50 results about "Phase conjugate mirror" patented technology

A beam control system and method which utilizes the wavefront reversal property of nonlinear optical phase conjugation to permit incorporation of a liquid crystal OPA within the low power legs of the beam control system, thereby affording the advantages of the OPA without the power limitations thereof. The invention is adapted for use with a beacon for illuminating a target with a first beam of electromagnetic energy. The system includes a telescope (1010) for receiving a target return comprising a reflection of the first beam from the target. An optical phased array (1050) is included for correcting for aberrations in the wavefront of the target return. A mechanism is included for ascertaining the correction applied by the optical phased array to the target return. The mechanism applies the correction to a third beam which ultimately is the output beam. In the illustrative embodiment, the first beam of electromagnetic energy is optical energy and the mechanism includes a first phase conjugate mirror (1091) adapted to conjugate electromagnetic energy output by the third mechanism and a second phase conjugate mirror (1092) adapted to conjugate the output of the first phase conjugate mirror. The fourth mechanism further includes an amplifier (1088) for boosting the signal output by the second phase conjugate mirror (1092) to provide the output beam.

A system and method for focusing electromagnetic energy on a moving target. Generally, the inventive system sends a pilot beam to a target and analyzes a return wavefront to ascertain data with respect to any distortions and other phase and/or amplitude information in the wavefront. This information is then used to pre-distort an output beam by so that it is focused on the target by the intervening distortions. In an illustrative embodiment, the pilot beam is provided by a beacon laser mounted off-axis with respect to the output beam. The reflected wavefront is received through a gimbaled telescope. Energy received by the telescope is detected and processed to ascertain wavefront aberrations therein. This data is used to predistort a deformable mirror to create an output beam which is the phase conjugate of the received wavefront. In a first alternative embodiment, a nonlinear optical phase-conjugate mirror is employed to generate the required wavefront-reversed replica of the received wavefront. The system further includes an arrangement for modulating the output beam to confuse the target. In a second alternative embodiment, the system is adapted to examine atmospheric distortions of starlight to predistort the output beam. The alternative embodiment offers a faster response time and a lower susceptibility to detection.

A system for directing electromagnetic energy. The inventive system includes a first subsystem mounted on a first platform for transmitting a beam of the electromagnetic energy through a medium and a second subsystem mounted on a second platform for redirecting the beam. In accordance with the invention, the second platform is mobile relative to the first platform. In the illustrative embodiment, the beam is a high-energy laser beam. The first subsystem includes a phase conjugate mirror in optical alignment with a laser amplifier. The first subsystem further includes a beam director in optical alignment with the amplifier and a platform track sensor coupled thereto. In the illustrative embodiment, the second subsystem includes a co-aligned master oscillator, outcoupler, and target track sensor which are fixedly mounted to a stabilized platform, a beam director, and a platform track sensor. In the best mode, the stable platform is mounted for independent articulation relative to the beam director. A first alternative embodiment of the second subsystem includes first and second beam directors. The first beam director is adapted to receive the transmitted beam and the second beam director is adapted to redirect the received beam. In accordance with a second alternative embodiment, an optical fiber is provided for coupling the beam between the first platform and the second platform.

A beam control system and method. In an illustrative embodiment, the inventive system (500) provides a first beam of electromagnetic energy (503); samples the first beam (503) and provides a second beam (505) in response thereto; detects aberrations in the second beam (505); and corrects aberrations in the first beam (503) in response to the detected aberrations. In a specific implementation, the invention (500) includes a beam director telescope (510) having a primary mirror (516) on which a holographic optical element (518) is disposed. The holographic optical element (518) samples the output high-power beam and provides a sampled beam to a wavefront sensor (520). The wavefront sensor (520) provides signals to an adaptive optics processor (580). The adaptive optics processor (580) analyzes the sampled wavefront, detects aberrations therein and provides a correction signal to an optical phased array (550). A master oscillator (552) provides a reference beam, which reads the optical phased array (550) and is back reflected off a front surface of an aperture sharing element (540). The resulting beamfront is conjugated by a first phase conjugate mirror (546) and then again by a second phase conjugate mirror (556). The output of the second phase conjugate mirror (556) is amplified and reflected off the front surface of the aperture sharing element (540). The aperture sharing element (540) outputs the high power beam via the telescope (510) which is corrected for the optical distortions in the telescope and beam path.

Method for jamming or affecting the quality of photo and video recording, the method comprising illuminating the area, collecting light reflected or scattered from optical components such as camera lenses, amplifying them, and reversing the amplified beams back to the camera with phase conjugating mirror. The method may further comprise image acquisition and processing for identifying unwanted optical components and sensors, and electronically pointing and focusing a laser beam on said components and sensors.

