer wavelength converter using cross phase modulation of semiconductor optical amplifier A phase optimization apparatus and method to obtain a maximum extinction ratio by feeding back a portion of an optical signal output from a Mach-Zehnder interferometer wavelength converter using XPM of a semiconductor optical amplifier to maintain an optimum phase d... | 08/07/2007 |
| 7254374 | Switchable multi-transmitter combiner and method A transmitter-combining broadcast system and method is provided that allows IBOC-compatible broadcast with simple analog-to-IBOC upgradeability with high efficiency. At full power, a standard analog signal and an IBOC-compatible digital signal are transmitted by com... | 08/07/2007 |
| 7248804 | Optical transmission device using a wide input dynamic range optical amplifier Conventionally, an adjustment of an optical power level of an input Pin of an optical amplifier module is made with an optical variable attenuator. An optical coupler for measuring the optical power level of Pin and an optical variable attenuator are replaced by a v... | 07/24/2007 |
| 7239268 | Method and apparatus for minimizing the number of power amplifiers required under multiple transmission conditions The number of power amplifiers required to amplify a plurality of transmission signals is reduced by using non-linear transmission lines (NTL) circuits. In general, a “combining” NTL circuit is used to combine the plurality of transmission signals to form a soli... | 07/03/2007 |
