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5956354 |
Dual media laser with mode locking
In a two laser media, Nd:phosphate glass and Nd:YLF are combined into a single laser. Generally, one broad band inhomogeneously broadened material and one narrow band homogeneously broadened...
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5956356 |
Monitoring wavelength of laser devices
The invention is a circuit for monitoring the wavelength of a laser device such as a semiconductor laser. A piezoelectric resonator is positioned in the path of the light beam so as to form a...
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5953359 |
Laser diode array and fabrication method thereof
First to n-th single-axial-mode LDs are arranged on a semiconductor substrate, where n≥2. Each of the first to n-th LDs has a stripe-shaped semiconductor active layer formed on or over the...
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5949802 |
High efficiency intracavity doubled laser and method
An intracavity doubled single longitudinal mode laser is disclosed which provides stable (i.e., low amplitude variation in its output beam intensity), efficient operation. An associated method is...
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5946331 |
Integrated multi-wavelength transmitter
An integrated multi-wavelength transmitter, particularly useful in a wavelength-division multiplexed optical communications system. An arrayed waveguide grating has feedback channels between two...
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5943352 |
External cavity laser with optically switched tuning mechanism
A stable switched multifrequency source is described. The stable switched multifrequency source includes a narrowband reflective optical filter bank. This bank includes a plurality of narrowband...
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5940418 |
Solid-state laser system for ultra-violet micro-lithography
A solid state laser systems for generating highly monochromatic laser radiation at wavelengths of interest for advanced micro-lithography, particularly 248 nanometer and 193 nanometer wavelengths....
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5920588 |
Method and device for generation of phase conjugate light and wavelength conversion, and system having the device
Methods and devices for generation of phase conjugate light and wavelength conversion, and systems each having the device. In a basic structure of the present invention, a signal light beam is...
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5916788 |
Genetic recombination laser apparatus and genetic recombination method using the apparatus
A genetic recombination laser apparatus includes an optical system having a semiconductor laser medium for generating a semiconductor laser light, an Nd:YAG crystal, an LBO and β-BBOs for reducing...
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5917844 |
Apparatus for generating orthogonally polarized beams having different frequencies
Electro-optical devices for transforming a single-frequency, linearly polarized input beam from a light source introduced into a multifaceted anisotropic acousto-optical crystal into an output beam...
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5917843 |
Laser cavity assembly
A laser cavity assembly includes means (12, 13, 14; 14", 56, 57) defining respective optical resonance cavities (20, 22) for stimulated radiation of different wavelengths, which cavities include at...
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5910963 |
Laser resonator design with improved signal-to-noise level (S/N) at the output of a single-mode fiber-coupled multi-wavelength laser providing illumination for a laser scanning microscope
A single-mode fiber-coupled multi-wavelength laser, wherein, for suppressing higher order transverse modes of the laser cavity than TEM oo of at least one laser emission wavelength or for...
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5910962 |
Multiwavelength fiber laser sources for fiberoptic networks
The present invention provides for multiple wavelength laser sources. The laser source has a pumping laser generating output at a wavelength, typically below 1500 nm, and a plurality of DBR fiber...
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5905748 |
Single mode laser and method suitable for use in frequency multiplied
A single mode laser implementation and associated method are disclosed. The laser may accommodate a frequency multiplying material to provide an intracavity doubled single frequency laser. The...
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5898722 |
Dual wavelength monolithically integrated vertical cavity surface emitting lasers and method of fabrication
Dual wavelength monolithically integrated VCSELs and a method of fabrication for emitting a short wavelength light and a long wavelength light including a first mirror stack lattice matched to the...
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5894489 |
Solid-state laser system for color picture projection
A laser system generates read, green and blue beams from a single laser beam generated by an IR continuous-wave laser using rare-earth or transition elements. Semiconductor diodes are used to...
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5881079 |
Wavelength selectable laser with inherent and single-mode stability
A single-mode stabilized laser comprises a laser cavity having a round trip time τ r and a linewidth enhancement parameter α; and a frequency routing device formed in the laser cavity comprising...
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5862163 |
Apparatus for generating ultraviolet laser radiation
An apparatus for generating ultraviolet laser radiation according to the present invention includes a laser light source and a frequency conversion device made of a nonlinear optical crystal on...
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5856996 |
Compact efficient solid state laser
The invention provides a compactly built solid state laser, which can be pumped by high power semiconductor laser diodes and uses two or more laser crystals as the laser gain or amplification...
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5848085 |
Semiconductor quantum well structure and semiconductor device using the same
A semiconductor quantum well structure having at least two quantum wells, each having an electron quantum level, a heavy hole quantum level and a light hole quantum level. In the two quantum wells,...
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5844926 |
Lasers
A laser has an optical laser cavity one end of which is constituted by a partial reflector formed in optical waveguide by an unbalanced Michelson interferometer comprising an optical waveguide...
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5841801 |
Double wavelength laser
In order to make an attempt to reduce the size of the laser and to simplify the structure, in a double wavelength laser of the invention, when an optical path switching mirror 3 is located at a...
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5838709 |
Ultraviolet laser source
An ultraviolet laser source which can stably emits ultraviolet light having a sufficient output and low coherence, as a light source for an exposure unit, for a long period of time, is compact, and...
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5835517 |
WDM multiplexer-demultiplexer using Fabry-Perot filter array
A compact WDM optical device can demultiplex an optical laser signal containing several different wavelengths corresponding to particular channels, and, in reverse operation operate as a...
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5835512 |
Wavelength selecting method in wavelength tunable laser and wavelength selectable laser oscillator in wavelength tunable laser
An object of the present invention is to electrically tune and control an oscillating wavelength of a laser at high rate having a good reproducibility without providing any mechanically movable...
