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5216681 |
Highly-efficient solid-state blue laser
A highly-efficient solid-state blue laser that exploits a strong emission line provided by a solid-state laser medium of neodymium-doped scandium oxide (Nd:Sc 2 O 3 ) to produce a beam of coherent...
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5210765 |
Laser microscopy
A laser system generates a beam consisting of light of two wavelengths, one of which is in the visible spectrum. The light of the other wavelength is ultraviolet and is generated from the visible...
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5208827 |
Semiconductor laser device having a transparent waveguide and a large second harmonic generation output
A semiconductor laser device comprises a semiconductor laser which oscillates a fundamental wave, and a transparent waveguide which is installed substantially in parallel to a direction of a cavity...
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5206868 |
Resonant nonlinear laser beam converter
Multiple step nonlinear conversion apparatus for optical frequencies which make use of resonant enhancement to increase net conversion efficiency. In one embodiment, two nonlinear converters are...
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5202891 |
Nonlinear optical material
Nonlinear optical materials having the general formula Ca 1 .40-X M X V 0 .98±0.05 O 4 .00±0.08 wherein X is 0.07 to 0.43 and M is selected from the group consisting of Bi, La, Ce, Y, Pm, Pr,...
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5198837 |
Laser beam harmonics generator and light exposing device
A laser beam harmonics generator comprises a laser beam source for emitting a laser beam, a harmonics generator for generating harmonics of the laser beam in response to the irradiation of the...
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5197073 |
Solid-state laser in which the two polarization modes of the fundamental wave laser beam oscillate in a single longitudinal mode
A solid state laser apparatus in which a fundamental laser beam generated in a laser medium is resonated so as to pass a nonlinear optical crystal element provided within a resonator to thereby...
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5197072 |
Optical wavelength converting device, and laser diode pumped solid laser
An optical wavelength converting device comprises an optical waveguide device. The optical waveguide device is provided with a waveguide, which is constituted of a solid laser medium doped with a...
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5191591 |
Laser wavelength converter
A stable wavelength converting apparatus comprising an axicon having a convex conical surface on that side where a second harmonics enters and a concave conical surface on the light-leaving side....
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5191588 |
High efficiency, harmonic wavelength laser system
A linear cavity laser system having a yttrium-aluminum-garnet laser rod for producing a fundamental wavelength of radiation having a front face and a longitudinal axis, a first mirror reflective of...
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5185752 |
Coupling arrangements for frequency-doubled diode lasers
Arrangements for efficiently coupling light between a laser diode and a second-harmonic generator which feature external resonant cavities that include a feedback grating fabricated on the...
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5181212 |
Method of emitting on a specific wavelength Fraunhofer line using a neodymium doped laser transmitter
A method of emitting on a specific wavelength Fraunhofer line of peak seawater transmission and minimum solar radiation is disclosed. This method includes the steps of emitting at least on a...
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5181214 |
Temperature stable solid-state laser package
A laser-diode or laser diode array end-pumped solid-state laser package for optical communications and the like mounted on a common thermally conductive, low thermal expansion base that is...
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5179562 |
Frequency doubled ultraviolet laser
A frequency doubled ultraviolet laser comprising means for enabling a beam of coherent electromagnetic radiation to be propagated along an intracavity path, means for holding and translating an...
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5179566 |
Light-generating device and method of fabricating same
A quite small device producing blue light with small loss of light. The device has a laminated laser light-emitting portion and an optical waveguide for second-harmonic generation. Both...
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5177751 |
Laser apparatus
Disclosed is a laser apparatus having an optical pumping source, first and second resonator mirrors, a laser medium provided on a light route between the first and second resonator mirrors, an...
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5177752 |
Optical pulse generator using gain-switched semiconductor laser
Ultrashort optical pulses of a high peak output are generated by gain-switching of a semiconductor laser possessing a current non-injection region with short current pulses. By coupling this...
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5173910 |
Solid laser with an emission wavelength of 0.5-0.65 micrometers
The invention relates to a solid laser with an emission wavelength lying between 0.5 and 0.65 μm. A chromium-doped Mg 2 SiO 4 (forsterite) laser rod is pumped by a laser diode emitting between...
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5168503 |
Harmonic generator
A drive current is modulated by a current modulator, and the modulated drive current is supplied to a laser beam generator so that the laser beam emitted by the laser beam generator is varied in...
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5164947 |
Single-frequency, frequency doubled laser
A laser is disclosed comprising: a source of optical pumping radiation; a lasant rod; an input mirror; two quarter-wave plates; polarizing means, adjacent to a quarter-wave plate, for polarizing...
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5163060 |
Second harmonic generator comprising an NLO-active polymer derived from monocarbamate diols
This invention provides synthetic routes for novel single isomers of monocarbamate diols and their polymerization to provide novel polyesters, polyurethanes, polycarbonates, and the like having...
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5151909 |
Frequency doubled solid state laser having programmable pump power modes and method for controllable lasers
A laser system using non-linear crystals for second harmonic generation and solid state gain media is operated under data processor control so that a plurality of pump power modes are available....
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5151817 |
Optical frequency second harmonic generator
Applicants have discovered photo-induced second harmonic generation in rare earth doped glass bodies free of germanium. Moreover, applicants have discovered that multivalent rate-earth doped glass...
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5150252 |
Harmonics generation element
A harmonics generation element which comprises a nonlinear optical element having single-crystals of lithium niobate containing magnesium of less than 5 atomic per cent. The nonlinear optical...
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5150376 |
Laser source
A laser source with small output fluctuations due to variations in ambient temperature. The frequency doubler, which has an optical waveguide formed on the substrate of its nonlinear optical...
