| Patent Number |
Title Of Patent |
Date Issued |
| RE37354 |
Semiconductor laser with integral spatial mode filter |
September 4, 2001 |
| A semiconductor laser having a light amplifying diode heterostructure with a flared gain region in an external resonant cavity. The flared gain region has a narrow aperture end which may be coupled to a single mode waveguide and a wide output end. A light emitting surface of the hete |
| RE37051 |
Semiconductor gain medium with multimode and single mode regions |
February 13, 2001 |
| A semiconductor gain medium has an optical cavity comprising a multimode region permitting propagation of light with a diverging phase front and a single mode region. An optical cavity is formed by optical feedback within the medium. Preferably, the feedback comprises a combination of a |
| RE36802 |
Transverse electric (TE) polarization mode AlGaInP/GaAs red laser diodes, especially with self-p |
August 1, 2000 |
| An AlGaInP/GaAs laser diode is disclosed in which the active region is made up of quantum wells that are sufficiently thin (less than 5 nm thick) that the transition energy increase due to quantum confinement of the carriers becomes significant. This allows the quantum well material comp |
| RE35215 |
Frequency converted laser diode and lens system therefor |
April 23, 1996 |
| A compact semiconductor laser light source providing short wavelength (ultraviolet, blue or green) coherent light by means of frequency doubling of red or infrared light from a high power diode heterostructure. The high power diode heterostructure is a MOPA device having a single mode la |
| 6411323 |
High power marking system achieved through power scaling via multiplexing |
June 25, 2002 |
| Power scaling by multiplexing multiple fiber gain sources with different wave-lengths is useful in printing applications requiring higher optical powers to perform the printing function, such as through thermal inducement in thermal ablation, thermal fusion, thermal diffusion or ther |
| 6407855 |
Multiple wavelength optical sources |
June 18, 2002 |
| Optical pumping arrangements are provided for the broadband or multiple wavelength pumping of optical sources. Sources may be based on Raman gain media and may use multiple output couplers to couple out different wavelength ranges. Cascaded Raman resonator (CRR) configurations may also |
| 6404542 |
Multiple emitter semiconductor laser pump source for scaling of pump power and generation of unp |
June 11, 2002 |
| A pump source for rare earth and Raman amplifiers or for distributed amplification uses two or more light sources to generate two source beams that are combined by a beam combiner to form the output pump beam. In accordance with one embodiment, the light sources are a diode laser array |
| 6388806 |
Upgradable, gain flattened fiber amplifiers for WDM applications |
May 14, 2002 |
| A multistage optical fiber amplifier (OFA) system is designed to be upgraded with the addition of pump power when signal capacity of an optical communication link is correspondingly increased. The system includes a gain flattening filter (GFF) that remains valid when the system is up |
| 6367335 |
Strain sensor for optical fibers |
April 9, 2002 |
| A strain sensor is disclosed for example for use in a Bragg fiber grating, in which piezoelectric actuators are arranged to compress or extend the fiber, and a capacitance micrometer for measuring the strain on the fiber in a servo loop with the actuators to provide a tunable grating in |
| 6356574 |
High power, reliable optical fiber pumping system with high redundancy for use in lightwave comm |
March 12, 2002 |
| A multistage optical amplifier pumping system with built-in redundant reliability for lightwave communication system provides plural levels of redundancy. A first level of redundancy deals with redundancy in the form of plural primary laser diode sources for pumping a single fiber laser |
| 6353499 |
Optical fiber amplifier with oscillating pump energy |
March 5, 2002 |
| An optical fiber amplifier has an amplification stage that uses an optical fiber pumped with pump energy of a first wavelength that oscillates through the gain medium. In one embodiment, the pumping is essentially a cavity resonator that is coupled to either end of the optical fiber such |
| 6347100 |
Short wavelength fiber laser |
February 12, 2002 |
| A fiber laser uses a mechanism to prevent a thermally induced shift of the gain spectrum to a range that causes the laser to become destabilized when operated at a first signal wavelength. By establishing a nominal gain spectrum that is further from the undesired range than in a conventi |
| 6347007 |
Semiconductor laser high power amplifier system |
February 12, 2002 |