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5832011 |
Laser
A laser having two feedback elements at least one which is wavelength selective, is provided with a demountable optical connector located between the gain medium of the laser and the wavelength...
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5805623 |
Solid-state dye laser utilizing multiple dyes in single host
A solid-state dye laser and technique for achieving multiple output wavelength laser emission from a single solid-state dye laser media containing multiple dyes without tuning elements. When the...
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5805622 |
Apparatus for the generation of laser pulses in the US-time range
Disclosed is an apparatus for generating laser pulses, which has a Q-switched solid state laser and at least one nonlinear crystal, and the application of this apparatus for removing material in...
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5802086 |
Single cavity solid state laser with intracavity optical frequency mixing
A composite cavity continuous wave (cw) microlaser that lases at two fundamental wavelengths, denoted by λ 1 and λ 2 , which are frequency-mixed in a suitable nonlinear crystal oriented within...
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5796764 |
Rare-earth doped lithium niobate DBR laser
A rare-earth doped, lithium niobate, diffusion Bragg reflector laser having a simplified structure and improved efficiency is disclosed. The laser has a pump source, a wavelength division...
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5787102 |
Light generating device and method using a periodically structured non-linear material and orthogonal optical interaction
A non-linear optical device in which quasi-phase matching between different optical waves of differing polarizations and refractive indices increases the interaction length between the waves. The...
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5781334 |
Stabilized multi-frequency light source and method of generating synthetic light wavelengths
The invention concerns the generation of synthetic light wavelengths in which light from a first light source (D 1 ) is coupled into a common light path section (L G1 ) and its average frequency...
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5768302 |
Multi quasi phase matched interactions in a non-linear crystal and method using same
A laser system in which an intense laser beam of a predefined pumping wavelength traverses a non-linear material, such as crystalline lithium niobate, that has been impressed with one or more quasi...
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5767995 |
System and methods for assessing the suitability of analog lasers for broadband access applications
A system and method for predicting the ratio of the strength of the carrier signal to the strength of nonlinear distortion (C/NLD) generated by a communications laser is disclosed. The method...
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5764678 |
Wavelength-stabilized narrow band excimer laser
The present invention provides a wavelength-stabilized narrow band excimer laser device which has a discharge tube, a cavity formed of both an output mirror at a front side and a total reflection...
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5751758 |
Phase conjugate wave generating device, wavelength converting method, optical dispersion compensating method and multi-wavelength light generating device
There is provided a device comprising a distributed feedback semicon-ductor laser having λ/4 phase shift diffraction grating and antireflection films coated on a light input end and a light output...
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5741595 |
Ultraviolet optical part having coat of ultraviolet optical thin film, and wavelength-changing device and ultraviolet light source unit having coat of ultraviolet optical thin film
The present invention provides an ultraviolet optical part having an ultraviolet optical thin film having a high durability against ultraviolet rays. The ultraviolet optical part is used in...
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5742626 |
Ultraviolet solid state laser, method of using same and laser surgery apparatus
A solid state laser system producing coherent radiations at deep ultraviolet wavelengths includes a solid state laser producing a first beam having a wavelength near 1 micron. The 1 micron beam is...
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5740190 |
Three-color coherent light system
A three-color coherent light system includes a laser source for generating a laser beam in the 1000-1100 nm wavelength region; means, responsive to the laser source, for generating the second...
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5737347 |
Laser with multiple gain elements
A tunable laser produces laser emission at at least two wavelengths simuleously. The tunable laser includes at least two gain elements, where each gain element generates a different wavelength....
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5734669 |
1.3 μm lasers using Nd.sup.3+ doped apatite crystals
Laser pumping and flashlamp pumping of apatite crystals such as trivalent neodymium-doped strontium fluorapatite (Sr 5 (PO 4 ) 3 F) emits efficient lasing at both 1.059 and 1.328 μm. The pump...
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5708672 |
Dual wavelength solid state laser
A dual wavelength continuous wave (cw) solid state microlaser device that provides simultaneous laser action at a first and a second wavelength. The laser comprises a solid state gain material...
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5708674 |
Semiconductor laser or array formed by layer intermixing
A fabrication process and several structures for an index-guided laser diode formed by IILD or for a multiple wavelength laser array containing stacked semi-conductive active layers with quantum...
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5703896 |
Silicon quantum dot laser
Dynamic variation in the color produced by a silicon quantum dot laser is achieved by utilizing segmented sections or patches of quantum dots of differing sizes to produce different colors of...
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5675595 |
Composite multiple wavelength laser material and multiple wavelength laser for use therewith
A composite multiple wavelength laser material is provided and is typically constructed with a common axis of construction in the form of a rod of uniform cross-section. The rod comprises a...
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5661737 |
Multi-wavelength laser beam detector with refractive element
A detector system for providing a plurality of output beams for monitoring the output beam of a laser system. The detector system includes a refractive element having a pair of opposing...
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5642371 |
Optical transmission apparatus
An optical transmission apparatus characterized by comprising a transmission system for transmitting an optical frequency-division multiplex signal, and an optical reception system which contains a...
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5638393 |
Nonmonolithic multiple laser source arrays
An array of laser diodes produces laser beams having an orthogonal polarization and/or a different wavelength. A plurality of aligned, monolithic laser beam dies are mounted on a base so that the...
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5636238 |
Device for producing laser radiation at a variable or selectable wavelength
A device permitting a single primary laser producing a collimated beam at a given wavelength, to be used for different purposes by converting the collimated beam to a beam of different wavelength....
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5594747 |
Dual-wavelength pumped low noise fiber laser
A dual wavelength pumped low noise fiber laser includes a fiber laser 10 comprising a pair of Bragg gratings 14,16 at opposite ends of a fiber laser cavity 18 which is co-doped with two rare-earth...
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