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| Number | Title | Issue Date |
| 6996143 | Semiconductor laser device A semiconductor laser device has a laser chip, a stem having a block portion on which the laser chip is mounted, and a cap mounted on the stem so as to cover the block portion. The cap has a cutout portion into which the block portion is partially inserted. With thi... | 02/07/2006 |
| 6996152 | Photonic-crystal distributed-feedback and distributed bragg-reflector lasers A photonic-crystal distributed-feedback laser includes a laser cavity with a waveguide structure that has a cavity length Lc and is bounded by two mirrors; an active region for producing optical gain upon receiving optical pumping or an input voltage; at ... | 02/07/2006 |
| 6993058 | Coherent population trapping detector A CPT detector and a method for detecting CPT are disclosed. The CPT detector includes a quantum absorber, a polarization analyzer, and a detector. The quantum absorber includes a material having first and second low energy states coupled to a common high energy sta... | 01/31/2006 |
| 6992774 | Wavelength determining apparatus and method An apparatus for determining the wavelength of light emitted by, for example, a laser, includes three photodiodes. One photodiode receives a proportion of the light redirected from the main optical path by a beam splitter. A second photodiode receives a proportion o... | 01/31/2006 |
| 6993257 | Optical channel monitor utilizing multiple Fabry-Perot filter pass-bands An optical channel monitor is described, the optical channel monitor includes an optical input port, a photodetector disposed in an optical path communicating at least intermittently with the optical input port, an optical filter disposed in the optical path between... | 01/31/2006 |
| 6993687 | Information processing device and information processing method, maintenance information management system and recording medium According to the present invention, maintenance data about a plurality of distribution terminal devices which are different from each other in frequency with which they are in use and circumstances under which they are in use are transmitted to a host computer, wher... | 01/31/2006 |
| 6987914 | Optical filter having coupled whispering-gallery-mode resonators Optical filters having at least two coupled whispering-gallery-mode (WGM) optical resonators to produce a second order or higher order filter function with a desired spectral profile. At least one of the coupled WGM optical resonators may be tunable by a control sig... | 01/17/2006 |
| 6983000 | Laser diode module A laser diode module includes a laser diode device, a first photo detector part for receiving, first divided light that is a first portion of light when at least one of light emissions of the laser diode device is divided into two portions of light each traveling a ... | 01/03/2006 |
| 6979582 | Vertical-cavity surface emitting laser diode and method for producing the same The present invention provides a vertical-cavity surface emitting laser (VCSEL) diode and a method for producing the same. In this method, an n-type and a p-type ohmic contact electrodes are previously disposed, and then two pairs of distributed Bragger reflectors (... | 12/27/2005 |
| 6977950 | Power distribution network for optoelectronic circuits Method and arrangement are disclosed for a power distribution network for distributing power to VCSELS on an optoelectronic chip that maintains a constant bias voltage to the VCSELs. More particularly, the power distribution network includes an H-tree network for di... | 12/20/2005 |
| 6975658 | Gain normalization for automatic control of lightwave emitters Circuits and methods for automatically controlling lightwave emitters are provided. A control system is provided that includes a variable gain circuit for automatically adjusting the gain of a control signal with respect to a feedback signal, a modulation signal, an... | 12/13/2005 |
| 6975465 | Method and apparatus for use of beam control prisms with diode laser arrays The subject invention relates to beam control prisms and the use of a beam control prism to modify the beam properties of light emitted from an edge emitting diode laser. The subject invention can utilize a beam control prism placed next to a diode laser bar. The su... | 12/13/2005 |
| 6973228 | Wavelength stabilizing apparatus and control method A wavelength stabilizing apparatus utilized in an optical communication system for controlling a light wave output from a tunable optical component is disclosed. The wavelength stabilizing apparatus includes a coarse-tuning element, a fine-tuning element, and a serv... | 12/06/2005 |
