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3934210 |
Tuning apparatus for an optical oscillator
One or more birefringent plates are placed within the optical cavity of an optical oscillator such as a dye laser. Each of the plates is positioned at an angle, such as Brewster's angle with...
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3924201 |
Laser apparatus employing mechanical stabilization means
A laser includes a lasing medium and two Porro prism end reflectors with the roofline of each prism being at an angle between about 5° -85° with respect to the plane of polarization and optically...
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3902137 |
Electro-optic diffraction grating tuned laser
An electro-optic diffraction grating tuned laser comprising a laser medium, utput mirror, retro-reflective grating and an electro-optic diffraction grating beam deflector positioned between the...
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3868590 |
NARROW BANDWIDTH DYE LASER
A dye laser has a dye cell containing a lasable dye material. A diffraction grating and a partially reflective mirror form an optical cavity having an axis through the dye cell coincident with the...
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3868592 |
IMPROVED TUNING APPARATUS FOR A DYE LASER
One or more birefringent plates are placed within the optical cavity of a dye laser. Each of the plates is positioned at an angle, such as Brewster's angle with respect to the light reflected...
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3863177 |
METALLIC PENTAPHOSPHATE GLASSES AND USES THEREFOR
There are disclosed various embodiments of a laser in which the dielectric active medium is a rare earth pentaphosphate glass, for example, neodymium pentaphosphate glass. These glasses are...
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3838358 |
LASER ARRANGEMENTS INCLUDING CATADIOPTRIC ELEMENTS MADE FROM GRADED-INDEX OPTICAL FIBERS
A catadioptric element (which is equivalent in effect to a spherical mirror) is made by depositing a high-reflectivity coating on one of the flat ends of a cylindrical segment of a graded-index...
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3835414 |
GALLIUM ARSENIDE ARRAY
A gallium arsenide laser array in which laser modules are mounted on a printed circuit support plate. Each module has a housing creating a cavity and shaped substantially as a pair of cones with...
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3835415 |
HIGH RADIANCE SEMICONDUCTOR LASER
A diffraction-limited semiconductor laser system capable of a high radiance output which features means for controlling automatically the alignment of a p-n junction of the semiconductor laser with...
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3825856 |
LASER GENERATOR FOR SINGLE TRANSVERSE MODE OPERATION
A laser generator which oscillates in a single transverse mode comprises an amplifying medium placed within a resonator consisting of two oppositely facing mirrors. Provision is made within the...
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3817604 |
METHOD OF FOCUSING A HIGH-POWERED LASER BEAM
A method of providing a focal spot position independent of the input optical power of a laser beam. A negative lens is interposed such that focal spot motion caused by a changing refractive index...
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3813613 |
LASER EMPLOYING A METALLIC PENTAPHOSPHATE
There are disclosed various embodiments of a laser in which the dielectric active medium is a rare earth pentaphosphate, for example, neodymium pentaphosphate. The neodymium pentaphosphate laser...
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3805015 |
LASER APPARATUS SUPPORTED BY AN OPTICAL BENCH
Workpieces are fed in succession to a laser beam to be machined thereby, the laser beam being produced by a laser resonator oscillating in the fundamental transverse mode and incorporating a laser...
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3805187 |
DAMAGE RESISTANT TUNABLE CW DYELASER
A damage resistant tunable continuous wave (cw) dye laser comprising a hydro-dynamically contoured interaction region, with a thick input window which is coated to be optically inert to the pumping...
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3792370 |
IMPROVED OPTICAL CAVITY FOR A LASER
A catoptric lens arrangement which is adapted to use with high power radiant energy, as from a laser, is shown. The entrance mirror of the contemplated lens arrangement has a convex reflective...
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3777280 |
LASER GENERATOR OF TE WAVE GUIDE MODES
Propagating radiation with rotationally symmetric optical modes of the TE 01 (and TM 01 ) type show promising properties for future applications. For their generation, laser cavities inherently...
