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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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7620080 |
Laser pulse conditioning
A light pulse conditioning apparatus has at least first and second curved reflective surfaces that share a common focus and a light-redirecting element disposed between the first and second curved...
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7616669 |
High energy pulse suppression method
A laser processes a workpiece with laser pulses delivered at random time intervals and at substantially constant energy levels by characterizing the laser cavity discharge behavior and utilizing...
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7613214 |
Multi-wavelength mode locked laser
A mode-locked laser employs a light-wavelength-dependent, path-length adjuster to provide different path-lengths for multiple light frequencies and dual modulation frequencies selecting multiple...
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7609746 |
Light source device, image display device, projector, illumination device, and monitor device
A light source device generates irradiation light that is irradiated onto a predetermined face, the light source device including: a laser light source that emits laser light; a diffractive optical...
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7596156 |
Laser
A method of stabilising a laser in order to maintain the laser in SLM operation is disclosed. The resonator cavity of the laser is modulated by a modulation signal applied to a piezo-electric...
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7593445 |
Semiconductor optical device and optical transmission module
A semiconductor optical device has a semiconductor laser portion and a modulator portion which have different mesa structures. The mesa structure of the semiconductor laser portion is a ridge...
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7583710 |
Laser and environmental monitoring system
A laser and monitoring system is provided. In another aspect of the present invention, the system includes a laser, pulse shaper and detection device. A further aspect of the present invention...
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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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7570845 |
Deployment of electro-optic amplitude varying elements (AVEs) and electro-optic multi-functional elements (MFEs) in photonic integrated circuits (PICs)
Electro-optic amplitude varying elements (AVEs) or electro-optic multi-function elements (MFEs) are integrated into signal channels of photonic integrated circuits (PICs) or at the output of such...
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7570680 |
Laser diode driver with multiple modulation current source
The present invention is to provide an LD-driver that enables to adjust the waveform of the driving current to the LD even the driver is constituted with a current controlled device such as bipolar...
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7567596 |
Control system and apparatus for use with ultra-fast laser
A control system and apparatus for use with an ultra-fast laser is provided. In another aspect of the present invention, the apparatus includes a laser, pulse shaper, detection device and control...
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7560716 |
Free electron oscillator
A beam of charged particles (e.g., an electron beam) from a charged particle source can be selectively applied to a pair of electrodes. For example, the charged particles can be electrons that are...
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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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7542503 |
Distributed feedback laser with improved optical field uniformity and mode stability
A directly modulated distributed feedback (DFB) laser with improved optical field uniformity and mode stability may include a laser cavity and a distributed reflector and/or external reflectors....
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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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7519246 |
Photonic integrated circuit (PIC) chips
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other...
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7515624 |
Semiconductor laser, semiconductor laser driver and method of driving semiconductor laser reducing feedback-induced noise by modulated optical output
A semiconductor laser device has an active layer which is divided into two regions in the direction of a resonator, i.e., a light-amplifying region and a saturable absorber region. The...
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7512295 |
Transmitter photonic integrated circuits (TXPICS) with directly modulated lasers and wavelength selective combiners
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other...
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7508852 |
Passive mode-locked semiconductor laser diode, and optical clock signal extracting device
To provide an optical clock signal extracting device with a simple configuration, by which an optical clock signal may be extracted without depending on the polarization direction of an input...
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7508850 |
Apparatus for modifying CO2 slab laser pulses
The quality of pulses output from laser systems such as super-pulsed CO 2 slab lasers can be improved using half-wavelength electro-optic modulators (EOMs), in combination with thin film...
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7505488 |
Synthetic aperture ladar with chirped modelocked waveform
The present invention uses an intra-cavity modulation approach to modulate a laser transmitter at bandwidths greater than a few gigahertz (GHz) in a non-ambiguous waveform by chirping the laser and...
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7502391 |
Eye safe high power fibre laser
Apparatus for providing optical radiation includes a pump source and at least one first amplifying waveguide. The first amplifying waveguide emits optical radiation in excess of 1400 nm when pumped...
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7502394 |
System and method for modulating a semiconductor laser
Both a system and method are provided for modulating the intensity of an output beam generated by semiconductor laser. The exemplary system includes a source of pulsating current connected to the...
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7502567 |
Electroabsorption-modulated Fabry-Perot laser and methods of making the same
Electroabsorption-modulated Fabry-Perot lasers and methods of making the same are described. In one aspect, a light source includes a Fabry-Perot (FP) laser that is operable to generate multimode...
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7492795 |
Ultralow noise mode-locked laser and RF sinewave source
Systems, devices and methods of generating both a precision electrical timing signal as well as a precision optical timing signal. A novel, modified opto-electronic loop oscillator is used to drive...
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7489838 |
Optical transmitter
An optical transmitter comprises an array of modulated sources having different operating wavelengths approximating a standardized wavelength grid and providing signal outputs of different...
