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5136598 |
Modulated high-power optical source
An apparatus for generating a relatively high-power, modulated optical beam s disclosed. The apparatus comprises a first element for emitting a relatively low-power laser beam at a preselected...
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5132980 |
Method and device for preconditioning a laser having a solid state gain medium
A method and device for preventing premature optics burn-out in a laser having a solid gain medium is provided. The invention involves preheating the gain medium by supplying power at a level which...
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5128956 |
Semiconductor laser module with built-in optical isolator
In a semiconductor laser module with a built-in optical isolator which isolator consists of a polarizer, a Faraday rotator and an analyzer, an optical refraction sheet having a wedge-shaped section...
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5124993 |
Laser power control
A laser power control system is disclosed which detects the power of an emtted laser beam. The detection is preferably accomplished by splitting the beam using a beam splitter to form a detector...
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5119385 |
Parametric pulse laser
Light input means inputs exciting pulse light beams to a parametric oscillator simultaneously in a plurality of directions. The parametric oscillator including a parametric element such as a urea...
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5117433 |
Second harmonic generator for obtaining an aberration free plane wave and information processing system using the same
A second harmonic generator of the present invention utilizes Cerenkov radiation as a useful coherent short-wavelength light source. The second harmonic generator includes an aberration correction...
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5084883 |
Laser scanning system for use in laser imaging
A laser scanning system for scanning a laser beam across a material, comprises a laser source for generating a laser beam travelling along a first optical path and a beam reflector in the path of...
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5081639 |
Laser diode assembly including a cylindrical lens
The present invention provides a diffraction limited, high numerical aperture (fast) cylindrical microlens. The method for making the microlens is adaptable to produce a cylindrical lens that has...
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5073041 |
Integrated assembly comprising vertical cavity surface-emitting laser array with Fresnel microlenses
An array of Fresnel microlenses is fabricated directly on the planar output surface of an array of vertical cavity surface-emitting lasers. A compact integrated assembly comprising precisely...
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5058124 |
Semiconductor device and piezoelectric stack optical mounting assembly
An external cavity laser assembly in which the laser chip is within a hermetically sealed package and the external cavity is outside the hermetic package. A collimating lens in a screw threaded...
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5050179 |
External cavity semiconductor laser
An external cavity semiconductor laser comprising a resonance cavity coupled to a diode laser. The cavity may contain a lens or lens system or may be constructed as an optical waveguide. The...
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5048050 |
Semiconductor laser apparatus
A semiconductor laser apparatus includes a fitting member having first and second openings connected each other and concentric with each other, the first opening serves as a semiconductor laser...
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5048051 |
Optically-stabilized plano-plano optical resonators
An optically-controlled lens is used to stabilize a plano-plano optical resonator. The lens is made of a material whose shape, refractive index, or both can be changed by optically-induced...
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5046070 |
Longitudinally laser pumped laser with compensation for thermal lens effects
A laser system is disclosed wherein a solid state gain medium (30) is longitudinally pumped with the beam (40) from another laser (42). The laser is configured with an optically stable resonator...
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5036520 |
Holmium laser pumped with a neodymium laser
A solid-state laser device includes a neodymium laser pump source capable outputting a pump beam of about 1.1 μm wavelength, and a holmium laser being pumped by said 1.1 μm pump beam to generate...
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5033052 |
Optical semiconductor device and production method thereof
In an optical semiconductor device which comprises a mount (52a) for holding an optical semiconductor element (40) and a lens holder (54a) which holds a lens (50) for converting a beam shape of a...
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5033060 |
Optical device for laser coupling and coherent beam combining
An apparatus for generating a coherent combined laser beam including an array of laser elements for generating a Fresnel diffraction pattern in a plane at a distance D from the laser array, the...
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5028967 |
Achromatic lens for ultraviolet rays
An achromatic lens for ultraviolet rays constituted by (A) high-purity silica glass having a purity of 99.9% or more, or fluorine-containing, high-purity silica glass having a purity of 99.9% or...
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5027359 |
Miniature Talbot cavity for lateral mode control of laser array
An apparatus for coherent beam combining of lasers and for lateral mode control is disclosed, comprising a miniature Talbot cavity having at least a first and second surface. The first surface is...
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5025446 |
Intra-cavity beam relay for optical harmonic generation
Intra-cavity generation of second and higher harmonic frequency laser radiation is improved by inclusion of a lens or multiple-lens arrangement that focuses electromagnetic radiation emitted by the...
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5018831 |
Optical resonant device
An optical resonant device comprises a laser diode (14), a graded-index collimating lens (11) and a prism grating (17). The lens (11) is rigidly connected to the prism grating (17). Coarse tuning...
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5012483 |
Narrow-bandwidth diffraction-limited coupled stable-unstable resonator laser cavity
A laser cavity providing high power laser radiation with diffraction-limi divergence and narrow-bandwidth comprises: a stable laser cavity including a gain medium, which generates and amplifies...
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5008892 |
Semiconductor laser diodes
A semiconductor laser diode in which oblate-spheroidal modes are established to enhance emitted beam characteristics. The laser diode laser cavity ends are configured in the shape of Fresnel lenses.
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5001718 |
Telescopic thermal lens compensating laser
In order to compensate for the thermally induced lens in the active element of an optical stage of a laser, the optical stage is provided with a telescope. The telescope comprises first and second...