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3766491 |
RADIATION AND PRESSURE BROADENING TECHNIQUE FOR SINGLE FREQUENCY GAS LASERS
Single frequency operation is achieved in a gas laser by mutually adapting the total gas pressure and the radiation density so that twice the radiation-broadened homogeneous linewidth is greater...
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3750048 |
WINDOW FOR HIGH POWER GASEOUS LASERS
In a gas laser capable of ultra high power, a cylindrical mirror mounted to receive the laser beam, diverge it, thereby lowering the power density. A cylindrical lens, acts as the seal and window,...
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3739296 |
LASER SYSTEMS AND LASER CONTROL SYSTEMS
A laser resonator includes nodally-mounted, passive, refractive or reflective image-forming means separate from the lasing medium and conjugate reflective surfaces on which conjugate images are...
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3735283 |
BEAM DIAMETER CONTROL FOR P LASER HAVING IMPROVED COHERENCE
A pulsed laser and preferably one with a solid laserable material is caused to oscillate substantially in a single mode to increase its coherence length. This is accomplished by the provision of...
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3735278 |
DEVICE FOR WAVELENGTH SELECTION IN LASERS WITH BROAD-BAND EMISSION
In a device for wavelength selection in dye lasers with a broad-band emission, and which comprises in axial alignment a light source, a laser cell, a directional filter including an apertured stop,...
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3707687 |
DYE LASER TUNABLE BY LONGITUDINAL DISPERSION IN THE DYE CELL
A single mirror serves both as the output mirror for the pumping gas laser and the high reflectance mirror for the dye laser. THe mirror is formed on one surface of a lens having a low dispersion...
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3696310 |
MODE-LOCKING IN SEMICONDUCTOR LASERS
In order to achieve longitudinal mode-locking in a semiconductor laser, the normal dispersion of a semiconductor medium is compensated for by means of an intracavity dispersive structure, thereby...
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3685882 |
SELF-ALIGNED GAS ASSISTED LENS FOR LASER BEAM APPARATUS
A self-aligned gas assisted lens for a laser beam apparatus wherein the orifice through the sheet aperture is formed by the laser beam and consequently is in exact alignment with the laser beam and...
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3679313 |
DISPERSIVE ELEMENT FOR OPTICAL PULSE COMPRESSION
An interferometer cavity defined by two mirrors of different reflectance is advantageously adjusted to achieve superior compression of optical pulse signals. In particular, a mirror of...
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3680000 |
LASER ARRANGEMENT INCLUDING A CAVITY DEFINED BY CONVEX AND CONCAVE MIRRORS
A laser cavity defined by convex and concave mirrors and including a discrete intracavity lens is characterized by a relatively large TEM oo spot radius, a short physical length and good stability.
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3670258 |
FREQUENCY-DOUBLED NEODYMIUM DOPED GLASS LASER UTILIZING A LITHIUM NIOBATE CRYSTAL
A frequency-doubled neodymium doped glass laser is provided in which a narrow spectral bandwidth, high-radiance neodymium doped glass laser is used to irradiate a lithium niobate crystal which is...
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3670260 |
CONTROLLED OPTICAL BEAM FORMING DEVICE
A controlled optical beam forming device distributes the light from a collimated source such as a laser within a controlled solid pattern with any desired relative intensity distribution. The...
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3655993 |
OPTICALLY ROTATORY DIELECTRIC-GUIDED PARAMETRIC OSCILLATORS
There is disclosed a parametric oscillator having reduced optical loss and increased interaction pathlength because it employs an optically rotatory liquid in a capillary tube of lower refractive...
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3643178 |
ELECTROMAGNETIC RADIATION BEAM DIRECTING SYSTEMS
A dirigible beam of coherent radiation is generated by using a fixed birefringent element (Calcite plate) and a variable birefringent (Kerr cell) as a directional filter in combination with an...
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3638139 |
FREQUENCY-SELECTIVE LASER DEVICES
Because the index of refraction in a discharge gas column varies as a function of frequency and radius, light rays of different frequencies are diffracted different amounts as they traverse the...