The invention provides a system for improving the laser collimation precision by utilizing an optical phase conjugation principle, comprising a laser device, wherein a polarizer, a beam expanding and collimation system, a first beam splitter, a first polarization spectroscope and a reflector are sequentially arranged along an emitting light beam of the laser device; a position detector is arranged in a beam splitting direction of the first beam splitter; reflection light of the reflector is parallel to the emitting light beam of the laser device; a second polarization spectroscope, a Faraday rotator, a second beam splitter and a space optical phase modulating device are sequentially arranged on the reflection light of the reflector; a wave-front detector is arranged in the beam splitting direction of the second beam splitter; and the space optical phase modulating device and the wave-front detector are connected to a computer. The invention further provides a method for improving the laser collimation precision by utilizing the system; the system disclosed by the invention has a simple structure and influences of uneven atmosphere on the laser collimation can be effectively compensated; and the space optical phase modulating device is used as a phase conjugation mirror so that the system has the advantages of small size, easiness for controlling and the like.

A high-energy laser system intercepting a target using a phase conjugate mirror includes a laser oscillator which generates a laser beam irradiated to the target, a light amplifier which receives the laser beam irradiated to and reflected by the target so as to amplify it, a phase conjugate mirror which reflects the amplified laser beam. And the laser beam that is reflected by the phase conjugate mirror is amplified again in the light amplifier, and then irradiated to the target so as to intercept the target.

A method that provides for a phase conjugate mirror 10 having a gallium-arsenide substrate 11 with a generally cubic crystalline lattice and a number of gallium-arsenide crystal projections 14 extending from said substrate 11, the projections each having three generally planar surfaces 15, 16, 17, where the surfaces each being generally obliquely oriented with respect to a plane of said substrate 11, the plane substantially corresponding to a (111) crystal face, the projections 14 being oriented along the plane 13 to provide a predetermined corner-cube array pattern 10, the device including a number of implant sites 25 spaced apart from one another along the substrate 11 to define a pattern 40, and forming a number of corner-cubes articles having a shape substantially corresponding to the corner-cube array 10 pattern 40, wherein the articles each have a number of cube-corner projections 14 spaced apart from each other by a minimum distance of 1 micron. Further, providing for a method of slowing annealing that re-crystallizes the implant sites 25, which located between and slightly underneath the corner-cube projections, where the implant sites 25 are embedded within the substrate material.

The invention discloses a stimulated Brillouin scattering phase conjugate mirror with a rotating wedge-shaped plate and relates to a phase conjugate mirror, solving the problem of serious heat absorption of media in the traditional stimulated Brillouin scattering process at present. The stimulated Brillouin scattering phase conjugate mirror with a rotating wedge-shaped plate comprises an SBS (Stimulated Brillouin Scattering) medium pool, a focusing lens and an SBS medium, wherein the SBS medium is loaded in the SBS medium pool; and the SBS medium pool is arranged on an image space light path of the focusing lens. The stimulated Brillouin scattering phase conjugate mirror also comprises a wedge-shaped plate, a rotating motor and a connecting shaft, wherein the wedge-shaped plate is arranged on an object space light path of the focusing lens; the center of the wedge-shaped plate is provided with a round hole; and one end of the connecting shaft is fixedly connected with a rotating shaft of the rotating motor, while the other end of the connecting shaft passes through the round hole in the center of the wedge-shaped plate and is fixedly connected with the wedge-shaped plate. The stimulated Brillouin scattering phase conjugate mirror overcomes the defects of the prior art and can be applied to the technical field of stimulated Brillouin scattering.

The invention relates to an associated chromatographic method and device. The method comprises the following steps: (1) fixing a sample; (2) emitting a beam of laser by a laser to irradiate the sample and transmitting ultrasound by an ultrasonic transmitter to act on the sample; (3) emitting a beam of object light from a thermal light source or a pseudo-thermal light source, reflecting the light by a phase conjugate mirror to irradiate the sample, spreading the light in the sample, then emitting the light and detecting the emitted light by a light intensity detector to obtain a first group of signal light; (4) emitting another beam of reference light from the thermal light source or the pseudo-thermal source, and detecting by a detector with spatial resolution capability to obtain a second group of signal light, or calculating to obtain the second group of signal light according to the known statistical distribution of the pseudo-thermal source; and (5) performing association operation on the two groups of signals to give out an associated chromatographic image. By adopting the method and the device provided by the invention, an associated image at an ultrasound focus can be obtained. Associated chromatography can obtain an optical image with optical resolution in biological soft tissue in a dynamic and lossless manner.

