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7564881 |
Optical transmission module with digital adjustment and the adjusting method
The invention discloses an optical transmission module with digital adjustment and method thereof. The module includes a laser ( 21 ), a laser driver ( 22 ), an automatic power adjustment circuit (...
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7558484 |
Ultra-wide band wireless system
The present invention provides a kind of ultra-wide band wireless system, which changes the previous electronic structure for ultra-wide band pulse generator, and uses light to generate pulse...
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7548570 |
Laser power control apparatus
In a laser power control apparatus for controlling a laser power of a combination drive, first laser light Lc applied onto a first optical disk and second laser light Ld applied onto a second...
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7545836 |
Apparatus and method for temporally shaping drive current to seed-signal-laser-diodes for high-powered fiber-laser amplifier systems
Apparatus and method for generating controlled-linewidth laser-seed-signals for high-powered fiber-laser amplifier systems. In some embodiments, the natural chirp (frequency change of laser light...
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7515618 |
High power laser using controlled, distributed foci juxtaposed in a stimulate Brillouin scattering phase conjugation cell
In the laser system of the present invention, an acoustic grating (AG) established in an SBS cell by an initial laser pulse is forced into oscillation from noise. Since the process is nonlinear,...
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7496120 |
Compact laser output monitoring using reflection and diffraction
Compactness is preserved while enabling beam monitoring of optical properties of an output beam by employing a combination of reflection and diffraction. An input beam is reflected, divided using...
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7483455 |
Control method and control circuit for laser diode, and optical transmitter using the same
A control method for a laser diode is conducted such that optical output and OMA (optical modulation amplitude) or extinction ratio of the laser diode are controlled while modulating the optical...
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7386017 |
Synthetic guide star generation
A system for assisting in observing a celestial object and providing synthetic guide star generation. A lasing system provides radiation at a frequency at or near 938 nm and radiation at a...
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7359412 |
Laser apparatus, laser irradiation method, and manufacturing method of semiconductor device
It is an object to provide a laser apparatus, a laser irradiating method and a manufacturing method of a semiconductor device that make laser energy more stable. To attain the object, a part of...
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7324571 |
Methods and systems for laser processing a workpiece and methods and apparatus for controlling beam quality therein
Laser processing methods, systems and apparatus having a super-modulating power supply or pumping subsystem and high beam quality (i.e., brightness) are disclosed. The methods, systems and...
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7295585 |
Method for noise cancellation by spectral flattening of laser output in a multi-line-laser instrument
An improved method of subtracting laser amplitude fluctuations from a desired signal in a multi-line laser system and a detection system having improved noise cancellation are provided. This...
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7260126 |
Optical pulses emitter
An optical pulses emitter includes a first and a second Fabry-Perot laser diodes. The first and second laser diodes have a first and second working optical wavelength band respectively, and the...
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7260043 |
Recording/reproducing apparatus, and method of detecting state thereof
A data recording/reproducing apparatus wherein various data to be used for maintenance are measured, and parameters required for analysis of the maintenance data are prerecorded to realize...
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7132805 |
Intelligent drive circuit for a light emitting diode (LED) light engine
A controller for controlling a light emitting diode (LED) light engine. The controller includes a temperature sensor configured to sensor temperature at the LED light engine. A current sensor...
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7106768 |
Laser light generator control circuit and laser light generator control method
The laser light generator control circuit comprises a load section, a control section, a bias current circuit section, and a modulation current circuit section. The load section generates a monitor...
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7054341 |
Methods and systems for laser processing a workpiece and methods and apparatus for controlling beam quality therein
Laser processing methods, systems and apparatus having a super-modulating power supply ( 6 ) or pumping subsystem ( 5 ) and high beam quality (i.e., brightness) are disclosed. The methods, systems...
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7037001 |
Optical module having an extension member for connecting a device to a lead terminal disposed behind the sub-mount
The present invention provides an optical module that clears the restriction of the arrangement of the lead terminal. The present optical module includes a CAN-type package having a stem, the...
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7024864 |
Bipolar current source based on a unipolar power supply
An adjustable bipolar current source for a load, such as a thermoelectric cooler, includes a voltage-controlled power supply having a unipolar output, and an H-bridge. At least one of the two...
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6973105 |
Method and apparatus to enable adaptive equalization at high bandwidths when using single-mode VCSELs over multimode fibers
A method and apparatus of using an input signal from a single-transverse mode vertical-cavity surface-emitting laser (VCSEL) with a multimode fiber (MMF) link to enable improved stabilization in...
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6963436 |
Method and device for waveform shaping of signal light
The method according to the present invention includes the steps of splitting an optical signal into first and second optical signals, increasing the pulse widths of the first optical signal to...
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6943505 |
Driving device for a light-emitting component and a method for driving a light-emitting component
The invention pertains to a driving device, for a light-emitting component, which can be universally used and is user-friendly. The driving device for a light-emitting component, particularly for a...
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6931037 |
Diode pumped, multi axial mode intracavity doubled laser
A diode pumped, multi axial mode, intracavity doubled, intracavity tripled laser, includes at least two resonator mirrors defining a resonator cavity. A laser crystal and a doubling crystal are...
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6922423 |
Control system for a semiconductor laser
A control system architecture that allows a semiconductor laser to be stabilized with respect to critical parameters, such as output power and/or emission wavelength, with a reduced cost with...
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6920162 |
Electronic or opto-electronic packages
An electronic device such as a laser diode is mounted on a heatsink assembly within a TO-can package. The heatsink assembly is mounted in heat exchange relation with a heat pipe by being on or...
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6907055 |
Method and circuit for measuring the optical modulation amplitude (OMA) in the operating region of a laser diode
A method and circuit for measuring the optical modulation amplitude in the operating region of a laser diode is described. The method utilises two measurements of OMA, each measurement being...
