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7630604 |
Dipole induced transparency drop-filter cavity-waveguide system
A normally opaque waveguide interacting with a drop-filter cavity can be switched to a transparent state when the drop filter is also coupled to a dipole. This dipole induced transparency may be...
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7627017 |
Laser amplifier and method of making the same
The present invention includes a laser amplifier and a method of making the same. The laser amplifier of the present invention includes a gain medium layer having a first index of refraction, and a...
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7623558 |
Optical systems for laser arrays
Surface emitting laser arrays with intra-cavity harmonic generation are coupled to an optical system that extracts harmonic light in both directions from an intra-cavity nonlinear optical material...
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7616673 |
Semiconductor laser device
A semiconductor laser device includes a semiconductor laser body including a resonator and having a front end face and a rear end face facing each other, the resonator being located between the...
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7609742 |
Star configuration optical resonator
An optical resonator has an internal cavity with an output coupler, an end mirror, and one or more active mirror amplifiers (AMAs) that are arranged in a manner to form a laser radiation...
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7596165 |
Distributed Bragg Reflector for optoelectronic device
A Distributed Bragg Reflector (DBR) that has relatively low light absorption, relatively low electrical resistance, and/or relatively good thermal conductivity. The DBR may include a first mirror...
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7590156 |
High intensity MHz mode-locked laser
Systems, configurations and methods of using an ultrafast, self-starting, mode-locked laser are provided. The systems, devices and methods of using stable, self-starting mode-locked lasers, can be...
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7586971 |
External-cavity laser light source apparatus and laser light emission module
An external-cavity laser light source apparatus includes a plurality of laser light emission modules, each including a first mirror, a second mirror reflecting fundamental wave light toward the...
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7583719 |
Complex-coupled distributed feedback semiconductor laser
A distributed feedback semiconductor laser may have (1) a controlled complex-coupling coefficient which is not affected by grating etching depth variation, and (2) facet power asymmetry with no...
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7577177 |
Multi-path laser system
A laser chamber is provided that increases power, initiation, and discharge efficiency over single chamber lasers by providing a multi-fold laser chamber, protrusions, discharge segmentation and...
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7573924 |
Nitride semiconductor laser device
A nitride semiconductor laser device includes a nitride semiconductor laser element having a resonator end surface and capable of emitting light with a wavelength of at most 420 nm, a heat sink...
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7567608 |
Volume Bragg grating laser mirror device
A volume Bragg grating (VBG) has a narrow wavelength. The wavelength is changed by changing an angle of the VBG or a temperature of the VBG. Thus, the present invention has a narrow wavelength, a...
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7564880 |
Laser intra-cavity electronic wavelength tuner
An apparatus for adjusting the wavelength of a laser capable of lasing at multiple wavelengths by using a single acousto-optical modulator and a pair of optical reflectors inside a laser cavity. By...
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7561611 |
Extended-lifetime elements for excimer lasers
The invention is directed to elements used in high power laser lithographic systems operating at below 250 nm, and in particular to elements that have a coating of selected materials to extend...
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7551662 |
Distributed feedback (DFB) quantum dot laser structure
A distributed feedback (DFB) quantum dot semiconductor laser structure is provided. The DFB quantum dot semi-conductor laser structure includes: a first clad layer formed on a lower electrode; an...
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7548569 |
High-power optically end-pumped external-cavity semiconductor laser
A high-power optically end-pumped external-cavity semiconductor laser is provided having a laser chip including an active layer and a distributed Bragg reflector (DBR) for emitting light of a...
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7548572 |
Stabilized solid-state laser gyroscope
The field of the invention is that of solid-state laser gyros. One of the major problems inherent in this technology is that the optical cavity of this type of laser is by its nature highly...
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7539232 |
Compact phase locked laser array and related techniques
An electro-optical system includes a plurality of electromagnetic gain media having a corresponding plurality of apertures. The apertures are disposed in a predetermined spatial distribution. The...
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7535946 |
Structure using photonic crystal and surface emitting laser
A structure includes a photonic crystal layer including a first member having a high refractive index in which a plurality of holes are periodically arranged, and a second member having a low...
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7535634 |
Optical device, system, and method of generating high angular momentum beams
An optical device, optical system, and method of generating optical beams having high angular momenta are provided. The optical device includes a whispering gallery mode resonator defining a...
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7519095 |
Vertical-cavity, surface-emission type laser diode and fabrication process thereof
A vertical-cavity, surface-emission-type laser diode includes an optical cavity formed of an active region sandwiched by upper and lower reflectors, wherein the lower reflector is formed of a...
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7499207 |
Beam shaping prior to harmonic generation for increased stability of laser beam shaping post harmonic generation with integrated automatic displacement and thermal beam drift compensation
A harmonic generation/beam shaping system to generate a shaped beam having a harmonic relationship with a beam generated by a laser, including a first harmonic generation element and a second...
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7499480 |
Photonic crystal structure and surface-emitting laser using the same
A structure includes a photonic crystal layer which has a first member having a first refractive index and having a surface with a plurality of holes periodically arranged therein, and includes a...
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7486435 |
Multi-port optical parametric oscillator
An optical parametric oscillator includes a source of coherent energetic pump optical signals and an optical resonator cavity which includes a set of optical parametric amplifying (OPA) crystals...
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7483469 |
Surface-emitting type semiconductor laser and its manufacturing method, optical module, and light transmission device
To provide surface-emitting type semiconductor lasers that can emit laser light with a high power output and a narrow radiation angle, and methods for manufacturing the same. A surface-emitting...
