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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...
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7576907 |
Phase and amplitude light pulse shaping using a one-dimensional phase mask
Simultaneous amplitude and phase control of ultrafast laser pulses using a single, linear (one-dimensional) liquid crystal spatial light modulator is described. Amplitude shaping is accomplished by...
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7397018 |
Amplitude and phase controlled adaptive optics system
An adaptive optics system is provided. The system includes a light source, a pair of deformable mirrors and a detection module. The light source is configured to provide an outgoing beam. The...
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7391558 |
Laser amplifier power extraction enhancement system and method
A high extraction efficiency laser system. The novel laser system includes a master oscillator for providing a laser beam, an amplifier adapted to amplify the laser beam, and an aberrator for...
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7349609 |
Terahertz radiation generation and methods therefor
Terahertz radiation generation systems and methods are implemented using a variety of methods and devices. According to an example embodiment of the present invention, method for generating...
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7253945 |
Amplitude dividing type laser amplification apparatus
An optical amplification apparatus includes a polarizing beam splitter for reflecting a portion of an incident light and transmitting a remaining portion of the incident light, depending upon a...
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7193772 |
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...
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6995897 |
Deformable mirror and information device having the deformable mirror
A deformable mirror according to the invention comprises a substrate, a reflector which is supported by said substrate and the shape of whose reflecting areas is variable, and a plurality of drive...
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6906839 |
System and method for recovering phase information of a wave front
A system and method for recovery of phase information from recorded intensity values is disclosed. In one aspect, a phase filter is placed in a plane, which may be the back focal plane (BFP) of a...
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6385228 |
Coherent beam combiner for a high power laser
A phase conjugate laser mirror employing Brillouin-enhanced four wave mixing allows multiple independent laser apertures to be phase locked producing an array of diffraction-limited beams with no...
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6049402 |
Multiplexed phase-conjugate holographic data storage using a buffer hologram
An optical storage system, which includes a temporary buffer and an optical storage medium, allows the practical combination of phase-conjugation and hologram multiplexing. The temporary buffer...
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6020990 |
R.F. signal summing using non-linear optical phase conjugation
A system for summing RF modulated optical signals. In order to compensate for performance degradation at the summing junction, the system utilizes four-wave mixing elements to provide the phase...
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5886800 |
Large optics compensated imaging systems
A technique for correcting wavefront aberrations introduced by large primary optical elements in portions of the electromagnetic spectrum. The aberrations of the primary element are first...
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5880873 |
All solid-state SBS phase conjugate mirror
A stimulated Brillouin scattering (SBS) phase conjugate laser mirror uses a solid-state nonlinear gain medium instead of the conventional liquid or high pressure gas medium. The concept has been...
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5798853 |
Optical communication system compensating for chromatic dispersion and phase conjugate light generator for use therewith
An optical communication system compensating for chromatic dispersion and a phase conjugate light generator for use therewith. The system includes an optical transmitter which receives an input...
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5729380 |
Loop phase-conjugate mirror for depolarized beams
A loop four-wave mixing phase conjugator that can be used with depolarized signal beams comprises a polarization separator, a polarization mixer, an optical diode, a gain medium and relay optics...
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5726795 |
Compact phase-conjugate mirror utilizing four-wave mixing in a loop configuration
A compact loop four-wave mixing phase conjugator that can be used in practical optical applications comprises a reflective nonlinear cell, relay optics, an optical gain medium, and an optical diode...
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5726282 |
Light emitting diode
A class of rigid rod and latter polymers having light emitting capability is provided. Included in this class of polymers are those having novel repeating structural units. These rigid rod and...
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5557431 |
Real-time compensated imaging system and method using a double-pumped phase-conjugate mirror
An adaptive optics imaging system uses a double pumped phase conjugate mirror (DPCM) to compensate for phase, amplitude or polarization aberrations imposed upon a multi-pixel object beam. A remote...
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5535041 |
Device for stabilizing the reflectivity of mirrors having phase conjugation through stimulated brillouin scattering at high pulse repetition rate
A phase conjugation mirror including a non-linear medium (1) and a focusing lens (2), in which a beam to be reflected (F1) is displaced relative to a non-linear medium. The displacement is obtained...
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5535024 |
Photorefractive holographic interference novelty filter
A novelty filter utilizes self-nulling and self-aligning of reflection and transmission phase conjugate beams. A photorefractive crystal is arranged so that the contributions to the phase conjugate...
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5402261 |
Phase conjugation device
The phase conjugation device includes at least one non-linear medium and an optical focussing system producing at least two focal points within the non-linear medium and capable of focussing light...
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5396368 |
Flexible rejection filter (U)
A flexible rejection filter removes coherent radiation from an incoming beam of light. The filter includes a beamsplitter for dividing the transmitted portion into first and second beams. A...
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5379147 |
Dye laser amplifiers
A dye laser amplifier is formed by a stimulated brillouin scattering (SBS) dye cell which receives both dye laser light to be amplified and a pump beam along a common optical path. Phase...
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5339371 |
Optical interconnection networks and processes
Disclosed are an optical interconnection network and process, having a phase-conjugate mirror and input and output side channels. In the network, time-reversed wave, of a light beam propagated...
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5337170 |
Quadratic optical processor for reducing multiplicative noise and other uses
A degenerate four-wave mixing arrangement employs a photorefractive crystal as a real time holographic recording medium to record a hologram of the noisy optical signal. The signal passes through...
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5303032 |
Method of measuring the time for forming refractive index grating of a photo-nonlinear medium
A laser beam with a wavelength λ emitted from a laser beam source is split into first and second pump beams and a probe beam. The first and second pump beams are incident on light incident...