The object of this invention is to provide a phase stabilization device for stimulated brillouin scattering-phase conjugate mirrors and a light amplification apparatus using the phase stabilization device. A light amplification apparatus of the present invention includes a polarizer (70) for polarizing light beams reflected from a plurality of stimulated brillouin scattering-phase conjugate mirrors and causing the light beams to interfere with each other. A detector (80) acquires an interfering beam resulting from interference of the polarizer (70), and outputs the interfering beam. A phase controller (90) controls phase using the interfering beam acquired by the detector. Therefore, the apparatus of the present invention can stably lock the phase for a long period of time, and can be used in various industries and for scientific research in cases where a high repetition rate and high power are required.

A self-adjusting interferometric outcoupler. In the most general sense, the invention is an optical system (100) comprising a first mechanism (112) for generating a first beam, a second mechanism (122) for receiving the first beam and returning a second beam, and an interferometer (116) positioned to couple the first beam to the second mechanism (122) and to receive and output the second beam, wherein the interferometer (116) is also shared by the first mechanism (112) and/or the second mechanism (122) to control the frequency of the first beam and/or the second beam, respectively. In the illustrative embodiment, the first mechanism (112) is a master oscillator, the second mechanism (122) is a phase conjugate mirror, and the system (100) further includes a power amplifier (118) positioned to amplify the first beam during a first pass and to amplify the second beam during a second pass.

The invention discloses a strong-laser high-quality phase position conjugate light obtaining method and a phase position conjugate lens thereof. The invention belongs to the field of optics and aims at solving the problem of pool applicability of the existing strong-laser conjugate means by simply adopting the stimulated Brillouin scattering (SBS) technology. The invention provides a compound phase position conjugate method which combines BEFWM and SBS mechanisms as well as a phase position conjugate lens which applies the design of the method; wherein, high quality phase position conjugate light seeds are generated by the BEFWM; then high efficient amplifying is finished by BSBS amplifying, thus leading a device to have the advantages of non-threshold, high fidelity, stability and good transient state and steady state adaptability as well as high conversion efficiency, realizes to mutually complement the advantages of the two phase position conjugate technologies of BEFWM and SBS, and have high laser loading capacity. The compound effects of BEFWM and SBS are realized by controlling the polarization of each light beam and delaying the effect of each light beam. The invention is suitable for a high-power high-energy short-pulse strong-laser system in particular.

A laser device includes an outcoupling mirror, a laser medium, a phase-conjugate mirror based on stimulated Brillouin scattering, and an end mirror all arranged along an optical axis of the laser device. A controllable modulator is positioned between the phase-conjugate mirror and the end mirror. The outcoupling mirror and the end mirror form a start cavity. The outcoupling mirror and the phase-conjugate mirror form a main cavity.

A phase-conjugate mirror has a length of hollow core photonic crystal multi-spatial mode, polarization-maintaining fiber disposed in a vessel, with a compressible and preferably gaseous medium, such as Xe or CH4, occupying the hollow core of the of hollow core photonic crystal fiber and surrounding the exterior of the hollow core photonic crystal fiber. At least one sealed window is provided in the vessel, the at least one sealed window being optically coupled to at least one end of the length of hollow core photonic crystal fiber.

The present invention discloses a microscopy imaging structure with phase conjugated mirror and the method thereof. The afore-mentioned imaging structure produces a reverse focusing conjugated probe beam together with an original probe beam. These two probe beams meet at the focal point in the object body to be probed, and an interference pattern is produced. The interval between any two consecutive wave fronts in the interference pattern is then half of the wavelength of the original probe beam, and hence the vertical resolution of the image is improved. The present invention also applies a light modulator module on the probe beam to easily adjust the depth of the focal point of the probe beam and the phase conjugated reverse focusing probe beam in the object body. With the adoption of this invention, the size or position limitation of the target object is eliminated and the imaging resolution is also improved.

The invention discloses a double-pass laser amplification system and method based on a coaxially-disposed independent double-cell phase-conjugated mirror. The system comprises a laser device, a first polarizer, a first lambda/2 wave plate, a first Faraday magneto-optical rotator, a second polarizer, a laser amplifier, a third polarizer, a first 45-degree reflecting mirror, a second 45-degree reflecting mirror, a second lambda/2 wave plate, a third 45-degree reflecting mirror, a fourth 45-degree reflecting mirror, a fourth polarizer, a third lambda/2 wave plate, a second Faraday magneto-optical rotator, a fifth polarizer, a 90-degree optical rotator, a first lambda/4 wave plate, a stimulated brillouin scattering amplification cell, a second lambda/4 wave plate, a sixth polarizer, a positive lens and another stimulated brillouin scattering amplification cell. A delay reflecting mirror is arranged in front of the second Faraday magneto-optical rotator, a seventh polarizer is arranged behind the fourth polarizer, and an eighth polarizer is arranged behind the third polarizer. On the premise of guaranteeing quality of laser beams, output power of laser can be greatly increased.