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7489715 |
Optimization of mode selection in a laser resonator
The so-called single-longitudinal mode of operation of a tunable laser beam source requires active control of the band-pass filters mounted in the laser resonator. As a rule, this entails one, or a...
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7486707 |
Optical delay module for lenghtening the propagation path of a light beam and pulse multiplication or elongation module
The invention relates to an optical delay module for lengthening the propagation path of a light beam comprises a first spherical mirror and a second spherical mirror, the first spherical mirror...
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7477807 |
Monolithic transmitter photonic integrated circuit (TxPIC) semiconductor chip
A photonic integrated circuit (PIC) chip comprising an array of modulated sources, each providing a modulated signal output at a channel wavelength different from the channel wavelength of other...
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7460571 |
Laser control apparatus and control method thereof
A laser control apparatus and control method thereof includes multiple laser elements, a photodetector for monitoring optical outputs of the laser elements, a modulation. circuit for modulating...
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7457329 |
Method and system for a high power low-coherence pulsed light source
A high power pulsed optical source includes a multi-port optical circulator and a seed source coupled to a first port of the multi-port optical circulator. The seed source is adapted to provide...
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7450618 |
Laser system using ultrashort laser pulses
A laser system using ultrashort laser pulses is provided. In another aspect of the present invention, the system includes a laser, pulse shaper and detection device. A further aspect of the present...
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7447246 |
Q-modulated semiconductor laser
A Q-modulated semiconductor laser comprises an optical gain section and an electro-absorptive modulator section, separated by a vertically etched air gap acting as a partially reflecting mirror....
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7443893 |
Method and system for tunable pulsed laser source
A tunable pulsed laser source comprising a seed source adapted to generate a seed signal and an optical circulator. The optical circulator includes a first port coupled to the seed source, a second...
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7436871 |
Method and device for performing wavelength modulation with Distributed Bragg Reflector (DBR) laser
The present invention is directed to a method and system for providing phase modulated current to a semiconductor laser to control beam wavelength. A first current is received into a gain portion...
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7436867 |
Hermetically sealed external cavity laser system and method
A laser apparatus in a hermetically sealed container and methods for hermetically sealing the laser. The laser apparatus comprising an external cavity laser and a modulator in a single hermetically...
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7433375 |
Laser trim and compensation methodology for passively aligning optical transmitter
A method embodiment of the invention includes a scheme for trimming and compensation of a laser emitter in a fiber optic link. A laser emitter is provided. Also a reference optical power value is...
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7430229 |
Opto-electronic device comprising an integrated laser and an integrated modulator and associated method of production
The field of the invention is that of integrated optical emission devices comprising a laser emission section and a section for modulating the optical power emitted by the laser, also known as ILM...
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7428253 |
Method and system for a pulsed laser source emitting shaped optical waveforms
A tunable pulsed laser source includes a seed source adapted to generate a seed signal and an optical circulator having a first port coupled to the seed source, a second port, and a third port. The...
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7425706 |
Gamma-ray laser; induced gamma emission system and method
A method for producing stimulated emission of gamma radiation comprising:
1] providing at least first and second gamma-radiation sources, both sources being in recoil-free first-excited...
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7418015 |
System and method for control of optical transmitter
A system and method for controlling an optical transmitter. Proximate to startup of the optical transmitter, the laser bias to the optical transmitter is increased from a minimum to a setpoint...
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7400659 |
Method and device for performing DBR laser wavelength modulation free of thermal effect
The present invention is directed to a method and system for providing a three-level current scheme to a semiconductor laser to control beam wavelength and laser temperature. A first current is...
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7391797 |
Integrated circuit for controlling a laser diode
The invention relates to an integrated circuit for controlling a laser diode, comprising a signal input for receiving a data signal; a signal output for connection to the laser diode; a modulator...
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7379486 |
Technique for optically pumping alkali-metal atoms using CPT resonances
Systems and methods for optically pumping alkali-metal atoms using Coherence Population Trapping (CPT) resonances are disclosed. An illustrative push-pull optical pumping system for inducing CPT...
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7376161 |
Modulation light source, image display apparatus including the same, and method of driving modulation light source
A modulation light source capable of maintaining thermal stability of a gain part is provided. A modulation light source includes a DBR laser having a DBR part, a phase part and a gain part, a...
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7372879 |
Wavelength locker using modulator current and photodetector
The wavelength of light emitted by a laser and modulated by a frequency response modulator is determined from the power of the emitted light and the current drawn by the modulator. From the...
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7345803 |
Optical modulator and optical modulating method
In an optical modulation device ( 10 ) having an electrical/optical interaction region ( 11 ), an electrical signal line ( 3 ) is connected to an electrical signal input terminal ( 2 a ), another...
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7336686 |
Laser display apparatus
Provided is a laser display apparatus in which speckle can be suppressed. The laser display apparatus includes: a laser comprising a first mirror and a second mirror that are separated by a cavity...
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7324761 |
Single sideband optical transmitter
Described are an optical transmitter and a method for generating a single sideband optical signal. The method includes generating a data signal at a first power level and at a second power level...
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