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7440643 |
Variable light controlling device and variable light controlling method
A variable light controlling device comprising a substrate, an optical waveguide disposed on the substrate, a first heater and a second heater to change the optical waveguide's temperature is...
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7436873 |
Optical device and semiconductor laser oscillator
In an optical device, a slab layer includes an active layer sandwiched between cladding layers. The slab layer has a periodic refractive index profile structure in a two-dimensional plane, as a...
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7433381 |
InP based long wavelength VCSEL
A long wavelength vertical cavity surface emitting laser having a substrate, a first mirror situated on the substrate, an active region situated on the first mirror, a second mirror situated on the...
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7426229 |
Line narrowing module, light source of exposure apparatus comprising the same, and method of producing exposure light using line narrowing
A line narrowing module includes an elliptical mirror, a diffraction grating disposed at a first focus of the mirror for separating an incident beam into different lines, and a laser beam...
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7425726 |
Electroabsorption modulators and methods of making the same
Electro-absorption modulators and methods of making the same are described. In one aspect, an electroabsorption modulator includes first and second electrodes, first and second cladding regions, an...
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7415057 |
Unstable optical resonator and laser device
An unstable optical resonator for an optically active medium comprising a spherical back mirror and a spherical outcoupling mirror is proposed, and an outcoupling which is asymmetrical in relation...
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7406107 |
Semiconductor spectroscopy system
An optical power control system for a semiconductor source spectroscopy system controls power fluctuations in the tunable signal from the spectroscopy system and thus improves the noise performance...
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7394837 |
Traveling-wave linear cavity laser
A linear cavity design to produce a traveling wave operation as in a ring laser without the ring cavity design. All fiber configurations may be used to implement fiber lasers based on the linear...
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7394986 |
Flat top optical filtering component
The invention relates to wavelength-selective optical filters for allowing light of a narrow optical spectral band, centered around a wavelength (λ c ) to pass through them, while reflecting the...
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7382812 |
Solid state laser device
The transmittance of an etalon relative to an oscillating line having the wavelength of 1061.6 to 1062.2 nm by an Nd:YAG laser medium 3 is set to 0.9 or lower (the maximum value of the...
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7376309 |
Optical structure
An optical structure comprising an optical resonator is provided. The optical resonator comprises a first set of nested closed optical regions, forming a distributed feedback resonator structure...
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7366221 |
Laser apparatus and method of driving diffraction grating
A laser apparatus is disclosed. The laser apparatus has a diffraction grating that receives laser light from a semiconductor laser, emits first order diffracted light having a predetermined...
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7359423 |
Distributed feedback laser diode
A semiconductor laser includes an active layer on an n-type InP substrate. A diffraction grating and a p-type InP cladding layer are above the active layer. The diffraction grating has at least one...
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7352791 |
Optical systems including wavefront correcting optical surfaces
The present invention relates to optical systems, beam expanding assemblies, line narrowing modules, and lasers having refractive optical elements with wavefront correcting optical surfaces. The...
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7339974 |
Tunable semiconductor laser
A tunable semiconductor laser includes gain medium, wavelength-selective element and a laser mode matching element. The wavelength-selective element comprises a first light absorbing plate...
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7336690 |
Solid-state laser system
A simple and high-reliability constitution provides a solid-state laser system that allows a high-output, long-pulse-width laser beam to be obtained. A solid-state laser system that includes a...
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7321468 |
Method and optical arrangement for beam guiding of a light beam with beam delay
A method for beam guiding of a light beam generated by a light source to a target location along a path distance L S , comprises splitting the light beam on the path distance L S at least once...
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7317741 |
Amplified spontaneous emission ducts
Amplified spontaneous emission (ASE) ducts are disclosed for use with various gain media. An ASE duct may be configured and arranged to remove ASE from solid state or liquid gain media and transmit...
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7260136 |
Multiple laser cavity
A method of using at least a part of a cavity for a first and at least one second laser includes providing a first laser beam to the part of the cavity, splitting the first beam into a first and a...
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7254156 |
Line-narrowed dye laser
A dye-laser includes a resonator formed between two mirrors. The resonator has a longitudinal Z-axis and transverse X- and Y-axes perpendicular to each other and perpendicular to the Z-axis. A beam...
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7251260 |
Wavelength-locked fiber-coupled diode-laser bar
In apparatus for wavelength stabilizing and spectrally narrowing an output beam of a diode-laser, a cylindrical lens is arranged to collimate the beam in the fast axis of the diode laser without...
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7242698 |
Wavelength tunable laser with dispersive element
A laser being tunable in wavelength includes a first reflecting unit and a second reflecting unit, both reflecting units being arranged to at least partially reflect an incident beam of...
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7230959 |
Tunable laser with magnetically coupled filter
Laser apparatus and methods that permit actuation of a tuning element via a magnetically coupled drive assembly, and which provide for isolation of contamination-sensitive optical surfaces within a...
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7212560 |
Tunable external cavity laser diode using variable optical deflector
Provided is a tunable external cavity laser diode using a variable optical deflector wherein the variable optical deflector, in which a refractive index varies according to an electrical signal, is...
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7209508 |
Multi-channel light source and multi-channel optical module using the same
A multi-channel light source includes a semiconductor optical amplifier for generating light of a wide wavelength band and outputting the generated light through a first end and a second end. The...
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