| A high power laser optical amplifier system for material processing comprises multiple stage fiber amplifiers with rejection of propagating ASE buildup in and between the amplifier stages as well as elimination of SBS noise providing output powers in the range of about 10 .mu.J to about |
| 6345141 |
Double-clad optical fiber with improved inner cladding geometry |
February 5, 2002 |
| A double-clad optical fiber has an inner cladding that has a torsional stress induced within it during manufacture. By rotating the fiber preform before curing of the inner cladding layer, a physical stress may be permanently imparted to the inner cladding that interacts with pump energy |
| 6335941 |
Semiconductor laser highpower amplifier system |
January 1, 2002 |
| A high power laser optical amplifier system for material processing comprises multiple stage fiber amplifiers with rejection of propagating ASE buildup in and between the amplifier stages as well as elimination of SBS noise providing output powers in the range of about 10 .mu.J to about |
| 6330257 |
Polarization-insensitive laser stabilization using multiple waveguide gratings |
December 11, 2001 |
| The effectiveness of reflected light to stabilize the operational characteristics of a semiconductor diode laser varies with the polarization orientation of the reflected light. Stabilization failure can occur if the polarization orientation of the reflected light is orthogonal to th |
| 6304585 |
Frequency conversion system |
October 16, 2001 |
| Laser diode pumped mid-IR wavelength sources include at least one high power, near-IR wavelength, injection and/or sources wherein one or both of such sources may be tunable providing a pump wave output beam to a quasi-phase matched (QPM) nonlinear frequency mixing (NFM) device. The NFM |
| 6301273 |
Power enhanced frequency conversion system |
October 9, 2001 |
| A frequency conversion system includes at least one source providing a first near-IR wavelength output including a gain medium for providing high power amplification, such as double clad fiber amplifier, a double clad fiber laser or a semiconductor tapered amplifier to enhance the power |
| 6301272 |
Resonant pumped short cavity fiber laser with optical feedback stabilization |
October 9, 2001 |
| A fiber laser or fiber amplifier uses resonant pumping of the gain medium by providing a pump resonator that establishes a resonator cavity at the pump wavelength which includes the pumped gain medium. The pump resonator may be of a distributed feedback (DFB) or a distributed Bragg refle |
| 6301271 |
Frequency conversion system |
October 9, 2001 |
| A frequency conversion system comprises first and second gain sources providing first and second frequency radiation outputs where the second gain source receives as input the output of the first gain source and, further, the second gain source comprises a Raman or Brillouin gain fiber |
| 6298187 |
High power fiber gain media system achieved through power scaling via multiplexing |
October 2, 2001 |
| Power scaling by multiplexing multiple fiber gain sources with different wavelengths, pulsing or polarization modes of operation is achieved through multiplex combining of the multiple fiber gain sources to provide high power outputs, such as ranging from tens of watts to hundreds of |
| 6297903 |
Multiple stage optical fiber amplifier and signal generator |
October 2, 2001 |
| An optical amplifier makes use of a co-propagating fiber amplifier stage and a counter propagating fiber amplifier stage. One of the stages is preferably a low noise stage, while the other is a high gain stage, typically the output stage. The low noise stage may have a small core fib |
| 6295304 |
Resonant pumped short cavity fiber laser with multiple optical resonators |
September 25, 2001 |
| A fiber laser or fiber amplifier uses resonant pumping of the gain medium by providing a pump resonator that establishes a resonator cavity at the pump wavelength which includes the pumped gain medium. The pump resonator may be of a distributed feedback (DFB) or a distributed Bragg refle |
| 6282016 |
Polarization maintaining fiber lasers and amplifiers |
August 28, 2001 |
| A number of variations are provided of a device that provides an amplified single polarization optical signal. Each of these relies on the use of a non-polarization maintaining gain medium through which the signal is directed, and a polarization shifter and reflector that direct the sign |
| 6275632 |
High power fiber gain media system achieved through power scaling via multiplexing |
August 14, 2001 |
| Power scaling by multiplexing multiple fiber gain sources with different wavelengths, pulsing or polarization modes of operation is achieved through multiplex combining of the multiple fiber gain sources to provide high power outputs, such as ranging from tens of watts to hundreds of |
