Matches 1 - 37 out of 37


Match Document Document Title
US20050249252 Method and apparatus for digital signal processing enhanced laser performance compensation  
Methods for controlling lasers or other light emitting devices to compensate for performance degradations due to temperature changes and aging without disrupting the transmission of information...
US20060280213 Laser oscillator  
Provided is a laser oscillator (2) including: a first electrode pair (7a); a second electrode pair (7b); a discharge power supply (4) that induces pulse discharge in the first and second electrode...
US20070223544 Laser beam processing apparatus  
This laser processing apparatus includes an amp fiber, a seed laser oscillating unit, a fiber core exciting unit, a laser emitting unit, a controlling unit, a light sensor, etc. A Q-switched pulse...
US20090003397 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...
US20070116076 Controlling optical power and extincation ratio of a semiconductor laser  
Disclosed herein are methods, apparatus, and systems to achieve substantially constant optical power and/or extinction ratio for a semiconductor laser. In one aspect, a microcontroller of an...
US20120002691 SYSTEM AND METHOD FOR PROVIDING A SAFETY MECHANISM FOR A LASER-EMITTING DEVICE  
This invention generally relates to systems and methods for providing a safety mechanism for a laser-emitting device, and more specifically, to providing a safety mechanism for a portable...
US20060140233 Laser driver with integrated bond options for selectable currents  
A programmable laser driver may be programmed to meet the characteristics of a particular laser. Traditionally, external resistors are used to bias the driver and program the value of the drive...
US20050111504 Laser oscillator  
A laser oscillator capable of executing a high-speed feedback control by reducing the control load of a main processor in the feedback control of the laser output. The laser is excited by an...
US20070280314 INTEGRATED CIRCUIT FOR DRIVING A LIGHT SOURCE  
An integrated circuit is provided for driving a light source. The light source outputs light. A light receiver receives part of the light output from the light source. In response to a detection...
US20070047603 Optical Transmitter with Monitoring Photodiode Compensated in Temperature Dependence Thereof  
The optical transmitter according to the present invention is capable of reducing wavelength fluctuations of a semiconductor laser (laser diode) owing to the temperature dependence of the light...
US20060126684 Real time constant excitation ratio (ER) laser driving circuit  
Adverse effects to laser excitation ratio slope caused for example by ambient temperature maybe compensated for by adjusting drive current to the laser. The real time excitation ratio slope may be...
US20050053107 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...
US20060285563 Optical apparatus  
The present invention is an optical apparatus which enables highly accurate detection of the LD ambient temperature by means of a simple constitution. The apparatus of the present invention...
US20050058172 System and method for segmented electrode with temporal voltage shifting  
The stability of a gas discharge in an excimer or molecular fluorine laser system can be improved by generating multiple discharge pulses in the resonator chamber, instead of a single discharge...
US20060002439 Laser output control apparatus and method  
A laser output control apparatus and method are provided. The laser output control apparatus includes a laser unit including a laser diode and a photo diode having at least one connection...
US20060187983 Light emitting element driving circuit, and optical transmission apparatus and optical transmission system using the same  
A light emitting element driving circuit includes: plural AC-coupling capacitors which are connected together in series; and a bias generating circuit which generates a bias current, wherein a...
US20050053106 Nitric oxide stimulation laser and method  
A nitric oxide-stimulation laser has an applicator packet (1) containing at least one diode chip (2) with dedicated emission of infrared (IR) light in wavelengths of predeterminedly proximate...
US20150146752 LIGHT EMITTING DEVICE AND IMAGE DISPLAY APPARATUS  
A light emitting device includes: a light emitting element; and a temperature variable resistive element which is connected to the light emitting element in parallel and is provided so that heat...
US20120039349 CIRCUIT FOR CONTROLLING A GAIN MEDIUM  
An assembly (10) that generates a laser beam (12) includes a voltage source (14), a gain medium (24A), a closed loop current regulator (22), and a controller (18). The gain medium (24A) generates...
