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| Number | Title | Issue Date |
| 8184361 | Integrated spectral and all-fiber coherent beam combination A fiber laser amplifier system including a plurality of master oscillators each generating a signal beam at a different wavelength. A splitter is provided for each master oscillator that splits the signal beam into a plurality of fiber beams where a separate fiber b... | 05/22/2012 |
| 8159742 | Glass large-core optical fibers Embodiments of optical fiber may include cladding features that include a material (e.g., fluorine-doped silica glass) that may produce a very low relative refractive index difference with respect to cladding material in which the cladding features are disposed. Thi... | 04/17/2012 |
| 8154793 | Nonlinear chirped pulse fiber amplifier with pulse compression A chirped-pulse fiber amplification method and system operates with large nonlinear phase shifts (as large as ˜20π or more). In this regime, the pulse spectrum is modified by strong self-phase modulation and gain shaping. With large-enough nonlinear phase shift, s... | 04/10/2012 |
| 8149502 | Cladding-pumped evanescent gain optical fiber A cladding-pumped gain optical fiber is provided. The cladding-pumped gain optical fiber includes a core transmitting a signal light; a first cladding covering the core and having an optical-gain dopant; a second cladding covering the first cladding for transmitting... | 04/03/2012 |
| 8125704 | Systems and methods for controlling a pulsed laser by combining laser signals An ultra-short pulsed laser system comprises an optical combiner, optical amplifier, optical pulse compressor, and optical separator. The optical combiner is configured to combine a primary optical pulse with a secondary optical signal to generate a combined optical... | 02/28/2012 |
| 8125705 | Processing method for suppressing photodarkening in Yb-doped optical fibers, photodarkening-suppressed Yb-doped optical fiber, and fiber laser A processing method for suppressing photodarkening in an Yb-doped optical fiber, comprising: a first step of preparing the Yb-doped optical fiber by doping a core with Yb, and irradiating at least one of a gamma ray, a X-ray, or an electron beam onto the Yb-doped op... | 02/28/2012 |
| 8107161 | Chirped pulse fiber amplifier A short-pulse fiber amplifier system (10) is designed so that nonlinear phase shifts and third-order dispersion are purposely introduced that compensate each other. In particular, the nonlinear phase shift accumulated in the amplifier is compensated by the th... | 01/31/2012 |
| 8102594 | Methods and systems for compensation of self-phase modulation in fiber-based amplification systems Methods and systems for compensation of Self-Phase Modulation 35 in fiber-based amplifier systems 20. ... | 01/24/2012 |
| 8098424 | Optical fiber amplifying module The present invention relates to an optical fiber amplifying module equipped with a structure for stably attaining a high gain even when amplifying light having a low duty cycle. The optical fiber amplifying module comprises at least three amplification optical fibe... | 01/17/2012 |
| 8094370 | Cladding pumped fibre laser with a high degree of pump isolation An optical fibre laser or amplifier device is disclosed, comprising: a rare-earth-doped multi-clad optical fibre having at least three cladding layers, one or more multimode pump laser diodes, and a means of multiplexing a laser signal and the pumping radiation, ada... | 01/10/2012 |
| 8089689 | Apparatus and method for optical gain fiber having segments of differing core sizes Apparatus and method for amplifying laser signals using segments of fibers of differing core diameters and/or differing cladding diameters to suppress amplified spontaneous emission and non-linear effects such as four-wave mixing (FWM), self-phase modulation, and st... | 01/03/2012 |
| 8035891 | Photonic bandgap fiber A photonic bandgap fiber includes a core and a cladding that surrounds the core. In this photonic bandgap fiber, high refractive index portions which have a refractive index higher than that of a medium of the cladding are provided in the cladding so as to form a tr... | 10/11/2011 |
| 7995270 | Microchip—Yb fiber hybrid optical amplifier for micro-machining and marking The invention describes techniques for the control of the spatial as well as spectral beam quality of multi-mode fiber amplification of high peak power pulses as well as using such a configuration to replace the present diode-pumped, Neodynium based sources. Perfect... | 08/09/2011 |
| 7982945 | Optical amplification module and laser light source designed to suppress photodarkening The present invention relates to an optical amplification module having a construction which effectively suppresses photodarkening, and to a laser light source including the same. The laser light source comprises a light source for outputting light to be amplified, ... | 07/19/2011 |