| 6275250 |
Fiber gain medium marking system pumped or seeded by a modulated laser diode source and method o |
August 14, 2001 |
| Double clad fiber gain medium systems particularly adapted for marking indicia on surfaces of articles are disclosed. These systems provide a modulated output from a pump or seed semiconductor laser source to a double clad fiber gain medium which provides an amplified marking output |
| 6272162 |
Visible wavelength, semiconductor optoelectronic device with a high power broad, significantly l |
August 7, 2001 |
| A Group III-V semiconductor optoelectronic device provides for visible wavelength light output having a more laterally uniform, high power beam profile, albeit still quasi-Gaussian. A number of factors contribute to the enhanced profile including an improvement in reducing band offset of |
| 6266355 |
Group III-V nitride laser devices with cladding layers to suppress defects such as cracking |
July 24, 2001 |
| A Group III-V nitride compound semiconductor light emitting device is constructed without the employing homogeneous layers of AlGaN. Instead of homogeneous AlGaN cladding layers, GaN cladding layers are utilized. Since high temperature growths that accompany the formation of AlGaN layers |
| 6259842 |
Monitoring system for a high power light source |
July 10, 2001 |
| A monitoring apparatus for a high power light source comprises a fiber medium containing a high power output for an application with a first monitoring tap optically coupled to the fiber medium for removing a small portion of light from the output to monitor the output power level. A |
| 6240119 |
Apparatus for providing a stabilized laser source |
May 29, 2001 |
| Apparatus is provided for an improved stabilized laser source comprising a laser source having a light beam output and an electrical input. An optical waveguide, such as an optical fiber, having an input end is optically coupled to the laser source to receive the light beam. A reflec |
| 6240116 |
Laser diode array assemblies with optimized brightness conservation |
May 29, 2001 |
| The invention relates to laser diode arrays having high beam quality and high beam brightness. In one approach, a laser diode array package includes a mount and first and second laser diode arrays disposed on the mount. Each of the laser diode arrays defines an optical axis and has an |
| 6236498 |
Upgradable, gain flattened fiber amplifiers for WDM applications |
May 22, 2001 |
| A multistage optical fiber amplifier (OFA) system is designed to be upgraded with the addition of pump power when signal capacity of an optical communication link is correspondingly increased. The system includes a gain flattening filter (GFF) that remains valid when the system is up |
| 6233259 |
Fiber grating stabilized diode laser |
May 15, 2001 |
| A fiber Bragg grating is used to stabilize the intensity and frequency fluctuations of a diode laser. The diode laser is connected with an opto-mechanical apparatus to the fiber which contains the grating. The grating is formed in the guided-mode region of the optical fiber. The wave |
| 6229828 |
High power pumped MID-IR wavelength devices using nonlinear frequency mixing (NFM) |
May 8, 2001 |
| Laser diode pumped mid-IR wavelength sources include at least one high power, near-IR wavelength, injection and/or sources wherein one or both of such sources may be tunable providing a pump wave output beam to a quasi-phase matched (QPM) nonlinear frequency mixing (NFM) device. The NFM |
| 6222864 |
High brightness laser diode source |
April 24, 2001 |
| Coherent light sources combining a semiconductor optical source with a light diverging region, such as a flared resonator type laser diode or flared amplifier type MOPA, with a single lens adapted to correct the astigmatism of the light beam emitted from the source is disclosed. The |
| 6215809 |
Stabilization of laser sources with closely-coupled optical reflectors using an internal dither |
April 10, 2001 |
| Apparatus for providing a laser source optically coupled to an optical waveguide, such as an optical fiber, having a reflective grating positioned from the output facet of the laser source a distance equal to or greater than the coherence length of the laser source providing a portio |
| 6212310 |
High power fiber gain media system achieved through power scaling via multiplexing |
April 3, 2001 |
| Power scaling by multiplexing multiple fiber gain sources with different wavelengths, pulsing or polarization modes of operation is achieved through multiplex combining of the multiple fiber gain sources to provide high power outputs, such as ranging from tens of watts to hundreds of |
| 6192713 |
Apparatus for the manufacture of glass preforms |
February 27, 2001 |