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5144630 |
Multiwavelength solid state laser using frequency conversion techniques
A process and apparatus are disclosed for producing multiwavelength coherent radiations ranging from deep-ultraviolet to mid-infrared. The basic laser is a pulsed Nd:YAG or Nd:YLF laser which is...
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5144629 |
Method and apparatus for laser tuning
This invention relates to a method and apparatus for tuning a laser amplifier, which amplifier utilizes a laser medium capable of lasing over a selected broad wavelength band. The lasing medium is...
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5142542 |
Signal-resonant intracavity optical frequency mixing
Disclosed is a method for generaing coherent optical radiation by intracavity optical mixing in a cavity that is resonant for the radiation generated by the lasing of a lasant material and an input...
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5136597 |
Poynting vector walk-off compensation in type II phasematching
An improved geometry is disclosed for enhancing the efficiency of second harmonic conversion in a Type II phasematching material. In this approach, the effects of wave vector double refraction are...
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5134622 |
Diode-pumped optical parametric oscillator
The present invention is an optical parametric oscillator (OPO) which combines a singly resonant oscillator (SRO) configuration with a buildup cavity and uses optical output of a buildup cavity as...
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5130997 |
Medical laser apparatus, high powered red laser used in same, and laser resonator with non-linear output
A laser system generates suitable laser power for use in photodynamic therapy, and particularly photodynamic therapy using dyes which undergo desired photodynamic reactions at 659 mm, i.e.,...
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5128948 |
Laser device with monolithically integrated frequency changer
Disclosed is a solid state rod laser, monolithically integrated with a generator of optic frequencoes different from the emission frequency of the laser. The laser diode pumped solid state laser...
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5123022 |
Frequency mixing crystal
In a laser system for converting infrared laser light waves to visible light comprising a source of infrared laser light waves and means of harmoic generation associated therewith for production of...
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5123026 |
Frequency-doubled, diode-pumped ytterbium laser
A ytterbium-doped solid state laser including a resonant cavity formed by an input mirror and an output mirror; and a gain medium within the resonant cavity, the gain medium being made of a...
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5121402 |
Multiple element ring laser
A multiple gain-element ring laser has the capability of being scaled to her CW or pulsed output powers. Optical pumping is accommodated in a plurality of optically interconnected single...
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5121404 |
Optically pumped solid laser
An optically pumped solid laser that uses a corner cube or rectangular prism as its solid laser medium, containing end faces through which a semiconductor pumping light beam is applied to the...
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5121250 |
Second-harmonic wave generating element
An element for generating second-harmonic waves of a short wavelength from a fundamental wave emitting from a semiconductor laser and the like. The element includes a substrate made of a...
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5119389 |
Laser device capable of a plurality of laser beams of different levels
In a solid-state laser device comprising a laser medium which is located within a plurality of resonance optical paths and which has a plurality of medium lengths forming parts of the resonance...
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5119383 |
Antiresonant nonlinear mirror for passive laser modelocking
An antiresonant nonlinear mirror to replace one mirror of a laser for passive modelocking of the laser, the antiresonant nonlinear mirror comprising: a beam splitter for coupling the mirror to a...
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5117126 |
Stacked optical parametric oscillator
A stacked OPO is disclosed wherein two or more optically nonlinear media, such as crystals, are coaxilly disposed in a single resonator. Incident radiation is coupled into the resonator, and causes...
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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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5113402 |
Solid state laser device for lithography light source and semiconductor lithography method
A non-linear optical material is used to convert a solid state laser ray of light output of a first wavelength into light of a shorter wavelength. The light output of shorter wavelength is suitable...
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5111468 |
Diode laser frequency doubling using nonlinear crystal resonator with electronic resonance locking
A semiconductor laser apparatus comprises a DC power supply coupled with an RF source which generates a low-amplitude RF current which is injected into a diode laser source. An optical beam shaping...
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5111466 |
Optical multilayer structures for harmonic laser emission
Optical multilayer structures for harmonic laser emission are disclosed. The multilayer structures are made of plurality of layers of different optically nonlinear semiconductor materials. The...
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5103453 |
Method and means for controlling the frequency and power output of a tunable diode laser
In a laser emitter-receiver system, a tunable diode laser provides a beam of coherent light having a selected frequency. An infrared detector spaced from the source detects the light transmitted...
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5097477 |
Laser diode pumped multiple rod ring laser allowing combination of multiple pump sources
A diode pumped ring laser allows for the combination of more pumping mode diation from pumping laser diodes for pumping at least one gain element which is simultaneously end pumped in two...
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5093834 |
Apparatus and method for steering a phase conjugate wave
Four-wave mixing is used to produce a steered optical phase conjugate wave. First and second pump waves are combined with a probe wave in a nonlinear medium within an optical conjugate, producing...
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5084879 |
Phase matching in harmonic laser apparatus including a MgO:LiNbO.sub.3 crystal at room temperature
In response to fundamental laser light, a LiNbO 3 crystal emits second harmonic laser light. A phase matching angle of 90 degrees is obtained at room temperature by using a LiNbO 3 crystal doped...
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5083007 |
Bonding metal electrical members with a frequency doubled pulsed laser beam
Metal electrical members bonded by coupling to at least one member a frequency doubled pulsed Nd:YAG laser comprising 533 and 1064 nm wavelengths is described. Frequency doubling is accomplished by...
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5077745 |
Mode-locked solid-state ring laser
Part of a solid-state lasing medium is made to be a mode locking section. An ultrasonic transducer being supplied with a high-frequency voltage generates an ultrasonic wave to propagate through the...
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