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| Number | Title | Issue Date |
| 6816517 | Micro-electromechanical devices for wavelength tunable lasers An arrangement for tuning a micro-electro-mechanical (MEM) laser center wavelength to exactly match the passband of its associated filter. A dither wavelength locked feedback loop dynamically adjusts the position of the MEM element, and hence the laser, wavelength, ... | 11/09/2004 |
| 6816515 | Wavelength-swept laser and method for its operation The present invention relates to a wavelength-swept laser and a method for generating laser output. The wavelength-swept pulse laser according to one aspect of the present invention uses spontaneous mode-locking to produce a pulse output with the center wavelength c... | 11/09/2004 |
| 6813306 | Solid-state laser device A solid-state laser device, comprising a first resonator arranged on a first optical axis, a second resonator arranged on a second optical axis, a first light emitter for entering an excitation light to the first resonator, a second light emitter for entering an exc... | 11/02/2004 |
| 6813302 | Eyesafe Q-switched Er-doped solid-state laser A laser device for producing laser radiation at an eyesafe wavelength from a diode-pumped solid-state laser. The device consists of three stages. The first stage is a laser diode whose output pumps the second stage. The second stage is a guided-wave laser or guided-... | 11/02/2004 |
| 6807200 | Apparatus for generating laser radiation An apparatus for generating laser radiation, the apparatus comprising: a pumping device comprising a resonant cavity; and a laser radiation generation element that is substantially Poynting vector walk-off compensated, the laser radiation generation element being lo... | 10/19/2004 |
| 6795455 | All solid-state RGB and white light generator The present invention has applications in the field of color displays, including computer monitors, video games, television, and other applications that may require a variety of light wavelengths. In one aspect of the invention, a light generator can generate light ... | 09/21/2004 |
| 6795475 | Solid-state laser apparatus excited by laser light from semiconductor laser unit having increased resonator length A semiconductor-laser-excited solid-state laser apparatus includes a solid-state laser element and a semiconductor laser unit including a resonator. The solid-state laser element is excited by light emitted from the semiconductor laser unit, and emits laser light. T... | 09/21/2004 |
| 6785307 | Method and arrangement for the self-calibration of a diode pumped solid state laser, particularly a tunable, diode pumped solid state laser A method for the self-calibration of a tunable, diode pumped solid state laser in which the frequency or the wavelength of the laser radiation of the fundamental frequency and/or doubled frequency is changed by of changing the optical cavity length by means of a pie... | 08/31/2004 |
| 6782020 | Infrared generation in semiconductor lasers Infrared generation is disclosed. A first laser field having a first frequency associated with a first interband transition is generated. A second laser field having a second frequency associated with a second interband transition is generated. The generation of the... | 08/24/2004 |
| 6782014 | Laser wavelength tripler with high quantum efficiency Method and system for converting a first light beam having a first frequency into a second light beam having a second frequency. A pump photon having (angular) frequency 3ω (or 4ω) is provided within an optical cavity, defined by two mirrors that are fully reflect... | 08/24/2004 |
| 6778582 | Coupled cavity high power semiconductor laser An active gain region sandwiched between a 100% reflective bottom. Bragg mirror and an intermediate partially reflecting Bragg mirror is formed on a lower surface of a supporting substrate, to thereby provide the first (“active”) resonator cavity of a high power... | 08/17/2004 |
| 6775447 | All fiber low noise supercontinuum source An optical fiber suitable for generation of a supercontinuum spectrum when light pulses of femtosecond (10−15 sec.) duration are launched at a certain wavelength into the fiber. The fiber includes a number of sections of highly non-linear fiber (HNLF) w... | 08/10/2004 |
| 6768576 | Temperature actuated positioning device for non-linear optical elements Improved devices, systems, and methods use a Non-Liner Optic (NLO) to effect a conversion of an input laser energy to an output energy. The output energy will have a wavelength which is different than the input energy, and the conversion will vary in response to bot... | 07/27/2004 |