| A method and apparatus is disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenu |
| 6185230 |
Resonant pumped short cavity fiber laser |
February 6, 2001 |
| A fiber laser or fiber amplifier uses resonant pumping of the gain medium by providing a pump resonator that establishes a resonator cavity at the pump wavelength which includes the pumped gain medium. The pump resonator may be of a distributed feedback (DFB) or a distributed Bragg refle |
| 6181721 |
Visible wavelength, semiconductor optoelectronic device with a high power broad, significantly l |
January 30, 2001 |
| A Group III-V semiconductor optoelectronic device provides for visible wavelength light output having a more laterally uniform, high power beam profile, albeit still quasi-Gaussian. A number of factors contribute to the enhanced profile including an improvement in reducing band offset of |
| 6181465 |
Optical fiber gain medium with wavelength selective core filter |
January 30, 2001 |
| An optical fiber used as the active amplifying medium in a fiber laser is arranged to have a high insertion loss at an undesired frequency, while retaining a low insertion loss at a desired lasing frequency. In one embodiment, loss at a Raman-shifted frequency is introduced by using an |
| 6174748 |
Method of forming a tapered section in a semiconductor device to provide for reproducible mode p |
January 16, 2001 |
| A method for fabricating a high power laser diode device with an output emission with a nearly circular mode profile for efficient coupling into an optical fiber. A vertical taper waveguide and a window tolerance region are formed in a base structure of the device employing successive et |
| 6167075 |
High power, reliable optical fiber pumping system with high redundancy for use in lightwave comm |
December 26, 2000 |
| An optical amplifier pumping system with built-in redundant reliability for lightwave communication system provides plural levels of redundancy. A first level of redundancy deals with redundancy in the form of plural primary laser diode sources in the lightwave communication system. A |
| 6160568 |
Laser marking system and method of energy control |
December 12, 2000 |
| A laser marking system comprises a high power fiber laser consisting of a double clad fiber having a doped core surrounded by an inner pump cladding and providing an optical output for marking; a high power laser diode source for pumping the double clad fiber laser via an input into the |
| 6157763 |
Double-clad optical fiber with improved inner cladding geometry |
December 5, 2000 |
| A double-clad optical fiber has an inner cladding with a cross-sectional shape that is non-circular, but that maintains a good end-coupling profile. The cross-sectional shape of the inner cladding is such that two perpendicular distances across the shape, each of which passes through a |
| 6152588 |
Addressable vehicular lighting system |
November 28, 2000 |
| A vehicle with a plurality of individually addressable light sources, preferably semiconductor laser light sources or light emitting diodes, each of which produce a beam of light, are optically coupled to a fiber optic waveguide. The laser light sources are grouped together preferably |
| 6151338 |
High power laser optical amplifier system |
November 21, 2000 |
| A high power laser optical amplifier system for material processing comprises multiple stage fiber amplifiers with rejection of propagating ASE buildup in and between the amplifier stages as well as elimination of SBS noise providing output powers in the range of about 10 .mu.J to about |
| 6148014 |
Visible wavelength semiconductor optoelectronic device with a high power broad, significantly la |
November 14, 2000 |
| A Group III-V semiconductor optoelectronic device provides for visible wavelength light output having a more laterally uniform, high power beam profile, albeit still quasi-Gaussian. A number of factors contribute to the enhanced profile including an improvement in reducing band offset of |
| 6148013 |
Visible wavelength, semiconductor optoelectronic device with a high power broad, significantly l |
November 14, 2000 |
| A Group III-V semiconductor optoelectronic device provides for visible wavelength light output having a more laterally uniform, high power beam profile, albeit still quasi-Gaussian. A number of factors contribute to the enhanced profile including an improvement in reducing band offset of |
| 6130147 |
Methods for forming group III-V arsenide-nitride semiconductor materials |
October 10, 2000 |
| Methods are disclosed for forming Group III--arsenide-nitride semiconductor materials. Group III elements are combined with group V elements, including at least nitrogen and arsenic, in concentrations chosen to lattice match commercially available crystalline substrates. Epitaxial gr |