| 6972631 | Rubidium frequency standard control method and system for voltage-controlled oscillators A rubidium frequency standard control circuit which utilizes an initial sweep hand-off frequency locking process followed by a negative feedback loop for optimization of the stability of the voltage control oscillator employing the rubidium frequency standard. ... | 12/06/2005 |
| 6973106 | Optical package and optical systems apparatuses, and methods of use therein Optical systems of the present invention include optical devices, such as lasers and other optical sources, that are packaged, or housed, in a structure employing a high thermal conductivity, low effective thermal mass member, such as a heat pipe. The high thermal c... | 12/06/2005 |
| 6970492 | DUV and VUV laser with on-line pulse energy monitor A beam parameter monitoring unit for coupling with an excimer or molecular fluorine (F2) laser resonator that produces an output beam having a wavelength below 200 nm includes an on-line laser pulse energy detector. This, in turn, allows output pulse ener... | 11/29/2005 |
| 6967977 | Optical pulse train generator A laser source provides a pulse that is subdivided and replicated into subpulses by a delay structure having a plurality of steps. Each of the subpulses is delayed by one of the plurality of steps and the amount that each subpulse is delayed is different than the ot... | 11/22/2005 |
| 6967322 | Method and apparatus for performing rapid isotopic analysis via laser spectroscopy Method and apparatus for providing real-time data indicative of the isotopic composition of formation fluids during drilling. The method includes the steps of: (a) providing a reference fluid having a known isotopic composition in a reference cell; (b) capturing a s... | 11/22/2005 |
| 6967976 | Laser with reflective etalon tuning element A tunable laser and laser tuning method based on the use of a tunable etalon in reflection as a mirror within a laser cavity and forming an end reflective surface thereof. The laser emission wavelength is not necessarily at a wavelength of peak etalon reflectivity. ... | 11/22/2005 |
| 6965722 | High efficiency active matching electro-optic transducer driver circuit operable with low supply voltages An optical transmitter and/or a constituent electro-optic transducer driver that performs active matching. The transducer driver performs active matching using a voltage step down through one base-emitter bipolar transistor, followed by a step up approach through th... | 11/15/2005 |
| 6965622 | Wavelength locking scheme and algorithm for ultra-high density WDM system The present invention is directed toward a laser wavelength locking scheme suitable for incorporation into WDM systems having channel spacings of 25 GHz or less. In a preferred embodiment, light output from the laser is supplied to a filtering element, such as an in... | 11/15/2005 |
| 6963595 | Automatic gas control system for a gas discharge laser An automatic F2 laser gas control, for a modular high repetition rate ultraviolet gas discharge laser. The laser gas control includes techniques, monitors, and processor for monitoring the F2 consumption rates through the operating life of the ... | 11/08/2005 |
| 6963442 | Low-noise, switchable RF-lightwave synthesizer A frequency synthesizer for generating a multiple tone lightwave signal that can be converted into an RF carrier or local oscillator signal. The frequency synthesizer comprises a multiple mode master laser, two slave lasers injection-locked to the master laser, an o... | 11/08/2005 |
| 6960773 | System and method for maskless lithography using an array of improved diffractive focusing elements A maskless lithography system is disclosed that includes an array of blazed diffractive zone plates, each of which focuses an energy beam into an array of images in order to create a permanent pattern on an adjacent substrate in certain embodiments. In further embod... | 11/01/2005 |
| 6961355 | Variable power pulsed secondary beam laser Lasers are provided to deliver a wide variety of wavelengths at variable pulse energy. A laser cavity is formed between a first and second reflective surface. A lasing medium is located within cavity which lases at a preselected fundamental frequency. One or more no... | 11/01/2005 |
| 6956886 | Discreetly tunable semiconductor laser arrangement for wavelength division multiplex communication systems A wavelength selection element for a tunable laser provides for a single laser structure system that can be made to generate any specific wavelength. The wavelength selection element comprises a transmission component which may include an arrangement of optical comp... | 10/18/2005 |