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5287213 |
Barium strontium titanate photorefractive device and method for making the same
The invention relates to a photorefractive device made of single crystal of which the chemical composition substantially is Ba 1 -x Sr x TiO 3 (0.01<x<0.1 BST) The method for manufacturing...
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5255283 |
Process for making a custom phase-conjugated circular mirror to be used in a laser resonator that will suit specifications of a user and a custom phase-conjugated circular mirror made according to the process
A process for making a custom phase-conjugated circular mirror to be used in a laser resonator that will suit specifications of a user is provided. The mirror reverses wavefront of one particular...
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5170268 |
Polarization-independent energy exchange and phase conjugation
A polarization independent energy exchanger transfers optical energy from a first coherent beam of optical energy to a second coherent beam of optical energy where the second beam is coherent with...
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5130849 |
Method and apparatus for energy transfers between optical beams using near-bandgap electrorefractive effect
Enhanced energy transfers are achieved between optical beams by operating at wavelengths in the near-bandgap region of a photorefractive material, and employing an electrorefractive effect...
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5113282 |
Dual light valve system with selective decoupling of light valves
Apparatus for selectively limiting the response of an auxiliary liquid crystal light valve which is used in a dual liquid crystal light valve laser optics system for correcting inherent liquid...
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5038359 |
Self-pumped, optical phase conjugation method and apparatus using pseudo-conjugator to produce retroreflected seed beam
An optical input beam is transmitted through a non-linear medium capable of two-wave mixing gain by photorefractive, Brillouin, Raman, or other non-linear optical mechanism. A psuedo-conjugator...
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5023477 |
Transient energy self-pumped conjugator and method
Self-pumped phase conjugation is achieved for optical beams with very short pulse durations by a transient energy transfer mechanism. A probe beam is transmitted through a non-linear optical...
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4991177 |
Laser beam clean-up using mutually pumped phase conjugation
A mutually pumped phase conjugator (MPPC) is used to remove spatial distortions from a high power laser beam. The high power beam with its "dirty" spatial profile is directed into one side of the...
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4966443 |
Light beam scanner
A light beam scanner for scanning a light beam not by using an optical part such as a rotary polygon mirror or a galvanometer but by using a phase-conjugate element (or phase-conjugate mirror)...
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4958908 |
Bandwidth-preserving brillouin phase conjugate mirror and method
A coherent input beam from a laser is fed into a Brillouin-enhanced four wave mixer which generates a phase conjugated seed beam in counterpropagation with the input beam. A brillouin amplifier is...
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4949056 |
Unconventional adaptive optics
An improved adaptive optics system is disclosed for correcting atmospheric phase aberrations. A satellite (10) laser beacon is operated at the Stokes shifted Raman wavelength. After passing through...
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4936660 |
Optical phase conjugation using stimulated brillouin scattering with multiple foci
A device and corresponding method for optical phase conjugation using a stimulated Brillouin scattering (SBS) medium and resulting in a reduction in the (SBS) threshold level. An incident light...
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4913534 |
Real-time dynamic holographic image storage device
A real-time dynamic holographic image storage device uses four-wave mixing in a pair of photorefractive crystals. An oscillation is produced between the crystals which can be maintained...
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4880295 |
Optical device enhancement method and apparatus by control of stimulated brillouin scattering gain
The output of an optical device which involves a stimulated brillouin scattering (SBS) gain medium is enhanced over a range of input beam intensities by providing a gain medium which has a given...
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4869578 |
Gasdynamic phase-conjugated mirror
A gasdynamic gas flow forms a lightguide wherein an incident coherent light wavefront, such as a laser beam, is reflected to produce a backward-travelling phase conjugated light wavefront. The...
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4831333 |
Laser beam steering apparatus
A device for steering a wavefront of electromagnetic radiation comprising a pumping means for coherently pumping a plurality of phase conjugate mirrors with a monochromatic coherent beam having a...
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4778261 |
Method and apparatus for non-frequency-shifted, phase conjugation of optical waves by brillouin-enhanced four-wave mixing
Method and apparatus for optical phase conjugation, which apparatus is also known as a phase conjugate mirror, utilizes Brillouin enhanced four wave mixing in which a forward going pump wave and a...
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4773739 |
Self-pumped phase conjugate mirror and method using AC-field enhanced photorefractive effect
A self-pumped phase conjugate mirror and method is disclosed in which an optical beam is applied to a crystal formed from a photorefractive material, the beam is deflected back into the crystal as...
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4767195 |
System and method for encoding information onto an optical beam
A system and method for encoding information onto an optical beam is described in which a photorefractive material is used to modulate the beam. An alternating electric field is applied to the...
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4750818 |
Phase conjugation method
The use of large sensor and phase shifter arrays in phase conjugation adaptive systems is currently limited by the computational power conventionally employed to solve small arrays. Noting that in...
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4720176 |
Erase beam apparatus and method for spatial intensity threshold detection
A phase conjugate resonator (PCR) (2) employing a phase conjugate mirror (PCM) (4) provides high resolution spatial detection of individual locations in a two-dimensional optical array which exceed...
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4715689 |
Apparatus and method for spatial intensity threshold detection
A phase conjugate resonator (PCR) employing at least one phase conjugate mirror (PCM) provides high resolution spatial detection of individual locations in a two-dimensional optical array which...
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4635299 |
Discrete phase conjugate technique for precompensation of laser beams transmitted through turbulence
A process and apparatus are disclosed for aligning a laser beam from a laser transmitter with an incoming laser beam, and driving any sensed tilt differences on an aperture and subaperture basis to...
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