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8179933 |
Systems and methods for visible light source evaluation
Particular embodiments of the present disclosure relate systems and methods for evaluating visible light sources. According to one embodiment, a method of evaluating a visible light source...
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8175126 |
Arbitrary optical waveform generation utilizing optical phase-locked loops
This invention relates to opto-electronic systems using semiconductor lasers driven by optical phase-locked loops that control the laser's optical phase and frequency. Feedback control provides a...
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8160114 |
Single longitudinal mode laser diode
A single-mode, etched facet distributed Bragg reflector laser includes an AlGaInAs/InP laser cavity, a front mirror stack with multiple Fabry-Perot elements, a rear DBR reflector, and a rear...
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8130802 |
Tunable laser
A tunable laser includes an optical gain medium, a first resonator, a periodically tunable optical filter, and a second resonator in which light of a laser wavelength exhibits a round trip time T....
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8126025 |
Laser light source apparatus, and monitoring apparatus and image display apparatus using the same
A laser light source apparatus includes a first laser array light source that emits first-wavelength light, and a second laser array light source that emits second-wavelength light, the second...
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8081670 |
System and method for providing chirped electromagnetic radiation
A system and method for controllably chirping electromagnetic radiation from a radiation source includes an optical cavity arrangement. The optical cavity arrangement enables electromagnetic...
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8045593 |
Method of controlling a frequency-converted laser source comprising an external optical feedback component
A method of controlling a frequency-converted laser source is provided where the laser source comprises a laser cavity, an external optical feedback component, a wavelength selective component, and...
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8009707 |
Dual mode single cavity pulse compressor
An rf pulse compressor has a single high Q cavity resonator fed by a four port hybrid coupler which is connected to the resonator at coupling ports located at the intersection of two of the...
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8000359 |
Laser device and controlling method therefor
A laser device capable of preventing deterioration of a light signal and a controlling method therefor are provided. A wavelength tunable laser module provided with a resonator including the...
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7995627 |
Process and apparatus for a wavelength tuning source
An apparatus and source arrangement for filtering an electromagnetic radiation can be provided which may include at least one spectral separating arrangement configured to physically separate one...
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7972034 |
Laser light source, laser light source unit, illumination device, monitor apparatus, and image display apparatus
A laser light source includes: a laser array in which plural emitters are arranged; and a submount having first and second surfaces facing in opposite directions. The laser array is provided on the...
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7974321 |
Method and arrangement for stabilizing the average emitted radiation output of a pulsed radiation source
The invention is directed to a method and an arrangement for stabilizing the average emitted radiation output of a pulsed radiation source. It is the object of the invention to find a novel...
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7953131 |
Frequency synthesizer and frequency synthesizing method using optical injection locking
The present invention relates to an optical frequency synthesizer and an optical frequency synthesizing method using femtosecond laser optical injection locking, which inject a femtosecond laser...
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7949019 |
Wavelength tuning source based on a rotatable reflector
An apparatus and source arrangement for filtering an electromagnetic radiation can be provided which may include at least one spectral separating arrangement configured to physically separate one...
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7922336 |
Light source device for display device, display device, and method for adjusting image of display device
A light source device for a display device for projecting an image on a screen is provided, the light source device for display device including a light source unit operable to output light; an...
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7891818 |
System and method for aligning RGB light in a single modulator projector
A projection system that includes a singe light modulation device and a plurality of light sources of different wavelengths. Each wavelength of light is incident on the light modulation device at a...
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7881566 |
Optical pulse generator for distributed temperature sensing operating at a characteristic wavelength in a range between 1050 nm and 1090 nm
An improved laser source for use in a distributed temperature sensing (DTS) system (and DTS systems employing the same) includes a laser device and drive circuitry that cooperate to emit an optical...
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7869472 |
Optical locking based on optical resonators with high quality factors
Techniques and devices for providing optical locking of optical resonators and lasers.
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7869473 |
Directly modulated laser with isolated modulated gain electrode for improved frequency modulation
A DBR laser, such as a semiconductor DBR laser is disclosed having improved frequency modulation performance. The laser includes a split gain electrode and a tuning electrode. A modulating current...
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7864822 |
Process and apparatus for a wavelength tuning source
An apparatus and source arrangement for filtering an electromagnetic radiation can be provided which may include at least one spectral separating arrangement configured to physically separate one...
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7853155 |
Method for adjusting bias in optical transmitter with external modulator
A method for operating an optical transmitter for transmission of an optical signal over a dispersive fiber optic media to a remote receiver. The method includes the steps of providing a respective...
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7835411 |
Laser frequency stabilizing device, method and program
A laser frequency stabilizing device comprises a laser light producer operative to produce and emit a laser light containing a first and a second longitudinal mode light having different...
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7804863 |
Laser system
The invention concerns a laser system with a frequency comb generator for generating a comb of optical frequencies having an offset frequency and a plurality of equidistant modes. The laser system...
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7778293 |
Determining and setting the frequency modulation index of a laser in a CPT frequency standard
A technique for determining the modulation index of a frequency-modulated laser source from the absorption spectrum that is produced when light from the laser passes through an alkali metal vapor...
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7778548 |
Optical communication system, lighting equipment and terminal equipment used therein
A communication system has lighting equipment that has transmitter comprising multiple light-emitting elements that each emit light of different wavelengths and terminal equipment that has...
