Coherent light generators inventions 07/06

20060165133 - Communication apparatus, control method, and program therefor: When it is determined that a power mode is a power save mode, and that a MAC address in a received beacon matches the MAC address of a wireless communication apparatus which newly joins a wireless network, the power mode of all the communication apparatuses which have joined the wireless...

20060165134 - Method and apparatus for producing an eye-safe laser: A lasing apparatus includes a laser medium and a pump source. The laser medium includes one of a Holmium-doped fluoride crystal or a Holmium-doped fluorozirconate ZBLAN glass fiber. The pump source generates pulses that resonantly pump the laser medium such that the laser medium produces an output from the 5I5...

20060165135 - Method for oscillating variable-pulse width laser and variable-pulse width laser equipment: A saturable absorber functioning as a Q-switch is disposed on a path of a light in a laser resonator provided with a laser medium, the saturable absorber disposed in the laser resonator is transferred relatively toward the path of the light, and an initial transmittance of the saturable absorber in...

20060165136 - Coherent light source based on sum-frequency mixing: A method and a device for generating visible coherent radiation is disclosed. The visible coherent radiation is generated by sum-frequency mixing of a first fundamental beam from a diode laser and a second fundamental beam from a diode-pumped solid-state laser. The mixing is performed by means of a quasi-phasematching element...

20060165138 - Frequency doubling of semiconductor lasers to generate 300-600 nm light: A novel control system for a simple and compact all-solid-state laser generating 300 nm to 600 nm nm light with continuously variable output power in the range from 1 mW to at least 120 mW. Single frequency radiation from an external cavity semiconductor laser is frequency doubled in, for example,...

20060165137 - Novel external cavity cw frequency doubling of semiconductor lasers to generate 300-600nm light: A novel control system for a simple and compact all-solid-state laser generating 300 nm to 600 nm nm light with continuously variable output power in the range from 1 mW to at least 120 mW. Single frequency radiation from an external cavity semiconductor laser is frequency doubled in a periodically...

20060165139 - Apparatus and method for measurement for dynamic laser signals: A system contains a laser output measurement circuit used in a laser control system (210). The circuits contain a photodiode (109), sample and hold amplifier (202), IC with synchronizer and delay circuits (206), and an analog to digital converter (204). The circuits measure the laser light output (107) while the...

20060165140 - Temperature compensated laser system: A Temperature Compensated Laser System (“TCLS”) for producing a temperature compensated laser drive current for a laser in an optical navigation device is described. The TCLS may include a controller in signal communication with an adjustable current source, wherein the adjustable current source produces the temperature compensated laser drive current....

20060165141 - Method and device for pumping a laser: The invention relates to a method and devices for pumping a laser, and to a laser element, which is specially designed therefor and which contains laser-active material. In order to prevent the laser-active material from being subjected to excessive thermal stress, particularly during a thin disk setup, an, in essence,...

20060165142 - Calibration of laser systems: A method for determining a condition of the laser system includes determining a change in a laser current from an initial value. A method for measuring a laser current includes determining a difference between the values of a power supply current, which is the value of the laser current. A...

20060165143 - Nitride semiconductor laser device and manufacturing method thereof: In the fields of semiconductor laser devices made of nitride semiconductor layers, the present invention provides a semiconductor laser device having higher output and longer lifetime characteristics and a manufacturing method thereof. The semiconductor laser device according to the present invention includes a resonator that has: the first cladding layer...

20060165144 - Semiconductor laser device: The invention relates to a semiconductor laser devcie, including a semiconductor laser element, or a number of individual lasers mounted parallel to each other, with a number of output surfaces, from which laser light can escape, having a treater divergence in a first direction (Y) than in a second direction...

20060165145 - Diode-pumped ~812 nm thulium-doped solid state laser: A diode-end-pumped ˜812 nm thulium doped solid state laser is disclosed, with improved efficiency and practicality. The inventive laser device include laser active media comprising a thulium doped dielectric solid state gain element, placed within a laser cavity, and diode-end-pumped with ˜780 nm pump radiation. Solid state lasers emitting at...

