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5068546 |
Solid state laser operating with frequency doubling and stabilized by an external resonator
Solid state laser comprising a solid state laser diode for generating fundamental wave laser radiation; an external ring resonator which is arranged in the beam path of the fundamental wave laser...
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5063566 |
Internally-doubled, composite-cavity microlaser
A microlaser is disclosed comprising: a gain medium having one face which is adapted be coupled to a source of optical pumping radiation and having an opposite face; harmonic conversion means...
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5060233 |
Miniature blue-green laser source using second-harmonic generation
Apparatus and method for producing coherent blue-green-light radiation having a wavelength of essentially 490-500 nm. A diode laser, such as a strained-layer InGaAs/GaAs diode laser, provides a...
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5058118 |
Self-frequency-doubling minilaser device with NYAB crystal as laser materials
A minilaser device exhibiting both laser and non-linear optical effects. The device includes a single laser crystal bar of NYAB which inhibits non-linear characteristics and serves as a...
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5051617 |
Multilayer semiconductor waveguide device for sum frequency generation from contra-propagating beams
Sum frequency generating devices are disclosed. The devices include a waveguide having a multilayer structure comprising at least one nonlinear semiconductor material. In a preferred embodiment,...
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5046802 |
Light wavelength converter
A light wavelength converter comprising a substrate that is made of a material with a non-linear optical effect, and a loop-shaped optical waveguide that is formed on the substrate, whereby a...
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5036220 |
Nonlinear optical radiation generator and method of controlling regions of ferroelectric polarization domains in solid state bodies
A nonlinear waveguiding optical converter in a solid state body. The waveguide is provided with compositionally differing region (domains) of dominant electrical polarization in succeeding regions...
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5034951 |
Femtosecond ultraviolet laser using ultra-thin beta barium borate
A laser pulse generator utilizes intracavity doubling in an ultrathin beta barium metaborate crystal to produce femtosecond pulses in the ultrashort ultraviolet wavelength range. The generator...
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5031182 |
Single-frequency laser of improved amplitude stability
A solid-state laser of improved amplitude stability is obtained by substantially eliminating spatial hole burning in the lasant material and maintaining the optical cavity of the laser at a...
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5030851 |
(RE.sub.x Y.sub.1-x Al.sub.3 (BO.sub.3).sub.4 crystals in electrooptic and nonlinear devices
Crystals of compounds of the type (RE) x Y 1 -x Al 3 (BO 3 ) 4 where (RE) is a rare-earth element or absent (x=O) are optically uniaxially negative and show the linear electrooptical effect and...
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5027361 |
Efficient laser harmonic generation employing a low-loss external optical resonator
TEM OOq laser radiation derived from a diode-pumped ring laser is directed into a faceted member of nonlinear optical material defining either a standing wave or ring monolithic optical resonator...
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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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5010555 |
Non-linear intractivity optical devices for free electron lasers
The performance of free electron lasers can be greatly enhanced by including a non-linear optical element within the resonator for the oscillator. A system is described to enhance the peak or...
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4987376 |
Frequency shifted laser transmitter
A compact, powerful, single slab laser oscillator-amplifier system immersed in a high pressure gas which acts as a Raman shifting medium to shift the oscillator output wavelengths from the...
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4972422 |
Second harmonic generator and information processing system using the same
A system for increasing frequency of a laser beam utilizes focused Cherenkov radiation. The system utilizes reflective/refractive properties of contiguous optics to achieve increased frequency,...
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4962979 |
Optical nonlinearity in organic and organometallic molecules via lattice inclusion complexation
There are disclosed a nonlinear optical element capable of second harmonic generation comprising a crystalline inclusion complex of a lattice-forming host compound crystallized with continuous...
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4961195 |
Systems for controlling the intensity variations in a laser beam and for frequency conversion thereof
In order to control the intensity of a laser beam so that its intensity varies uniformly and provides uniform illumination of a target, such as a laser fusion target, a broad bandwidth laser pulse...
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4959665 |
Laser printer with harmonic wave separation of the beam
In an information device which has a laser light source and a non-linear optical crystal for converting the laser fundamental wave light irradiated from the laser light source into harmonic wave...
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4955725 |
Laser oscillator/amplifier with compensation for stress birefringence
A laser oscillator/amplifier system in which thermally induced birefringence in the gain media of the oscillator is compensated by thermally induced birefringence in the gain media of the...
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4951293 |
Frequency doubled laser apparatus
A visible laser source comprises a sub mount. A semiconductor laser located on the sub mount has an active layer formed at a surface of the semiconductor laser. The active-layer formed surface of...
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4942582 |
Single frequency solid state laser
A solid state laser including a block of Nd:YVO 2 , Nd:YSAG, or Nd:YAB laser material having a cavity-defining mirror at one of its end surfaces is pumped by a laser diode pumping source having...
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4939388 |
Second harmonic generation by inclusion complexes of cyclodextrin compounds
Inclusion complexes of cyclodextrin compounds and suitable guest molecules are capable of second harmonic generation when illuminated by coherent optical radiation.
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4935931 |
Laser mode locking apparatus
The disclosure is directed to two embodiments for passive and one embodiment for active mode locking of lasers. The passive systems comprise a GaAs/GaAlAs diode laser (810 nm) pumped Nd:YAG (1964...
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4933945 |
Arrangement for converting the frequency of a laser beam
The invention is directed to a laser arrangement for converting frequency wherein the fundamental frequency or the converted frequency can be selectively emitted by means of an optical element...
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4933944 |
Laser mode locking method and apparatus
The disclosure is directed to two embodiments for passive and one embodiment for active mode locking of lasers. The passive systems comprise a GaAs/GaAlAs diode laser (810 nm) pumped Nd:YAG (1064...
