Matches 351 - 400 out of 478 < 1 2 3 4 5 6 7 8 9 10 >
Match Document Document Title
4723247 Phase conjugating plasma mirror free electron laser  
A self-aligning, high-power, free electron laser (FEL) oscillator 10, comprises a self-aligning feedback, element 12 located near the electron beam input end 14 l of the FEL wiggler 16; a partially...
4713822 Laser device  
The present invention relates to a laser device in which an optical resonator and a slab-geometry laser medium are dioposed within said optical resonator. There is also a pump which optically...
4706256 Fritless endbell assembly  
An endbell assembly operatively associated with a laser body includes a metal endbell component sealed to a crystalline endbell component which terminates with a crystalline optical component. The...
4698816 Optical transmission filter  
The present invention deals with an optical transmission filter for effecting differential phase delay upon light in a beam polarized in a P dimension, as a function of position within the filter...
4694457 Methods of steering and focusing ion and electron beams  
An ion or electron beam is steered or focussed by a circular magnetic field produced by passing a large electrical current through a straight conducting wire, the magnetic field being co-axial with...
4692583 Surface heat treating apparatus  
A surface heat-treating apparatus which focuses laser beam onto a surface of a workpiece for heat-treating the same comprises a composite cylindrical segment mirror and a cylindrical mirror...
4672615 Ion and electron beam steering and focussing system  
An ion or electron beam is steered or focussed by a circular magnetic field produced by passing a large electrical current through a straight conducting wire, the magnetic field being co-axial with...
4660204 CO.sub.2 TEA laser utilizing an intra-cavity prism Q-switch  
A CO 2 TEA laser utilizing an intra-cavity rotating prism Q-switch (70) for angularly switching the resonator gain by periodically causing the resonator mirrors (54, 56) to be in alignment. An...
4656641 Laser cavity optical system for stabilizing the beam from a phase locked multi-emitter broad emitter laser  
A laser cavity optical system is provided for stabilizing the laser far field dominate lobe so that no beam shift occurs. The laser cavity optical system comprises a lens system positioned at one...
4653056 Nd-YAG laser  
A neodymium YAG laser is pumped by a matched laser diode of high efficiency, resulting in a compact, high-efficiency and long-lifetime laser assembly. Output is in the near infrared range, but can...
4627068 Fiber optics interface for a dye laser oscillator and method  
A dye laser oscillator in which one light beam is used to pump a continuous tream of dye within a cooperating dye chamber for producing a second, different beam is generally disclosed herein along...
4575645 Compact Raman oscillator-amplifier optical system  
A Raman oscillator and amplifier utilizing a single Raman cell. The oscillator and amplifier portions of the cell are located either coaxially or adjacent to each other within a single Raman cell...
4575849 Optical filter polarizer combination and laser apparatus incorporating this combination  
The present invention deals with an optical filter polarizer combination providing a spacial transmission function to polarized incident light. When the light is in the form of a beam the...
4564268 Optical system for semiconductor laser  
An optical system for focusing a light beam emitted from a semiconductor laser is disclosed which comprises a lens of a numerical aperture NA satisfying a relation ##EQU1## (where λ and ΔZ...
4554666 High-energy, single longitudinal mode hybrid laser  
The use of a Galilean telescope, situated in between the two lasing mediums that are located within the resonant cavity of a single longitudinal mode hybrid laser, increases the effective mode...
4509175 Segmented YAG laser rods and method of manufacture  
The disclosure is of a segmented YAG laser rod having segments cemented together and its method of manufacture.
4504950 Tunable graded rod laser assembly  
A tunable laser assembly including a pair of radially graded indexed optical segments aligned to focus the laser to form an external resonant cavity with an optical axis, the respective optical...
4494235 Multiple wavelength laser  
A pulsed or CW laser is rapidly switched to operate at one or more selectable wavelengths by means of intracavity insertion of beam dispersion and focussing elements and an apertured focal plane...
4484334 Optical beam concentrator  
An optical beam concentrator divides and redirects an incident beam to provide uniform irradiation along the length of a narrow rectangular area. The beam concentrator may form a part of an...
4475201 Longitudinally pumped dye laser arrangement  
A longitudinally pumped dye laser arrangement is disclosed. The arrangement comprises a unitary optical means, means for containing a lasing medium dye solution and means for reflecting lasing...
4461009 Output coupler for laser resonator  
A laser output coupler utilizes a birefrigent lens which has one side thereof curved so as to present a non-uniform polarization distribution across the face of the lens. A polarized beam splitter...
4426708 Laser device  
Laser device comprising a tube for gaseous or vaporous laser material, which tube is sealed at both ends by a window consisting of a plate of radiation-transmissive material. Each window plate...
4426707 Single mode cavity laser  
This external cavity laser utilizes an unstable resonator in conjunction with a high reflectivity stripe end mirror which is oriented substantially parallel to the plane of the maximum divergence...
4425655 Direct focussed gas laser  
A direct focussed gas laser 9 wherein the last surface 40, 48A, 48B of the output mirror, in the case of a laser where the mirrors are integral to the ends of the laser tube envelope, is shaped...
4310808 High power laser employing an unstable resonator  
The high power laser includes a high gain medium (>80%) such as a lightly doped Nd:YAG rod contained within an unstable optical resonator of the type wherein power flows outward from the optical...