20060165146 - Systems and methods for utilizing pulsed radio frequencies in a ring laser gyroscope: A ring laser gyroscope is described which includes a gyroscope block, a radio frequency transmitting device, and a radio frequency energy source. The a gyroscope block has at least one discharge bore containing a gain medium, and the radio frequency transmitting device is located within the gyroscope block in proximity...

20060165147 - Single mode distributed feedback laser: A single mode distributed feedback laser for producing a single mode light comprises a semiconductor substrate; a lower clad positioned on the semiconductor substrate and having a plurality of gratings that are arranged to be spaced apart at regular periods from one another; a waveguide grown on the lower clad...

20060165148 - Distributed bragg's reflector of digital-alloy multinary compound semiconductor: There is provided a distributed Bragg's reflector (DBR) comprising a substrate and an unit distributed Bragg's reflector (DBR) layer, wherein a multi-layer is laminated on the substrate. The unit DBR layer is composed of a multi-layer laminated structure of unit digital-alloy multinary compound semiconductor layer/multinary compound semiconductor layer or unit...

20060159131 - Digital signal regeneration, reshaping and wavelength conversion using an optical bistable silicon raman laser: An optical bistable silicon Raman laser is disclosed, which provides digital signal regeneration, reshaping and wavelength conversion. An apparatus according to aspects of the present invention includes an optical waveguide disposed in semiconductor material. First and second reflectors are disposed in the optical waveguide. The first and second reflectors define...

20060159132 - System and method for a passively q-switched, resonantly pumped, erbium-doped crystalline laser: The laser includes a resonant cavity formed between a first mirror and a second mirror. An unsensitized Erbium-doped crystal gain medium for producing laser gain is disposed within the resonant cavity. A saturable absorber is disposed within the resonant cavity. A pump source is positioned to energize the gain medium....

20060159133 - Fabricating method of semiconductor laser and semiconductor and semiconductor laser: A method for manufacturing a semiconductor laser is provided. The method includes the steps of sequentially growing a lower clad, a lower waveguide and a multi-quantum well on a semiconductor substrate; forming, on the multi-quantum well, masks each possessing a first area which has a constant width and a second...

20060159134 - Continuous wavelength tuning of dbr laser: A continuous tunable laser system includes at least one DBR laser. The DBR laser includes a Phase section, a Braggs section, and a gain medium. The DBR laser is capable of generating a continuous-wave laser signal. A Phase current input is electrically connected to the Phase section. A Bragg current...

20060159135 - Narrow linewidth semiconductor laser device: There is provided a narrow linewidth semiconductor laser device comprising a semiconductor laser and a low noise current source operatively connected to the laser for supplying current thereto, the current source being particularly adapted to prevent a significant degradation of the frequency noise spectrum of the laser. The laser device...

20060159136 - Beam combiner: A laser arrangement with a resonant cavity which is folded by a folding mirror is disclosed. A quarter wave plate and a retro-reflector are arranged outside one of the cavity mirrors. Frequency converted light that exits the cavity through this cavity mirror passes the wave plate twice before re-entering the...

20060159138 - Pulsed laser light source: A pulsed laser light source is provided. A continuous light beam is first generated by a CW laser source such as a laser diode, a superfluorescent source or a CW solid state laser. The continuous light beam is then modulated by a first modulator, and further shaped by a second...

20060159137 - Pulsed laser source with adjustable grating compressor: Various embodiments described herein relate to a laser source for producing a pulsed laser beam comprising a plurality of ultrashort optical pulses having a variable repetition rate. In one embodiment, the laser source comprises a fiber oscillator, which outputs optical pulses and a pulse stretcher disposed to receive the optical...

20060159139 - 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 laser that generates a pulsating beam of laser light, an external modulator having an input that receives the pulsating...

20060159140 - Laser oscillator and method of estimating the lifetime of a pump light source: A laser oscillator enabling estimation of the lifetime of the pump light source by a simple configuration, provided with a pump light source, a power source supplying current to the pump light source, a laser crystal outputting laser light by the pump light emitted from the pump light source, a...