| 6956887 | Resonant fabry-perot semiconductor saturable absorbers and two photon absorption power limiters An intracavity resonant Fabry-Perot saturable absorber (R-FPSA) induces modelocking in a laser such as a fiber laser. An optical limiter such as a two photon absorber (TPA) can be used in conjunction with the R-FPSA, so that Q-switching is inhibited, resulting in la... | 10/18/2005 |
| 6953487 | Metallic gas cells and method for manufacturing the same A metallic gas cell including a metallic casing having an input open end and an output open end, and a opening located therebetween. The metallic gas cell also includes an input and an output optical modules, each being respectively hermetically attached to one of t... | 10/11/2005 |
| 6952267 | Method and apparatus for measuring bandwidth of a laser output A method and apparatus for measuring bandwidth of light emitted from a laser which may comprise: first and second wavelength sensitive optical bandwidth detectors providing, respectively, an output representative of a first parameter indicative of the bandwidth of t... | 10/04/2005 |
| 6947455 | Maintaining desirable performance of optical emitters at extreme temperatures A method of maintaining desirable optical performance of an optoelectronic apparatus at extreme temperatures is disclosed. At a first temperature, a first bias current at which the laser generates optical signals at a first level is determined. At a second temperatu... | 09/20/2005 |
| 6947458 | Power control circuit for laser diode having wavelength compensation A control circuit for a laser diode includes a power controller and a wavelength controller. The power controller adjusts a bias current to the laser diode to change the power output of the laser diode. The power change can have a corresponding wavelength shift effe... | 09/20/2005 |
| 6947457 | DFB laser driving device, DFB laser driving method and storage medium When set values of a wavelength and a output level are input, the input set values (of the wavelength and the output level) are collated with data (A), and then, an approximate temperature of a DFB laser is calculated. The calculated approximate temperature is colla... | 09/20/2005 |
| 6947139 | Simultaneous optical isolation and channel monitoring system A simultaneous optical isolation and channel monitoring system for monitoring a channel of an incident light is provided. The system includes an optical isolator for receiving an incident light so as to isolate an interference of backward light into the cavity of la... | 09/20/2005 |
| 6947218 | Fabry-perot etalon with independently selectable resonance frequency and free spectral range The invention relates generally to optical interference filters and interferometers. Methods, devices and device components for optical signal generation and processing using optical interference filters and interferometers are presented. The invention provides opti... | 09/20/2005 |
| 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 laser, includes an interface device for inputting a control signal s... | 09/13/2005 |
| 6943889 | Athermal interferometric device An athermal interferometric wavelocker is disclosed having a beam splitter combiner and a first arm of a first material having a first refractive index, a first length, and a first coefficient of expansion; and, a second arm of a second material having a second refr... | 09/13/2005 |
| 6944203 | Multimode light generating module, semiconductor laser apparatus, and optical fiber amplifier A multimode light generating module comprises an optical cavity and a light-receiving element. The optical cavity is constituted by a semiconductor optical amplification element, and an optical fiber having a grating. The optical fiber comprises a grating having an ... | 09/13/2005 |
| 6940881 | Tunable laser with wavelength locking A laser system including a controller for monitoring and controlling various functions of a laser assembly. The laser controller may include a wavelength tuning circuit for adjusting and locking the wavelength of the external cavity. To perform various monitoring an... | 09/06/2005 |
| 6940877 | High-power narrow-linewidth single-frequency laser A narrow-linewidth high-power single-frequency laser is realized by pumping a laser cavity with a pair of polarized single-mode pump lasers that are driven below their respective “micro-kink” regions and combined with a polarized beam combiner. The pump lasers e... | 09/06/2005 |
| 6940887 | Gain optimizing for stable single mode operation of external cavity laser Known laser diode selections are limited to those designed for high power applications (high gain) or those designed for stable single mode operation in an external cavity (low gain). Exponential gain of laser diodes implemented according to embodiments of the prese... | 09/06/2005 |