| 7940453 | Fiber amplifiers and fiber lasers with reduced out-of-band gain A method of operating a fiber amplifier characterized by a spectral gain curve includes providing an input signal at a signal wavelength. The signal wavelength lies within an in-band portion of the spectral gain curve extending from a first in-band wavelength to a s... | 05/10/2011 |
| 7924500 | Micro-structured fiber profiles for mitigation of bend-loss and/or mode distortion in LMA fiber amplifiers, including dual-core embodiments An apparatus and method for compensating for mode-profile distortions caused by bending optical fibers having large mode areas. In various embodiments, the invention micro-structures the index of refraction in the core and surrounding areas of the inner cladding fro... | 04/12/2011 |
| 7907334 | High power fiber chirped pulse amplification system utilizing telecom-type components A chirped pulse amplifier (CPA) system having a mode-locked laser and a high-speed pulse selector, wherein the pulse selector modulates output pulses based upon an applied modulation voltage. A pulse selector may be an integrated electro-optic modulator, for example... | 03/15/2011 |
| 7898733 | Laser oscillator A laser oscillator includes a ring resonator. The ring resonator includes an optical circulator having first, second, third, and fourth ports and a first optical amplification fiber connected to the optical circulator. Light incident on the first port is exited from... | 03/01/2011 |
| 7880961 | Optical amplifier exhibiting net phase-mismatch selected to at least partially reduce gain-induced phase-matching during operation and method of operation An optical amplifier, such as an optical waveguide amplifier (e.g., an optical fiber amplifier or a planar waveguide) or a non-guiding optical amplifier, that exhibits a net phase-mismatch selected to at least partially reduce gain-induced phase-matching during oper... | 02/01/2011 |
| 7876495 | Apparatus and method for compensating for and using mode-profile distortions caused by bending optical fibers An apparatus and method for compensating for mode-profile distortions caused by bending optical fibers having large mode areas. In various embodiments, the invention micro-structures the index of refraction in the core and surrounding areas of the inner cladding fro... | 01/25/2011 |
| 7835068 | Photonic-crystal-rod optical amplifier with sealed-hole endcap and associated method A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some embodiments, the method and apparatus includes a photonic-crystal fiber or rod (PCF or PCR) optical device having a beam-expanding endcap... | 11/16/2010 |
| 7830596 | Fiber-or rod-based optical source featuring a large-core, rare-earth-doped photonic-crystal device for generation of narrow-bandwidth high-power pulsed radiation and associated method A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some fiber lasers and amplifiers having large cores problems exist related to energy being generated at multiple-modes (i.e., polygamy), and o... | 11/09/2010 |
| 7782527 | Multi-stage optical amplifier having photonic-crystal-rod waveguides and non-photonic-crystal optical fiber interconnects and associated method A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some fiber lasers and amplifiers having large cores problems exist related to energy being generated at multiple-modes (i.e., polygamy), and o... | 08/24/2010 |
| 7768700 | Method and apparatus for optical gain fiber having segments of differing core sizes Apparatus and method for amplifying laser signals using segments of fibers of differing core diameters and/or differing cladding diameters to suppress amplified spontaneous emission and non-linear effects such as four-wave mixing (FWM), self-phase modulation, and st... | 08/03/2010 |
| 7724422 | Method and apparatus for providing light having a selected polarization with an optical fiber Optical apparatus (110, 500, 600, 800, 1000) for providing light having a selected linear polarization having a polarization ratio, the apparatus (110, 500, 600, 800, 1000) comprising a length of optical fiber (120, 504, 604, 804, 1001) comprisi... | 05/25/2010 |
| 7688500 | Opthalmic optical coherence tomography (OCT) test station using a 1 μm fiber ASE source A phosphate glass 1-μm fiber ASE source provides high power and broadband emission that covers wavelengths on the short side of Yb-doped silica. A single-mode fiber formed from phosphate glass is doped with highly elevated concentrations of Yb dopants 0.5-30 wt. % ... | 03/30/2010 |