20060159141 - Optical transmitting module operable in wide temperature range: The present invention relates to an optical transmitting module that reduces the deviation of the emission wavelength even in a wide range of the operating temperature. The module comprises a laser diode (LD), a Peltier element to control the temperature of the LD, a first sensor to sense the temperature...

20060159142 - 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 are presented. Disclosed embodiments describe various methods of applying mathematical models and digital signal processing algorithms to continuously calculate and execute precise output power...

20060159143 - Method of controlling a diode device for use in optical storage systems: A system and method is provided which compensates for the effects of relaxation oscillations and turn-on delays of diode laser devices. In particular, there is provided a method and system for tuning the shape of the power profile of an output optical signal and its position with respect to a...

20060159144 - Laser element and method for manufacturing the same: [Problem] It is an object of the present invention to provide a method that can provide regions having different thicknesses of a laminated body containing an organic compound with a light-emitting property in the same element and also can apply an electric field uniformly in all the regions of the...

20060159145 - Semiconductor laser and the method for manufacturing the same: The present invention is to provide a semiconductor laser with a feedback grating comprised of InP and AlGaInAs without InAsP put therebetween, and to provide a method for manufacturing the DFB-LD having such grating. The LD includes an n-type InP substrate, an AlInAsP intermediate layer, an AlGaInAs lower SCH layer,...

20060159146 - Semiconductor laser diode: In a semiconductor laser diode, a mount portion is erected on a support member and a semiconductor laser diode chip is mounted on the mount portion. A window is formed on a cap, and a laser beam generated by the semiconductor laser diode chip is emitted through the window to...

20060159147 - Symmetrization device and laser diode system provided with the same: A symmetrization device and laser diode system using such a device is shown. The device has adjacent lens components transforming beamlets from a laser diode array. Each lens component has input and output surfaces, each having a profile in the propagation direction of the beamlets and a contour perpendicularly thereto....

20060159148 - Optical element: An optical element includes a surface-emitting type semiconductor laser, and a light-receiving element that detects a part of laser light emitted from the surface-emitting type semiconductor laser, wherein the light-receiving element is formed above the surface-emitting type semiconductor laser and includes a semiconductor layer having one or more layers, and...

20060159149 - Systems and methods for optical pumping using depolarizing filters: An optical system comprises optical pump lasers, depolarizing filters and a multiplexer. A plurality of optical pump lasers generates a plurality of initial optical signals at different wavelengths. A plurality of depolarizing filters depolarize the plurality of initial optical signals. A multiplexer multiplexes the plurality of initial optical signals to...

20060159151 - Device for switching a laser beam, laser machining device: A switch-over device is disclosed for selectively switching a linearly polarized input laser beam to a first output laser beam or to a second output laser beam. The switch-over device includes a primary optical switch-over element having a primary optical element for selectively rotating the polarization direction of the input...

20060159152 - Laser oscillator: A laser oscillator capable of restraining the generation of a diffracted beam so as to obtain a laser beam with high power and high quality. The laser oscillator has an output mirror, a rear mirror and first and second concave mirrors. These mirrors cooperate together so as to form a...

20060159150 - 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 of laser radiation circulates in the laser resonator generally in a path along the Z-axis. An optical arrangement is...

20060159153 - Laser level: A laser level disposable on a reference surface includes a housing, a pendulum pivotably connected to the housing, a first laser diode disposed on the pendulum for emitting a first laser beam along a first path, a first lens disposed on the pendulum in the first path for converting the...

20060153251 - Stretched-pulse raman fiber lasers and methods of operating the same: A method of operating a stretched-pulse Raman fiber laser includes producing laser radiation gain in a laser cavity using predominantly Raman amplification. Such a stretched-pulse Raman fiber laser has a laser cavity that includes a Negative Group Velocity Dispersion Fiber connected in series with a Positive Group Velocity Dispersion Fiber,...

20060153252 - Optical reading apparatus and method of reading data: This apparatus having an optical head (15—FIG. 1)) for reading data stored in an optical carrier (1) comprises: a light source constituted by a first laser (50) or master laser for illuminating said carrier, an optical mounting (58) for directing the reflected light from said carrier to a detection branch...

