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Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 8064491 | Apparatus and method for generating short optical pulses An apparatus for generating short optical pulses is provided having a storage medium capable of storing optical energy, a first module for delivering pumping optical pulses or continuous beam into the storage medium to energize the storage medium, and a second modul... | 11/22/2011 |
| 7701990 | Laser diode pumped solid-state laser oscillator and laser diode control method of the oscillator Plural LDs 6 are series-connected and pump a solid-state pumping medium 7. Each of bypass circuits 15 is connected in parallel to an associated one of the LDs 6. An operation of driving each of the bypass circuits 15 is controlled ... | 04/20/2010 |
| 7342949 | Laser scanning device A laser scanning device includes a semiconductor laser that emits a laser beam, a laser power detector that detects laser beam power of the semiconductor laser, a reference voltage generator that generates reference voltage for controlling the laser beam power of th... | 03/11/2008 |
| 7215689 | Pulse oscillation solid-sate laser apparatus and laser machining apparatus 1. A pulse oscillating type solid laser unit that has a laser unit body whose exciting source is a laser diode that emits light in a principal energy absorbing spectrum of a solid laser activated media, and characterized by that prior to radiating laser light outsid... | 05/08/2007 |
| 7208982 | Sampling circuit A sampling circuit for compensating the phase difference of a sampling pulse due to a temperature variation to accurately sample input signals is provided. The sampling circuit samples received input signals. The sampling circuit includes a pulse generator for gener... | 04/24/2007 |
| 7142570 | Apparatus and method for generating optical carrier for microwave and millimeterwave photonics system An apparatus and a method for generating an optical carrier is disclosed. The apparatus includes: a light source generating a pump light; a SBS generator for stimulated Brillouin scattering the pump light to generate a stokes light from the light source; an attenuat... | 11/28/2006 |
| 7099074 | Side-pumping laser and optical fiber system An optical system couples laser light into an optical fiber, such as a optical amplifier fiber, from the side of the fiber by side-pumping of the fiber that is in contact with the laser such that refracted laser light is redirected into and through the fiber using d... | 08/29/2006 |
| 6996144 | Wavelength stabilization of tunable lasers by current modulation Apparatus and method for stabilizing the wavelength of a tunable laser to a target wavelength, by correspondingly adjusting the electrooptical performance of the laser's gain medium, whereby to eliminate the frequency shift due to vibrational factors. The electroopt... | 02/07/2006 |
| 6980576 | Pump distribution network for multi-amplifier modules An integrated optical device is provided for distributing optical pump energy. The device includes at least one input port for receiving optical energy, a plurality of output ports, and a user configurable optical network coupled to the input port for distributing t... | 12/27/2005 |
| 6967769 | Optical transmission systems and optical amplifiers for use therein Optical systems of the present invention generally include at least one optical amplifier having a first pump source configured to supply power to said amplifier via a first pumping paths. A second pumping path is provided to supply power to the amplifier from a sec... | 11/22/2005 |
| 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 related to the slope in a specific portion of the operating region of the p... | 06/14/2005 |
| 6822988 | Laser apparatus in which GaN-based compound surface-emitting semiconductor element is excited with GaN-based compound semiconductor laser element A laser apparatus includes a semiconductor laser element having a first active layer made of a GaN-based compound, and emitting first laser light; and a surface-emitting semiconductor element having a second active layer made of a GaN-based compound, being excited w... | 11/23/2004 |
| 6744792 | Wavelength stabilization of tunable lasers by current modulation Apparatus and method for stabilizing the wavelength of a tunable laser to a target wavelength, by correspondingly adjusting the electrooptical performance of the laser's gain medium, whereby to eliminate the frequency shift due to vibrational factors. The electroopt... | 06/01/2004 |
| 6628684 | Timing synchronization device of a pulsed laser and an optical synthesizer A timing synchronization device of a pulsed laser is composed of a first laser gain medium having a first gain region, a second laser gain medium having a second gain region that is not included in the first gain region, and first and second resonators pr... | 09/30/2003 |
| 6611374 | Optical amplifier controller having adjustable slew-rate limiter A method and apparatus is provided for controlling the optical output power from an optical amplifier arrangement. The arrangement includes a rare-earth doped fiber for imparting gain to an optical input signal propagating therethrough, a pump source for ... | 08/26/2003 |
| 6606330 | Laser drive compensation by duty cycle and power Laser printers are designed assuming the actual laser operates at nominal values which are the average or central values of a large batch of such lasers. The nominal values are determined and stored in permanent memory. Similarly, the values of the laser ... | 08/12/2003 |
| 6556343 | Optical fiber device An optical fiber amplifier or laser comprises an optical housing having a diffusive reflective inner surface and at least one opening for receiving pump light. An optical fiber having a doped core is at least partially contained within the optical housing... | 04/29/2003 |
| 6473444 | Assembly device for a laser head A laser bar assembly module having a metal base plate (20) to support a diode or a laser diodes strip (22), this base plate being provided with a groove or area (21) holding the diode or diodes strip in position, a support (24) on which the metal base pla... | 10/29/2002 |
| 6385218 | Laser processing apparatus On a "schedule" screen appearing on a display the user performs desired set value entries or action instructions on the apparatus by means of key entries. In order to set and enter a reference waveform for waveform control in particular, desired numerical... | 05/07/2002 |
| 6236668 | Semiconductor laser apparatus and pumping circuit therefor A pumping circuit for a semiconductor laser is formed by connecting a semiconductor laser in series with a positive temperature coefficient (PTC) thermistor element which has a temperature coefficient in the range between -1.5%/° C. and -0.5%/° C. withi... | 05/22/2001 |