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6904069 |
Parasitic oscillation suppression in solid state lasers using optical coatings
A laser gain medium having a layered coating on at least certain surfaces of the laser gain medium. The layered coating having a reflective inner material and an absorptive scattering outside...
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6879606 |
Intracavity doubled laser
An optical device has a first medium that produces more photons that exit the first medium than enter the first medium, such as a gain material. A second medium that produces light of a different...
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6870863 |
Methods of controlling a laser in a WDM application
A laser used in a DWDM optical-fiber application is controlled so that, before it is powered up or down, its output power is maximally attenuated, the result being minimal cross-channel...
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6853656 |
Laser apparatus
The present invention relates to a laser apparatus comprising a laser light emitting optical system for emitting laser light to a surface, a power stabilizing system for stabilizing the laser light...
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6829280 |
Device and a method for the generation of coherent x-ray radiation
A device ( 10 ) for producing high frequency radiation using a source of elliptically polarized radiation is disclosed based on: irradiating a frequency multiplication medium having a screw axis (...
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6826209 |
Ultrabroad-band variable-wavelength wavelength-multiplexed pulse waveform shaping device
An ultra-broadband, variable and multiple wavelength, waveform shaping apparatus is disclosed that excels with the ability to yield light pulses shaped in waveform, variable and multiple in...
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6807204 |
Optoelectronic device incorporating a tunable laser and method of characterization thereof
A hybridized optoelectronic device having a multi-section laser and a wavelength measuring component such that stable operational characteristics remote from mode boundaries may be determined and...
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6801556 |
Optical source driver with output load detection circuit
A driver circuit for a laser diode or other optical source includes an input stage, an output stage, a current generator circuit and an output load detection circuit. The current generator circuit...
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6795461 |
Optoelectric module
An optoelectric module includes a cylindrical ferrule defining an optical axis and having a first end constructed to receive an optical fiber aligned along the optical axis. A TO-can is positioned...
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6788715 |
Stabilized laser using multiphoton absorption to reduce intensity fluctuations
An IAU laser is stabilized to reduce intensity fluctuations. The laser comprises an IAU gain medium disposed in an optical resonance cavity and a multiphoton absorbing medium disposed in the cavity...
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6765937 |
Apparatus and method for analysis and control of timing of a train of high speed, high power laser pulses
An apparatus and method for flexibly and precisely varying temporal placement and duration of pulses, within a train of high speed, high power optical pulses. The invention includes optics adapted...
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6760350 |
Method for measuring gain of photonic inverters
Method to measure gain of a photonic inverter based on a semiconductor laser using two different modes of operation. In one mode, the device is operated as a photonic inverter device and in the...
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6735395 |
WDM communication system utilizing WDM optical sources with stabilized wavelengths and light intensity and method for stabilization thereof
A multichannel WDM transmission system incorporates a plurality of WDM optical sources with stabilized wavelengths and light intensity. Efficient stabilization of these characteristics is achieved...
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6717968 |
Laser drive device
The laser drive device of this invention includes a laser, first and second current sources, a current amplifier, and first and second transistors. When the first transistor is OFF, a first current...
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6704334 |
Compact semiconductor laser diode module
In a semiconductor laser diode module including a semiconductor laser diode having a front facet for emitting a light beam, a collimating lens for receiving the light beam to generate a collimated...
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6697396 |
Laser light sources having integrated detector and intensity control and methods of producing same
A device to monitor light output from a light source, including a V-groove substrate with a reflective coating deposited on at least one surface, an optical fiber, a light source positioned so that...
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6697394 |
Directly modulatable laser
A directly modulatable laser comprising an active medium inside a laser cavity formed by a resonator mirror and an out-coupling mirror, and a pump light source exciting the active medium. It is...
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6693929 |
Arrangement for generating chirped return to zero (CRZ) optical data signals
Optical chirped return-to-zero (CRZ) data signals are generated without the need for a separate phase modulator, by using a dual-drive Mach-Zehnder modulator for RZ pulse carving that is driven...
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6671298 |
Photonic arbitrary waveform generation and RF and microwave synthesis with a modelocked external cavity semi-conductor laser
Photonic arbitrary waveform methods and generation by manipulating the phase-locked longitudinal modes of an approximately 12.4 GHz fundamentally modelocked external-cavity semiconductor laser are...
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6661815 |
Servo technique for concurrent wavelength locking and stimulated brillouin scattering suppression
A servo technique for concurrently providing wavelength locking and stimulated Brillouin scattering (SBS) suppression in an external cavity laser. Respective wavelength locking and SBS suppression...
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6647030 |
Tuning of optical fiber components
A tuning element tunes an optical component by adjusting the length of an optical fiber used within the optical component. Changes in length of a piezoelectric element are amplified by a surround...
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6606332 |
Method and apparatus of color mixing in a laser diode system
A color mixing system is proposed for use in an optical-fiber laser-diode assembly comprising at least two semiconductor laser diodes, optical fiber light input and output couples, a system of...
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6570904 |
Two-mirror figure “8” ring resonantor
The cavity of the invention has a pumping source, a ring cavity, a planar convex lens, an optical gain medium, and/or a nonlinear medium. The laser cavity is formed by two mirrors with the same...
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6563848 |
Semiconductor laser drive device
A semiconductor laser device comprises a semiconductor laser, a photo-diode, a first input terminal and a second input terminal. A sample hold circuit, having a first switch and a capacitor, is...
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6563847 |
Laser optical system
Disclosed is a laser optical system including a multiline laser source that emits a laser beam having a plurality of peak wavelengths, an imaging optical system that converges the laser beam...
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