20060153253 - Frequency setting of a multisection laser diode taking into account thermal effects: A system in which the controller (24) of a multi section diode laser such as a SG-DBR (10) is configured so that the laser can be swept rapidly in a pre-determined frequency direction through a series of frequency points by asserting a pre-calibrated series of sets of control input values...

20060153254 - Laser system for generation of high-power sub-nanosecond pulses with controlable wavelengths in 2-15 mum region: A laser system capable of efficient production of high energy sub-nanosecond pulses in the 2-15 μm spectral region is disclosed. Diode pumped solid state lasers are used as pump sources. The system design is simple, reliable and compact allowing for easy integration. The laser system includes a combination of compact...

20060153255 - Terahertz wave generation system: To make a terahertz wave generation system capable of easily illuminating terahertz wave on an arbitrary position and to easily realize the system for practical use by effectively using existing systems and devices, the terahertz wave generation system has: a two-wavelength oscillation laser device capable of simultaneously oscillating laser light...

20060153257 - Laser amplifiers with high gain and small thermal aberrations: The present invention discloses a laser amplifier with high gain and low thermally induced optical aberrations on the amplified laser beam. The amplifier designs allow simple multipass configurations to optimally extract the gain and reduce thermally induced index of refraction aberrations, making it possible to obtain an amplified laser beam...

20060153256 - Laser temperature performance compensation: The invention presents a method that calibrates the laser optical power in a continuous manner without disrupting the flow of information in the optical communications link. The method utilizes knowledge of the measured value of the laser optical power and makes necessary adjustments to optimize the values of the Extinction...

20060153258 - Laser beam transmitter: A laser oscillator includes a light condensing block having a through-hole for housing a laser medium, and an aperture for introducing excitation light from an excitation light source module into the through-hole; an end plate fixed to an end of the light condensing block, in which a cooling water channel...

20060153259 - Laser drive, optical disc apparatus, and laser-driving method: A laser drive includes a variable output voltage source that can control an output voltage, a laser source connected to the variable output voltage source, a laser drive circuit that drives the laser source, and a monitoring controller that monitors an operating voltage of the laser drive circuit and controls...

20060153260 - Erbium doped fibers: A method of producing green light signals couples pump signals from at least one pump source into at least one erbium doped fiber (EDF) to cause ground state absorption (GSA) and excited state absorption (ESA) in erbium ions of the EDF, which produces green light signals. The majority of the...

20060153261 - Optically-pumped -620 nm europium doped solid state laser: An optically-pumped ˜620 nm europium doped solid state laser is disclosed, with improved efficiency and practicality. The inventive laser device include laser active media comprising an europium doped dielectric solid state gain element, placed within a laser cavity, and pumped with either green (˜530 nm) or blue (˜470 nm) pump...

20060153262 - Terahertz quantum cascade laser: A laser comprising: a substrate comprising a bulk region and a conducting layer; an active region (11) comprising a quantum cascade structure provided on a first surface of the substrate (12) such that said active region (11) is electrically connected to said conducting layer; first and second contacts (16, 17)...

20060153263 - Method of producing fluorite crystal, fluorite and optical system incorporating the same: There is provided a method of forming a fluorite crystal and an exposure apparatus including this fluorite crystal. A method of manufacturing a device using the exposure apparatus is also provided....

20060153264 - Waveguide laser: A laser waveguide, where the laser waveguide can be formed by electrodes and at least one sidewall in a manner allowing a more compact structure than previously provided. Protrusions in the electrodes allow easier laser starts, and sectional sidewall(s) allow easier fabrication of sidewall(s), decreasing manufacturing costs....

20060153266 - Diode-pumped solid laser comprising a thermal lens inside the resonator: l

20060153265 - Multimode solid laser pumped longitudinally by diodes:

20060153267 - Multiple resonator and variable-wavelength light source using the same:

20060153268 - Tunable ring laser with external grating operation in a single mode: A tunable lasing device (100) comprising a ring-shaped laser cavity (102), an optical gain element (104), a bi-directional output coupler (106) and a frequency selection means (114). The frequency selection means is generally a grating with a refractive index that determines a grating reflection frequency. Single mode laser operation is...