US20150255948 LASER EXCITATION PULSING SYSTEM  
A laser excitation pulsing system is provided. The system includes a pulse transformer having a plurality of parallel connected primary windings and a secondary winding wound around a toroidal...
US20050105574 Laser driver for optical communication network  
A transistor, such as a FET or bipolar transistor, may be gate or base coupled to a laser driver output stage to receive a varying voltage from a driver output stage. The transistor converts the...
US20100272139 DRIVING CIRCUIT FOR DRIVING LASER DIODE AND METHOD FOR CONTROLLING LASER POWERS OF LASER DIODE  
The invention provides a driving circuit for driving a laser diode of a pickup head. In one embodiment, the driving circuit comprises an automatic power control (APC) module, a clamp value...
US20050030990 Stability factors for tuneable multi-section semiconductor lasers  
A method is described for qualifying a multisection semiconductor laser using measurements of excursions from stable operating conditions to neighbouring mode boundaries at which the laser...
US20070091947 Laser diode drive circuit, method for controlling the same, and semiconductor integrated circuit (IC) for driving laser diode  
A laser diode drive circuit drives a high-power laser diode using a single voltage source and a transistor. The laser diode drive circuit includes: a voltage-level shifter shifting an output...
US20080310468 Laser Diode control method, laser Diode control device, and camcorder  
A laser diode is controlled such that a writing operation can be performed readily even at a low temperature and equal to or below the operation guarantee temperature range of the laser diode. A...
US20070280313 Method and Apparatus for Driving a Light Emitting Device  
A method for driving a light emitting device includes providing a first current source coupled to an input terminal of the light emitting device, and providing a second current source coupled to...
US20060109879 Compensation of mode jumps in multi section lasers  
The invention provides a method and system for compensating variations in tuning efficiency and power of a multi-section tunable laser diode. The invention comprises a means to obtain a set of...
US20110228803 VCSEL WITH INTEGRAL RESISTIVE REGION  
In one embodiment, a VCSEL includes a plurality of semiconductor layers, an insulative region, a resistive region, and a remainder region. The semiconductor layers include a lower mirror, an...
US20070147451 Laser diode driver  
There is provided a laser diode driver including a DC current source supplying DC current to a laser diode, and a plurality of high frequency current sources alternately superposing onto the DC...
US20060182158 Information recording reproduction apparatus and information reproduction method  
An information recording reproduction apparatus includes a laser light source, a laser driving unit which supplies a laser driving signal to the laser light source to make it emit a laser light...
US20060007970 Coherence reduction of diode lasers  
The invention provides a method of reducing a time-averaged coherence of laser radiation for current-tunable lasers, and a laser apparatus realizing the method, by modulating the laser drive...
US20090196315 PULSED LASER OSCILLATOR WITH VARIABLE PULSE DURATION  
The present invention relates to the field of pulsed laser oscillators. It relates to a pulsed laser oscillator (15) for emitting a laser pulse, including a laser cavity (15), said laser cavity...
US20050271100 System and method for controlling optical sources, such as laser diodes, and computer program product therefor  
A system for controlling operation of an optical source, such as a laser diode for optical communications, by controlling a bias current and a modulation current supplied thereto. With the source...
US20090190620 OPTICAL DISK DEVICE AND METHOD OF CONTROLLING LIGHT EMITTING ELEMENT  
An optical disk device includes: a light emitting element which applies light to an optical disk; a light detection unit which receives the light emitted from the light emitting element and...
US20060171432 Optical beam output controller and optical disk device  
The present invention enables to stably output an optical beam. The present invention provides an upper limit value comparator for comparing a low bandwidth signal according to an output intensity...
US20160359297 MULTIPLE ENDPOINT OPTICAL TRANSMITTER  
A multi-endpoint optical transmitter includes a first laser to couple to a first optical fiber, a second laser to couple to a second optical fiber, and a current-steered driver connected to the...
US20080117944 Diode laser ramping power supply  
Method and apparatus are provided that limit the current ramp rate applied to a laser bar or a single emitter laser diode to a predetermined value of 150 milliamps per millisecond or less. In...

Matches 1 - 37 out of 37