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4930132 |
Second harmonic wave generating device having active layer and second harmonic wave generating layer on same substrate
A second harmonic wave generating device comprises: a substrate; an active layer formed on said substrate and adapted for generating light of a wavelength λ in response to the injection of a...
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4922496 |
Armonic generation in optical fibers
Apparatus for providing self-organized, phase-matched harmonic generated radiation which includes a single-mode fiber doped with ytterbium or ytterbium-aluminum which is placed in a laser cavity...
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4913533 |
KTP crystal nonlinear optical device with reduced drift and damage
A KTP crystal in a nonlinear optical device is heated to and operated at a temperature of at least 50° C. and less than 350° C., and more preferably about 90° C. to about 200° C., and most...
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4910740 |
Second harmonic generation
A second harmonic generator having a non-linear optical crystal element for generating a second harmonic laser light. In this second harmonic generator, a birefringent element is inserted into a...
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4907238 |
Apparatus for the efficient wavelength conversion of laser radiation
An apparatus for generating coherent radiation at a desired frequency is disclosed. In a preferred embodiment the apparatus comprises: an injection-locked semiconductor diode structure having a...
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4897562 |
Process and apparatus for efficient sum and difference frequency generation
Output efficiency in optical parametric mixing of at least two source laser beams to produce new frequencies representing the sum or difference of the source beams--where at least one source beam...
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4896326 |
Peak power fluctuations in optical pulse compression
Fluctuations in input intensity and pulsewidth affect the frequency doubled output pulse of a fiber grating optical pulse compressor in a compressed, continuous-wave, mode-locked Nd:YAG laser...
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4887270 |
Continuous wave, frequency doubled solid state laser systems with stabilized output
A solid-state laser system for producing a frequency-doubled CW laser output beam having a stabilized output. The laser system includes within a three-mirror resonator cavity, a Nd: YAG laser rod...
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4879722 |
Generation of coherent optical radiation by optical mixing
An efficient, compact source of coherent radiation in the infrared, visible and ultraviolet portion of the spectrum which is capable of modulation rates over the range from O Hz to in excess of 1...
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4876688 |
Frequency doubling crystals
A systematic approach to the production of frequency conversion crystals is described in which a chiral molecule has attached to it a "harmonic generating unit" which contributes to the...
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4872177 |
Laser diode pumped solid state laser
A neodymium or other rare earth doped solid state laser is pumped by a matched high efficiency laser diode, including a diode array and a multi-spatial mode extended emitter diode, resulting in a...
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4867510 |
Device and method for doubling the frequency of elecromagnetic radiation of a given frequency
A device and method for doubling the frequency of electromagnetic radiation of a given frequency are described. The device comprises a substrate (1) on which is provided a first layer (2) and a...
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4866720 |
Multicolored laser source
A method for efficiently producing a multicolored laser beam. The second harmonic of a 1.06 micron wavelength laser beam is produced from a YAG laser. The second harmonic has a wavelength equal to...
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4862473 |
Semiconductor laser apparatus having a high harmonic generating waveguide
A semiconductor laser apparatus includes a groove of a specified length that is formed by etching an end portion of a semiconductor laser element, and a higher harmonic generating device having a...
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4856006 |
Higher harmonic generating device
A semiconductor harmonic generating device comprising a nonlinear medium and a waveguide which is provided in the upper face of the nonlinear medium. A higher harmonic laser light from a...
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4852961 |
Nonlinear optical waveguide device including grating for changing of the wavelength of light
A device for the changing of the wavelength of light comprising a non-linear optical crystal, first and second optical waveguides that are formed in the non-linear optical crystal, and an...
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4841528 |
Frequency doubled, cavity dumped feedback laser
Higher efficiency in cavity dumping and frequency doubling in a laser used to produce modulated output beam pulses is achieved by deflecting light out of the resonant cavity to a third mirror...
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4824220 |
Device for forming an image with a laser beam
A device for forming an image with a laser beam is disclosed. The device comprises a laser, means for on-off modulating a laser beam, means for converting a wavelength of the laser beam generated...
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4818899 |
Second harmonic generation by carbamic acid derivatives
Devices for and method of generating coherent second harmonic light radiation. The devices comprise a laser source of coherent light radiation at a fixed fundamental frequency, a crystalline N-aryl...
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4809291 |
Diode pumped laser and doubling to obtain blue light
A source of coherent blue light comprises a diode laser for pumping a Nd 3 + doped member of lasant material disposed within an optical resonator for exciting the 4 F 3 /2 - 4 I 9 /2 laser...
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4808789 |
Diode-pumped-laser instrumentation system
A semiconductor-diode-pumped solid-state laser instrumentation system for use in industrial materials processing, spectroscopy, medical surgery, metrology, fiberoptic communication, and related...
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4809281 |
Free-electron laser
A free-electron laser capable of operation at a shorter wavelength than the fundamental lasing wavelength, but without any increase in electron energy requirements. The laser includes a...
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4794605 |
Method and apparatus for control of phase conjugation cells
A technique in which one or more phase conjugation cells, such as stimulated Brillouin scattering cells, are controlled by use of a seed beam injected into the cells. When a laser beam is focused...
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4791631 |
Wide tolerance, modulated blue laser source
A process and apparatus are disclosed for producing a beam of coherent radiation at essentially 459 nm by mixing, in a nonlinear crystal consisting essentially of KTP, two laser beams, one at...
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4764933 |
Diode pumped low doped Nd .sub.3+ glass laser
A semiconductive diode pumped Nd:glass laser is disclosed in which standard low-loss Nd:glass is employed as the gain medium. In some embodiments, miniature optical resonators are employed for...
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