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4995050 |
Diode laser with external lens cavity
A diode laser external lens cavity configuration having a stripe mirror with two thin parallel stripes placed in front of the two lobes of the arrays for far field output pattern. The configuration...
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4980896 |
X-ray lithography system
An x-ray lithography system is disclosed in which x-rays are generated by directing a high energy laser beam against a metal target to form an x-ray emitting plasma. The x-rays from the plasma are...
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4979180 |
Modular interchangeable laser system
A modular interchangeable laser instrumentation system for applications in industrial processing, medical surgery and treatment, dental treatment, metrology, military applications, forensic...
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4969156 |
Laser cavity having an adjustable optical path length extender
A laser is disclosed which includes an optical path length extender for increasing the optical path length of the laser cavity. The path length extender, which is disposed inside the laser cavity...
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4949358 |
Ring laser with improved beam quality
A rod laser having a ring cavity configuration, and including a polarization rotator to compensate for birefringence of the laser's rod. Preferably, the rotator is a 90° crystal quartz rotator. In...
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4947402 |
Two-mirror shaping of a non-circular optical pumping beam and lasers using same
In a laser, the laser gain member is optically pumped by a semiconductive source of pumping radiation having an elongated output beam aperture such as that provided by a single-wide stripe diode or...
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4942586 |
High power diode pumped laser
A single cavity laser device comprises a diode pumped laser medium having a relatively high gain but a relatively low power. With this medium, a control laser beam is generated. Also positioned in...
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4935939 |
Surface emitting laser with monolithic integrated lens
A surface emitting laser is described with a monolithic integrated lens formed in one side of an optical semiconductor substrate aligned with a parabolic light reflective mirror surface formed...
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4934784 |
Hybrid active devices coupled to fiber via spherical reflectors
Multiple reflection modules having as a light source or a light target a lensed optical fiber employ one more spherical reflectors and wavelength selectors for selecting the wavelengths of optical...
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4918702 |
Laser unit
A laser unit includes a laser source for emitting a laser beam, a collimator lens for collimating the laser beam emitted from the laser source, a supporting member, made of a good thermal...
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4887276 |
Shared aperture sampler
An improved shared aperture sampler for high power laser beams includes a buried mirror positioned behind a dichroic reflective surface that reflects the high power beam and permits the sample beam...
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4885752 |
Crystal modulated laser with improved resonator
The laser (10) has a crystal modulator (22) located at one end (16) of the laser gain medium (12) opposite the end (14) to which the total reflector or grating (18) is attached. The outcoupler (28)...
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4875219 |
Phase-conjugate resonator
By incorporating a phase-conjugating process (Stimulated Brillouin Scatteg) with a master oscillator power amplifier laser cavity, a new phase conjugate resonator (PCR) is obtained. The PCR...
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4866730 |
Distributed feedback laser
A laser with distributed feedback utilizes an active laser medium, especiy a dye solution contained in a cell, excited by a pump radiation beam that passes through an optical grating or like...
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4852567 |
Laser tipped catheter
A laser catheter for insertion in a body passage and for treatment of a relatively inaccessible location with laser radiation in a preselected first wavelength range, typically in the mid-infrared...
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4827485 |
Diode pumped solid state laser
A diode pumped Nd:YAG laser is disclosed wherein the YAG laser rod is supported from the envelope of the pumping diode by means of telescoping glass tubes bonded together by means of u.v. curing...
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4817102 |
Acousto-electromagnetic hologistic resonant system
A laser is comprised of a lens, a cavity and an excitation source. The lens comprises a paraboloidically/ellipsoidally curved RF photon transparent element comprised of a periodic superlattice of...
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4809293 |
Optical component of a laser
An optical component of a laser, of the type including a hot gas plasma region, a cold gas region, and producing large photon fluxes, includes an optical element and a coating means on a surface of...
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4803694 |
Laser resonator
To generate a laser beam of significantly higher quality and high output power without damaging the output coupler (mirror), a novel stable optical laser resonator includes, in particular, a...
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4791650 |
Phased-array semiconductor laser apparatus
A phased-array semiconductor laser having a plurality of light emitting regions aligned in a line and providing correlation of the oscillation phases between adjacent light emitting regions, and...
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4779278 |
Laser apparatus and method for discriminating against higher order modes
Disclosed is a laser apparatus and a related method for use with a laser medium of a type which emits a beam of coherent laser energy having both low and high order modes. End reflectors are...
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4745618 |
Optically stable resonator for producing a laser beam
An optically stable resonator producing a laser beam which by the use of a converging and of a diverging optical element is subdivided into an amplifier part with large beam diameter and small...
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4742522 |
Free-electron laser system with raman amplifier outcoupling
Apparatus and a related method for controlling the characteristics of a high-power laser beam to provide a desired beam divergence, spectral content, and phase. A high-power beam, as from a...
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4739507 |
Diode end pumped laser and harmonic generator using same
A second harmonic, optical generator is disclosed in which a laser diode produces an output pumping beam which is focused by means of a graded, refractive index rod lens into a rod of lasant...
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4731795 |
Solid state laser
An optically pumped solid state laser which is constructed of components held in association by a support structure which is configured to receive the components and automatically arrange them with...
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4730335 |
Solid state laser and method of making
An optically pumped solid state laser which is constructed of components having attached fittings which are structured in such a manner that the components are automatically arranged with respect...
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