20060146892 - Method and apparatus for obtaining and maintaining mode-locking in fiber laser systems: A method and apparatus for detecting and controlling the conditions needed for starting and maintaining mode-locked operation of a laser system including a fiber oscillator and high power fiber amplifier. The invention is used to monitor the output power and repetition rate of the fiber oscillator and control the operation...

20060146893 - Laser: Embodiments of a laser are disclosed....

20060146894 - Temperature compensating method of laser power in optical disk storage apparatus: A temperature compensating method of laser power in an optical disk storage apparatus is disclosed whereby temperature is compensated so that laser power outputted by a laser diode can be constantly outputted regardless of temperature changes. According to the present invention, a current temperature for operating the laser diode is...

20060146895 - Apparatus for controlling laser output: Provided is an apparatus for controlling a laser output comprising a common-anode laser diode having a first light emitting and receiving units and a common-cathode laser diode having a second light emitting and receiving units. Further, the apparatus comprises an automatic power controller (APC) that operates in either one of...

20060146896 - Laser optical apparatus: A laser optical apparatus which removes speckles from a screen by changing the phase of a laser beam so as to form an image having high visibility. The laser optical apparatus includes an incident unit on which a laser beam is incident; a multichannel connector having at least two channels...

20060146897 - 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, SBS Phase Conjugation does not take place until a specific level is achieved based on several factors...

20060146898 - Production of tuneable picosecond light impulses in a visible spectral range: The invention relates to a device for the production of tuneable light impulses in a visible spectral range, comprising a laser system (LS) which emits femtosecond light impulses in the infrared spectral range, and an optical frequency converter (FC) for converting the wave lengths of the light impulses into the...

20060146900 - Multi-chamber gas discharge laser bandwidth control through discharge timing: A method and apparatus are disclosed for controlling bandwidth in a multi-portion laser system comprising a first line narrowed oscillator laser system portion providing a line narrowed seed pulse to an amplifier laser system portion, may comprise utilizing a timing difference curve defining a relationship between a first laser system...

20060146899 - Semiconductor laser diode device, and method for manufacturing the same: The semiconductor laser diode device comprises a semiconductor laser diode, a primary lead having a sub-mount for mounting the semiconductor laser diode, at least one secondary lead electrically insulated from the primary lead, a first resin member for integrally fixing the primary lead and the secondary lead while insulating the...

20060146901 - Holmium doped 2.1 micron crystal laser: A Ho:YAG crystal laser is disclosed which is doped with less than 2% holmium to reduce the lasing threshold and up-conversion, thereby increasing the operating efficiency of the laser. The laser does not need sensitizer ions so energy mismatches introduced by the sensitizer ions ale eliminated to the thereby increase...

20060146902 - Distributed feedback laser including algainas in feedback grating layer: The present invention provides a distributed feedback laser diode (DFB-LD), in which the active region may be easily flattened. The active region of the invention is optically coupled with the feedback grating made of the n-type InP layer and the n-type AlGaInAs layer. Since both layers show the n-type conduction,...

20060146903 - Semiconductor light emitting device suppressing radiation of light other than light having desired wavelength: A luminescence structure is formed on a substrate made of semiconductor or insulator. The luminescence structure has a lamination structure that an active layer made of semiconductor is sandwiched between a pair of clad layers made of semiconductor. The clad layer is made of the semiconductor having a band gap...

20060146904 - Integrated light emitting device and photodiode with ohmic contact: Optoelectronic device including integrated light emitting device and photodiode. The optoelectronic device includes a light emitting, device such as a vertical cavity surface emitting laser (VCSEL) or resonant cavity light emitting diode (RCLED). A photodiode is also included in the optoelectronic device. Between the light emitting device and the photodiode...

20060146905 - Excimer laser with electron emitters: An apparatus, system, and method for an excimer laser having lasing gas and electron emitters emitting electrons upon the application of an emitting voltage is described herein....

20060146906 - Llp euv drive laser: An apparatus and method is disclosed which may comprise an EUV drive laser system comprising: a solid state seed laser master oscillator laser; a gas discharge excimer laser gain generator producing a drive laser output light beam. The solid state seed laser may comprise a third harmonic Nd:YLF laser, which...