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7729044 |
Method and devices for generating stable and tunable light pulses
Methods and devices for generating stable, tunable and intense output light pulses are provided. A primary beam of light pulses is used to form a filament in an interaction zone. A secondary bean...
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7724786 |
Process and apparatus for a wavelength tuning source
An apparatus and source arrangement for filtering an electromagnetic radiation can be provided which may include at least one spectral separating arrangement configured to physically separate one...
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7720115 |
Dual mode single cavity pulse compressor and method
An rf pulse compressor has a single high Q cavity resonator fed by a four port hybrid coupler which is connected to the resonator at coupling ports located at the intersection of two of the...
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7715453 |
Wavelength control in phase region of semiconductor lasers
Particular embodiments of the present invention relate generally to semiconductor lasers and laser scanning systems and, more particularly, to schemes for controlling semiconductor lasers....
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7711019 |
Variable wavelength light source
A gain element and a variable wavelength reflector form a resonator. A wavelength selective element selects a resonance wavelength in the resonator. A beam splitter is provided for monitoring an...
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7697578 |
Wavelength variable laser
The present invention provides a directly modulatable wavelength variable laser that enables long distance and large volume communication with a simple and compact configuration. The wavelength...
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7649915 |
Pulsed laser sources
Various embodiments include modelocked fiber laser resonators that may be coupled with optical amplifiers. An isolator may separate the laser resonator from the amplifier, although certain...
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7639910 |
Optical module and method of packaging the same
An optical module is configured with a combination of a single-mode oscillating light source and an optical filter. In this optical module, the single-mode oscillating light source outputs a...
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7633977 |
Multispectral laser with improved time division multiplexing
A laser provides a cavity with complementary wavelength-dependent delay elements to provide the same optical length but time-staggered light paths for different colors. This provides the ability to...
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7626758 |
Method and apparatus for controlling and protecting pulsed high power fiber amplifier systems
An electronic circuit for controlling a laser system consisting of a pulse source and high power fiber amplifier is disclosed. The circuit is used to control the gain of the high power fiber...
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7623556 |
Device for multiplying optical frequencies
An optical cavity is combined with non-linear optical crystals and a laser source to generate light radiation at a frequency about 1.5 times the frequency of the initial laser source while having a...
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7586960 |
Forced wavelength chirping in semiconductor lasers
Methods of controlling semiconductor lasers are provided where, the time-averaged optical spectrum of the semiconductor laser is broadened by modulating the drive current at a relatively high...
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7580183 |
Light generator, optical amplifier, and optical communication system
In an optical amplifier according to the present invention, a change signal from a change signal source is fed into a light source or a drive circuit. The wavelength of light outputted from the...
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7545838 |
Incoherent combination of laser beams
A method of combining beams from a plurality of laser resonators includes frequency modulating the output of each of the lasers with one or more of the lasers frequency modulated out-of-phase with...
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7542490 |
Reduction of surface heating effects in nonlinear crystals for high power frequency conversion of laser light
A device for generating a frequency converted laser beam includes a nonlinear crystal having a first end face and a second end face opposed to the first end face. The nonlinear crystal is...
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7529280 |
Tunable laser apparatus and methods
A tunable laser has a first optical element spaced apart from a second optical element to form a laser cavity of fixed length there between. An optical gain medium is in at least part of the laser...
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7508849 |
Wavelength tunable laser device
A semiconductor optical amplifier, an acousto-optic tunable filter, a phase shifter, a lens, and an internal etalon are arranged in a resonator. Outside the resonator, two lenses, two beam...
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7477667 |
Practical approach for one mJ femtosecond fiber laser
A fiber Chirped Pulse Amplification (CPA) laser system includes a fiber mode-locking oscillator for generating a laser and stretching into a few hundreds ps-10 ns pulse by a fiber stretcher for...
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7436864 |
Method for optimising the calibration process of a tuneable laser
A method relating to the calibration of tuneable lasers is described. The method provides for the provision of correct control currents so as to achieve each of desired output frequencies from the...
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7418205 |
Method and apparatus for controlling a frequency hopping laser
An optical spread spectrum communication system includes a tunable laser which sequentially outputs optical signals having different wavelengths. The laser produces a frequency spectrum having a...
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7414779 |
Mode locking methods and apparatus
In one aspect the invention relates to a frequency varying wave generator. The generator includes a gain element adapted to amplify a wave having a wavelength; a time varying tunable wavelength...
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7389045 |
Apparatus and method for monitoring and compensating an optical signal
Optical communication apparatuses and optical communication methods are provided. According to one aspect, an optical communication apparatus includes a communication path configured to communicate...
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7389053 |
Tunable filtering of RF or microwave signals based on optical filtering in Mach-Zehnder configuration
Devices and techniques for achieving signal filtering in RF or microwave frequencies by optical filtering using two separate optical paths. Each optical path may include one or more optical...
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7379672 |
Photonic RF distribution system
The present photonic RF generation and distribution system provides a system and method for distributing an RF output signal. The photonic RF distribution system includes two optical sources for...
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7362783 |
Optical frequency mixing
A method of generating coherent radiation, wherein a first fundamental beam of radiation from a four level laser and a second fundamental beam of radiation from a three level laser are mixed in a...
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