| 6763042 | Apparatus and method for frequency conversion and mixing of laser light A method and device for the nonlinear combination of laser light which produces a beam of uniform intensity, high spatial purity, and high conversion efficiency. The method includes emitting a laser light from a tunable distributed feedback fiber laser having both t... | 07/13/2004 |
| 6751240 | Systems for generating short-pulse laser light A method for generating ultra-short pulse amplified Raman laser light. Short pulse laser light is amplified, and a portion thereof is introduced into a Raman oscillator to produce compressed laser light. The compressed light is introduced to a first Raman amplifier.... | 06/15/2004 |
| 6741620 | Methods and devices for efficient generation of ultraviolet light Efficient devices and methods for producing ultraviolet light are provided. One such device includes a diode-pumped 946 nanometer solid state laser, a first nonlinear crystal for generating blue light at approximately 473 nanometers, and a second nonlinear crystal f... | 05/25/2004 |
| 6738397 | Solid-state light source apparatus A solid-state light source apparatus includes a first excitation laser light source for outputting a laser beam of a first wavelength, a second excitation laser light source for outputting a laser beam of a second wavelength, a difference frequency between the laser... | 05/18/2004 |
| 6735224 | Planar lightwave circuit for conditioning tunable laser output A planar lightwave circuit (PLC) module for conditioning light output from a tunable laser designed to generate light at a target wavelength. The PLC module has a substrate; a primary waveguide embedded in said substrate, said primary waveguide having an input end f... | 05/11/2004 |
| 6728273 | Ultrashort-pulse laser machining system employing a parametric amplifier A method and apparatus are provided for increasing the energy of chirped laser pulses to an output in the range 0.001 to over 10 millijoules at a repetition rate 0.010 to 100 kHz by using a two stage optical parametric amplifier utilizing a bulk nonlinear crystal wh... | 04/27/2004 |
| 6724788 | Method and device for generating radiation with stabilized frequency A method for generating radiation with stabilized frequency, comprises the steps of providing laser light pulses with a repetition frequency fR, said pulses comprising a plurality of N frequency components fn with fn=n fR+... | 04/20/2004 |
| 6724787 | Low noise solid state laser A low noise laser includes a birefringent gain crystal arranged so that polarization is not constant within the gain crystal. The gain crystal and an intracavity optical element each have a nonzero polarization retardance. The total single-pass retardance is approxi... | 04/20/2004 |
| 6714568 | Active optical system for beam-steering a laser beam The present invention is an active optical system for beam-steering an incoming laser beam. It includes a first control optics assembly for receiving an incoming laser beam and adjusting that incoming laser beam in accordance with first desired wavelength, polarizat... | 03/30/2004 |
| 6714567 | Laser light generating apparatus and optical apparatus using the same Provided is a small-sized laser light generating apparatus capable of oscillating continuous light with a range of wavelengths of about 200 nm or less with stability at high conversion efficiency. Light with wavelength λ1 and light with wavelength λ | 03/30/2004 |
| 6710912 | Technique for quasi-phase matching A technique for achieving quasi phase matching in a photonic band gap structure comprising a first material and a second material is disclosed. In one particular exemplary embodiment, the technique may be realized by calculating a coherence length of an optical inte... | 03/23/2004 |
| 6704331 | 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 frequency at or near 1583 nm. The lasing system includes a fiber l... | 03/09/2004 |
| 6700905 | Ultrawide-band light pulse generation A method of generating light pulses in an ultrawide band ranging from the near-infrared region to the near-ultraviolet region. Fundamental sub-picosecond pulses emitted from an ultrashort pulse laser (1) are passed through a nonlinear optical material (6)... | 03/02/2004 |
| 6697395 | Sum frequency light generation method and sum frequency light generation apparatus adapatble for wide-band wavelength conversion A nonlinear optical crystal allowing type 2 phase matching multiplexes a fixed wavelength light having an angular frequency ωD and a variable wavelength light having an angular frequency ωS, with the polarization directions thereof... | 02/24/2004 |