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3626322 |
METHOD AND APPARATUS FOR ELIMINATING DOMINANCE OR LASER OSCILLATIONS AT ONE WAVELENGTH OVER THOSE AT ANOTHER
Method and apparatus for eliminating in a laser the dominance of laser oscillations at one wavelength of the laser medium over laser oscillations at another wavelength of said laser medium. The...
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3626317 |
DIGITALIZED SCANLASER
Generally, the disclosure describes a scanlaser with a fly's eye lens array for discretized or digitalized beam steering via mode selection. In a scanlaser, a localized change in birefringence...
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3622739 |
DEVICE FOR THE PRODUCTION OF A LASER BEAM FOR DRILLING WATCH JEWELS
A laser beam is produced for drilling watch jewels by a resonator and a focusing lens system. The resonator comprises a rod of active material mounted between two planer reflectors and energized by...
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3611184 |
LASER OPTICAL SYSTEM HAVING DIVERGENT COMPONENT
A laser optical system has, in place of the normally plane-parallel partly transmitting output reflector element, an element having a concave or convex forward face, and a concave rear face, such...
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3602724 |
OPTICAL NONLINEAR DEVICES
A group of devics are set forth that individually employ a transparent nonlinear dielectric element, such as a piezoelectric crystal, in the cavity of a laser. The crystal serves to generate...
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3599112 |
LASER HAVING A TELESCOPIC SYSTEM RELATED TO THE OUTPUT REFLECTOR TO KEEP THE DIRECTION OF THE OUTPUT BEAM CONSTANT
Apparatus for generating a laser beam in a constant spatial direction by a laser tube between a spherical resonator reflector and a spherical semipermeable tune-out reflector, includes a telescopic...
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3586998 |
PULSED LASER OUTPUT CONTROL
"Giant pulse" laser apparatus is described in which an absorber material is disposed in the resonant cavity in a concentrated portion of the beam of light emitted by the pumped working medium...
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3586816 |
SPOT WELDING SYSTEM AND METHOD
A system and method for microscopic spot welding with laser radiation. The invention, having particular relationship to microscopic multiple spot welding, employs mode selection of laser emitted...
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3581228 |
SIMULTANEOUS TRANSVERSE AND LONGITUDINAL MODE LOCKING IN A LASER EMPLOYING AN ACTIVE ABSORPTION CELL
A laser that oscillates in multiple transverse and longitudinal modes is pulsed by a mutual adaptation of an absorption cell having a substantially matching absorption line and the other components...
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3566128 |
OPTICAL COMMUNICATION ARRANGEMENT UTILIZING A MULTIMODE OPTICAL REGENERATIVE AMPLIFIER FOR PILOT FREQUENCY AMPLIFICATION
A narrow band laser regenerative amplifier for a multiple-mode optical signal is included in the receiver of an optical transmission system in which a pilot, transmitted together with an...
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3532879 |
METHODS AND APPARATUS FOR DEFLECTING ATOMS
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3522553 |
PULSED LASER EMPLOYING AN ACTIVE ABSORPTION CELL
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3521190 |
LIQUID LENS LIQUID LASER CELL
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3518419 |
PROJECTION SYSTEM FOR CIRCULAR ARRAY OF LASER DIODES
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3517333 |
COHERENT OPTICAL DEVICES EMPLOYING INDUCED INHOMOGENEITIES IN NONFERROELECTRIC CRYSTALS
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3516013 |
SCANNING LASER HAVING A CONJUGATE CONCENTRIC CAVITY SO THAT THE DIRECTION IN WHICH LIGHT IS EMITTED CAN BE CONTROLLED
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3513410 |
LASER BEAM POWER DENSITY CONTROL FOR Q-SWITCHING
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3508166 |
PASSIVE OPTICAL ISOLATOR
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3506928 |
RADIATION SCANNING APPARATUS
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