4246548 Coherent semiconductor injection laser array  
Disclosed is a spatially coherent semiconductor injection laser array. The system comprises a plural element laser diode array placed symmetrical in respect to an optical axis. An external...
4241318 Fast-switching multi-wavelength laser  
The laser comprises an amplifying medium placed between a first reflector and a second dispersive reflector, and a rotating wheel adapted to carry a plurality of optical deflector elements...
4229078 Hydro-optical modulator for modulating transmission of radiation  
The hydro-optical modulator has a purged and hermetically sealed thin liq cell with a working liquid throughout an enclosed sealed container that is in working contact with a pressure modulating...
4185891 Laser diode collimation optics  
The present invention related to optical collimating systems and has particular reference to beam compression of laser diode emission.
4163200 Laser beam arrangement  
The essence of the invention resides in the creation of a laser beam of a flat planar cross section. This function is accomplished by providing a dual surface concave lens and two parabolic...
4158176 Spatial filter system as an optical relay line  
A system consisting of a set of spatial filters that are used to optically relay a laser beam from one position to a downstream position with minimal nonlinear phase distortion and beam intensity...
4156209 Lens free of back focal points for use with high power light beams  
A meniscus lens is disclosed for use in high power light beam applications, such as in the optics of a high power laser where the laser beam intensity is in excess of one megawatt per square...
4156206 Grating coupled waveguide laser apparatus  
A semiconductor laser and optical waveguide are coupled together along a common optical axis and bounded at remote ends with reflective surfaces to form an optical resonant cavity. A periodic...
4151487 Laser cavity structure  
A laser cavity structure in which the laser gain medium is located outside the resonant cavity and optically connected to the cavity through a hole in one of the cavity mirror by means of an...
4127827 Optimized mode-locked, frequency doubled laser  
In a solid state, folded cavity, laser having a fundamental frequency and a second harmonic frequency, the efficiency of the laser is improved by placing a quarter wave plate, at the lower...
4118675 Laser tuning with an acousto-optic lens  
A pulsed laser having a laser gain medium of broadband output is tuned to essentially monochromatic output. An acousto-optic cell is driven with an acoustic wave which varies linearly in frequency,...
4105953 Chirped acousto-optic Q switch  
An improved acousto-optic laser Q-switch utilizing a chirped fm pulse in the acousto-optic cell to diffract and focus the input beam into a resonating high-Q mode. When the rf acoustic pulse is not...
4088964 Multi-mode threshold laser  
An image amplifying multi-mode laser with image forming elements in the cavity and with a saturable absorber film at the focal plane in the cavity. Radiation from each point of an image is focused...
4032861 Laser device for altering surfaces in accordance with given patterns  
A high gain optically pumped laser device includes a mask having cut-out portions defining a given pattern disposed in the resonant optical cavity defined between end mirrors at opposite ends of...
4028636 Acousto-optical deflector tuned organic dye laser  
An acousto-optical deflector tuned organic dye laser wherein the tuning eent comprises a diffraction grating and a Bragg diffraction cell driven by an RF responsive, ultrasonic transducer. An...
4011523 Azimuthal mode control for laser  
Azimuthal mode control for lasers employs an optical system which rotates the image to produce an optical feedback system, which through interference with the cavity fields, supresses the unwanted...
3986129 Generation of submicrosecond pulses in a long laser  
A standard cavity, Q switched laser is used to initiate and sustain submicrosecond pulses in a long laser. Short pulses from the standard cavity laser are directed onto the remote reflector of a...
3975693 Dual function laser for space laser communications  
A Nd:YAG laser operating in a dual functioning cavity with a Ba 2 Na(NbO 3 ) 5 frequency doubling crystal provides two frequencies of laser radiation, one frequency double the other, to provide a...
3974507 Conversion of stripe-geometry junction laser emission to a spherical wavefront  
In a micrographics system of the type in which holes are machined in a thin film by means of a laser (see, for example, reissue U.S. Pat. No. 28,375 of D. Maydan, M. I. Cohen and R. E. Kerwin,...
3970960 Broadly tunable continuous-wave laser using color centers  
Broadly tunable infrared lasers analogous to dye lasers operating in the visible spectrum are provided by significant improvements upon an F A (II) color center laser previously demonstrated in a...
3968456 Regenerative laser device  
A regenerative laser device having remotely located optical components. A resonant cavity having a plurality of transverse modes is defined at one end by a highly reflective retrodirective member...
3964003 Arc operated Q switch for laser  
A laser beam is passed between a pair of electrodes, the switching of the beam being accomplished by generating an arc between the electrodes whereby metal vapor is ablated therefrom. The metal...
3959739 Electro-optic tuning of organic dye laser  
An electro-optically tuned organic dye laser having an electro-optic cell d a diffraction grating. A varying electrical field is supplied to the cell to cause the laser beam to be swept across the...
3938058 Tunable laser  
A tunable laser is disclosed in which a plurality of laser beams different from one another in wavelength and polarization can be simultaneously oscillated. The tunable laser is advantageous among...
3936770 Single laser cavity for generating TE or TM modes  
A dye laser, pumped by a nitrogen laser, has been made to operate in both the TE 01 and TM 01 rotationally symmetric modes, regardless of the variation in laser wavelength. By changing the...
Matches 351 - 400 out of 478 < 1 2 3 4 5 6 7 8 9 10 >