| 7660034 | Multi-fibre arrangement for high power fibre lasers and amplifiers An optical fiber arrangement has at least two optical fiber sections, each optical fiber section defining an outside longitudinally extending surface. The outside longitudinally extending surfaces are in optical contact with each other. The invention further provide... | 02/09/2010 |
| 7557986 | High power fiber amplifier A high power fiber amplifier including a double clad fiber including a protective outer jacket (41), an outer clad (44), an inner clad (42, 35) and a doped core (43, 34, 32), and a source of pump power coupled to the inner clad through co... | 07/07/2009 |
| 7535631 | Method and apparatus for spectral-beam combining of fiber-amplified laser beams using high-efficiency dielectric diffractive gratings Apparatus and method for spectral-beam combining light from a plurality of high-power fiber lasers that, in some embodiments, use two substantially identical diffraction gratings in a parallel, mutually compensating configuration to combine a plurality of separate p... | 05/19/2009 |
| 7532391 | Optical amplification module and laser light source designed to suppress photodarkening The present invention relates to an optical amplification module having a construction which effectively suppresses photodarkening, and to a laser light source including the same. The laser light source comprises a light source for outputting light to be amplified, ... | 05/12/2009 |
| 7492508 | Microchip—Yb fiber hybrid optical amplifier for micro-machining and marking A fiber amplifier includes at least one coreless end used for the input or extraction of optical energy. The coreless end has a transverse cross section which differs from the transverse cross section of the core at fiber locations remote from the end, so that the d... | 02/17/2009 |
| 7440175 | Multi-stage optical amplifier having photonic-crystal waveguides for generation of high-power pulsed radiation and associated method A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some fiber lasers and amplifiers having large cores problems exist related to energy being generated at multiple-modes (i.e., polygamy), and o... | 10/21/2008 |
| 7440174 | Coherent fiber diffractive optical element beam combiner An optical beam combiner and a related method for its operation, in which multiple coherent input beams are directed onto a diffractive optical element (DOE) along directions corresponding to diffraction orders of the DOE, such that the DOE generates a single output... | 10/21/2008 |
| 7436583 | Optical amplification fiber, optical amplifier module, optical communication system and optical amplifying method The present invention relates to an optical amplification fiber and others capable of effectively reducing nonlinear interaction between signal channels even in transmission of multiplexed signal light containing multiple signal channels arranged in high density and... | 10/14/2008 |
| 7437070 | Submarine observation apparatus and submarine observation system In each of a plurality of submarine observation apparatus (1 to n), a branching unit (63) branches fixed-wavelength light (λ1) from an incoming wavelength-multiplexed light signal. An observation signal modulating unit (64) modulates the... | 10/14/2008 |
| 7436585 | Chirped-pulse amplifier using photonic-crystal-rod (PCR) waveguides and associated method A method and apparatus use a photonic-crystal fiber having a very large core while maintaining a single transverse mode. In some fiber lasers and amplifiers having large cores problems exist related to energy being generated at multiple-modes (i.e., polygamy), and o... | 10/14/2008 |
| 7437083 | Wavelength converter A wavelength converter for binary optical signals includes an interferometer structure (110) for generating an output signal by modulating a received local signal (LS) according to the modulation of a fUrther received first input signal (IS 1). When su... | 10/14/2008 |
| 7436584 | Optical amplifier module housed in a factory cable joint An optical amplifier module is provided that contains at least one optical amplifier. The module includes an internal housing having an outer dimension substantially equal to an outer dimension of an internal fiber splice housing of an undersea optical fiber factory... | 10/14/2008 |
| 7417791 | Optical amplifier for amplifying multi-wavelength light Multi-wavelength light is inputted to an erbium-doped fiber as an optical amplification medium. Pump light is supplied to this erbium-doped fiber. When a transition from a state signal light on the short wavelength area in the multi-wavelength is input in the erbium... | 08/26/2008 |
| 7411727 | Method and an optical amplifier assembly for adjusting Raman gain A method of adjusting Raman gain in an optical amplifier assembly (1a). The method comprises inputting a plurality (N) of optical signals (OS) on different wavelength channels to a backward-pumped Raman active medium (4a) pumped by means ... | 08/12/2008 |