| 6084896 | Laser light-source apparatus and method of producing light beam The present invention relates to a laser light-source apparatus and a method of producing a laser beam, and particularly to a laser light-source apparatus capable of generating intermittent pulse light having a predetermined flickering time and emphasizin... | 07/04/2000 |
| 6064682 | Delaying of laser pulses A semiconductor laser powered by both a dc current and an rf current. Varying the level of the dc current changes the shape, power and timing of a pulse emitted by the laser. The laser emits pulses in response to the leading or rising edge of the rf curre... | 05/16/2000 |
| 6061373 | Safety interlocking system for an optical fiber amplifier and pump source A safety interlocking arrangement for use with a doped fiber amplifier and its associated pump source(s). A pair of metallized jumper cables are used to interconnect the amplifier and pump source, where the physically connections to the housings are elect... | 05/09/2000 |
| 6058126 | Laser-diode-pumped solid state laser and radiation image read-out system In a laser-diode-pumped solid state laser, a solid laser crystal is pumped by a pumping laser beam emitted from a laser diode and a harmonic of light emitted from the pumped solid laser crystal is caused to make laser oscillation by a resonator structure ... | 05/02/2000 |
| 6052395 | Pulse laser A pulse laser which outputs a pulsed laser beam, comprises a delaying means which delays the timing of shift from off to on of a laser output timing signal which is turned on during the output period of the pulse laser for the time required to output one ... | 04/18/2000 |
| 5999548 | White optical pulse source and applications The present invention relates to a white pulse source that produces spectrally shaped white pulses of a constant optical output power over a wide wavelength range. The white pulse source includes a pump pulse source for generating pump pulses with a cente... | 12/07/1999 |
| 5991324 | Reliable. modular, production quality narrow-band KRF excimer laser A reliable, modular, production quality narrow-band KrF excimer laser capable of producing 10 mJ laser pulses at 1000 Hz with a bandwidth of about 0.6 pm or less. The present invention is especially suited to long-term round-the-clock operation in the lit... | 11/23/1999 |
| 5991325 | Laser beam emitting apparatus and method of driving laser light source The present invention relates to a laser beam emitting apparatus using a semiconductor laser or the like and a method of driving a laser light source. An object of the present invention is particularly to provide a laser beam emitting apparatus capable of... | 11/23/1999 |
| 5982790 | System for reducing pulse-to-pulse energy variation in a pulsed laser A system and method for reducing pulse-to-pulse energy and peak power variation in various types of pulsed lasers, and in Q-switched lasers in particular. The system of invention has a laser cavity with a lasing medium pumped by a pumping device for deliv... | 11/09/1999 |
| 5974062 | Laser drive method, laser drive system, and radiation image read-out apparatus A laser diode pumped solid state laser is provided with a first temperature control circuit which controls the temperature of the laser diode to a predetermined value and a second temperature control circuit which controls the temperature of the resonator... | 10/26/1999 |
| 5974061 | Laser pump cavity apparatus with improved thermal lensing control, cooling, and fracture strength and method A laser pump cavity apparatus with integral concentrator provides improved thermal lensing control, cooling and fracture strength. The concentrator is formed around a doped solid-state laser medium by diffusion bonding, using a material different than the... | 10/26/1999 |
| 5953354 | Laser resonator optical alignment A laser resonator includes a laser medium having opposite end faces inclined at Brewster's angle and disposed in optical alignment between spaced-apart and tilted first and second optical elements. A method for adjusting the optical alignment includes pum... | 09/14/1999 |
| 5889802 | Bias controller and method A bias controller for a semiconductor laser, for example, a laser having an light output which exhibits a threshold at a threshold value of an input drive current, is disclosed. The bias controller includes a test signal generator arranged to generate a l... | 03/30/1999 |
| 5878068 | Energy quantity control method An energy quantity control method usable with a pulse energy producing source for successively emitting energy pulses of an energy quantity variable with time, wherein a control parameter for the pulse energy producing source is adjustable to control an e... | 03/02/1999 |
| 5822345 | Diode-pumped laser system and method A laser system for imaging graphic-arts constructions avoids the need to demagnify a divergent beam by using the output of a semiconductor or diode laser to optically pump a laser crystal, which itself emits laser radiation with substantially less beam di... | 10/13/1998 |
| 5692004 | Laser adaptable to lightweight construction A laser assembly includes a lasing medium (12), associated reflector components (14, 16) defining a resonance cavity, and means (16) for outputting laser pulses therefrom. Means (18) is provided to pump the lasing medium with pulses of predetermined energ... | 11/25/1997 |
| 5500866 | Laser resonator balancing A method and apparatus for optimising the output of a multi-element laser, typically a multi-rod laser is disclosed, the method comprising obtaining a graph of power output against power input for the resonator, selecting an instability point where the ou... | 03/19/1996 |
| 5457706 | Tunable CW diode-pumped Tm,Ho:YLiF4 laser operating at or near room temperature A conversion efficiency of 42% and slope efficiency of 60% relative to absorbed pump power are obtained from a continuous wave diode-pumped Tm, Ho:YLiF4 laser at 2 μm with output power of 84 mW at a crystal temperature of 275 K. The emission s... | 10/10/1995 |
| 5440573 | Method and apparatus for controlling laser emmision wavelength using non-linear effects The present invention is generally directed to a laser, such as a soliton fiber laser, having an emission wavelength controlled by non-linear effects. Although the emission wavelength of such lasers is typically limited to the center of the gain profile, ... | 08/08/1995 |
| 5386427 | Thermally controlled lenses for lasers An apparatus and method for controlling the propagation path of a light beam are disclosed. A lens material having a temperature-dependent index of refraction is positioned in the path of the light beam. A heat source is disposed on one face of the lens m... | 01/31/1995 |