| 6697391 | Intracavity resonantly enhanced fourth-harmonic generation using uncoated brewster surfaces An optical fourth-harmonic generation system includes a resonant cavity configured to support electromagnetic radiation of a fundamental frequency and a fourth-harmonic generator disposed within the resonant cavity produces electromagnetic radiation of a ... | 02/24/2004 |
| 6690691 | Laser oscillation apparatus A laser oscillation apparatus, comprising a laser beam emitting unit for emitting an excitation light, an optical resonance unit at least having a laser crystal and an output mirror, a nonlinear optical medium which is placed in the optical resonance unit... | 02/10/2004 |
| 6683894 | Tunable IR laser source for MALDI A diode pumped solid state laser/OPO system widely tunable in mid infrared spectrum for infrared matrix assisted laser desorption/ionization (MALDI) mass spectroscopy is disclosed. Up to a few tens of milli-Joule, short pulse, tunable near infrared laser ... | 01/27/2004 |
| 6680956 | External frequency conversion of surface-emitting diode lasers Methods and devices are provided for converting a fundamental wavelength of a fundamental beam generated by a surface-emitting diode laser having a first resonating cavity. According to some embodiments, a first nonlinear crystal disposed in a second reso... | 01/20/2004 |
| 6671297 | Wavelength conversion device A wavelength conversion device that converts a wavelength by second harmonic-wave generation and generates a laser beam, includes: a substrate having a plurality of electrodes; a semiconductor laser device mounted on the substrate and electrically connect... | 12/30/2003 |
| 6658029 | Laser beam-generating apparatus A deep-ultraviolet violet laser beam which is a harmonic and is generated inside a nonlinear optical element (101) is emitted outside the nonlinear optical element (101), being spaced from a green laser beam, which is a fundamental wave. The green laser b... | 12/02/2003 |
| 6654392 | Quasi-monolithic tunable optical resonator An optical resonator has a piezoelectric element attached to a quasi-monolithic structure. The quasi-monolithic structure defines an optical path. Mirrors attached to the structure deflect light along the optical path. The piezoelectric element controllab... | 11/25/2003 |
| 6647034 | Method to improve optical parametric oscillator beam quality A method to improving optical parametric oscillator (OPO) beam quality having an optical pump, which generates a pump beam at a pump frequency greater than a desired signal frequency, a nonlinear optical medium oriented so that a signal wave at the desire... | 11/11/2003 |
| 6647033 | Optical parametric osicllators with improved beam quality An optical parametric oscillator (OPO) having an optical pump, which generates a pump beam at a pump frequency greater than a desired signal frequency, a nonlinear optical medium oriented so that a signal wave at the desired signal frequency and a corresp... | 11/11/2003 |
| 6639921 | System and method for providing collimated electromagnetic energy in the 8--12 micron range A novel and efficient system and method for providing an output beam of collimated energy in the 8-12 micron range. The solid state system includes a pump laser (210) for providing an input beam and an OPO (250) using an x-cut potassium titanyl arsenate c... | 10/28/2003 |
| 6636537 | Laser apparatus A laser apparatus capable of emitting laser beams of a plurality of different wavelengths is disclosed. This apparatus includes an exciting light source, a solid-state laser medium which emits light of a plurality of peak wavelengths by light from the exc... | 10/21/2003 |
| 6590911 | Passively modelocked harmonic-generating laser A laser includes a resonator terminated by first and second mirrors and including a gain medium providing fundamental radiation. A first optically-nonlinear element is located in the resonator. The first optically-nonlinear element is cooperatively arrang... | 07/08/2003 |
| 6570897 | Wavelength conversion apparatus using semiconductor optical amplifying element for laser oscillation A wavelength conversion apparatus contains a semiconductor laser device as an excitation light source, a semiconductor optical amplifying element, a resonator formed by the optical amplifying element and a mirror arranged outside the optical amplifying el... | 05/27/2003 |
