US Patent No: 6,567,430

Number of patents in Portfolio can not be more than 2000

Raman oscillator including an intracavity filter and amplifiers utilizing same

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Abstract

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In one embodiment, a Raman oscillator includes at least one laser cavity and a distributed gain fiber positioned in the at least one laser cavity having a single spatial mode over a pumping wavelength to a signal wavelength. The oscillator also includes a coupler adapted to be coupled to a pumping mechanism to pump the distributed gain fiber at the pumping wavelength to obtain an optical signal wherein distributed gain is provided by Raman amplification over at least one cascade order corresponding to the pumping wavelength. A filter is positioned in the at least one laser cavity and has at least one pass band with a transmission peak placed approximately at the at least one cascade order to filter the optical signal to obtain a filtered optical signal having the signal wavelength. The filter has a substantially continuous sinusoidal filter function over at least one period of the filter function.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE REGENTS OF THE UNIVERSITY OF MICHIGANANN ARBOR, MI1746
XTERA COMMUNICATIONS, INC.ALLEN, TX96

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Freeman, Michael J Kings Point, NY 61 5521
Harris, Hayden H Chelsea, MI 1 9
Islam, Mohammed N Ann Arbor, MI 166 2133

Cited Art Landscape

Patent Info (Count) # Cites Year
 
LEVEL 3 COMMUNICATIONS, LLC (29)
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5,107,360 Optical transmission of RF subcarriers in adjacent signal bands 42 1990
5,134,620 Laser with longitudinal mode selection 76 1990
5,212,579 Method and apparatus for communicating amplitude modulated signals over an optical communication path 29 1991
5,166,821 Reduction of non-linear effects in optical fiber communication systems and method of using same 74 1991
5,140,456 Low noise high power optical fiber amplifier 105 1991
5,159,601 Method for producing a tunable erbium fiber laser 91 1991
5,191,586 Narrow band incoherent optical carrier generator 77 1991
5,257,124 Low distortion laser system for AM fiber optic communication 58 1991
5,151,908 Laser with longitudinal mode selection 50 1991
5,222,089 Optical signal source for overcoming distortion generated by an optical amplifier 58 1992
5,200,964 Broad linewidth lasers for optical fiber communication systems 82 1992
5,187,760 Wavelength selective coupler for high power optical communications 71 1992
5,208,819 Optical source with frequency locked to an in-fiber grating resonantor 61 1992
5,243,609 Laser with longitudinal mode selection 60 1992
5,268,910 Superluminescent optical source 66 1992
5,271,024 Optical fiber amplifier and laser with flattened gain slope 95 1992
5,283,686 Optical systems with grating reflector 136 1992
5,293,545 Optical source with reduced relative intensity noise 70 1992
5,321,707 Remote pumping for active optical devices 43 1992
5,321,543 Apparatus and method for linearizing an external optical modulator 83 1992
5,400,166 Communication of signals sharing a single optical source 60 1992
5,373,389 Method for linearizing an unbalanced Mach Zehnder optical frequency discriminator 34 1992
5,295,209 Spontaneous emission source having high spectral density at a desired wavelength 66 1992
5,416,629 Intensity modulated digital optical communications using a frequency modulated signal laser 77 1992
5,301,054 Transmission of AM-VSB video signals over an optical fiber 39 1993
5,331,449 Optical fiber tree and branch network for AM signal distribution 46 1993
5,825,520 Optical demultiplexers with grating reflectors 42 1995
 
CIENA CORPORATION (11)
5,579,143 Optical system with tunable in-fiber gratings 95 1993
5,467,212 Addressable grating modulation system for optical cable TV system 58 1994
5,557,442 Optical amplifiers with flattened gain curves 94 1994
5,659,351 Switch and insertion networks in optical cable TV system 94 1994
5,600,473 Optical amplifier systems with add/drop multiplexing 74 1995
5,504,609 WDM optical communication system with remodulators 114 1995
5,532,864 Optical monitoring channel for wavelength division multiplexed optical communication system 95 1995
5,555,118 Method for removing and inserting optical carriers in a WDM optical communication system 52 1995
5,701,186 Optical cable TV system 62 1996
5,726,784 WDM optical communication system with remodulators and diverse optical transmitters 96 1996
5,798,855 Optical monitoring channel for wavelength division multiplexed optical communication system 36 1996
 
THE REGENTS OF THE UNIVERSITY OF MICHIGAN (7)
5,541,947 Selectively triggered, high contrast laser 68 1995
6,043,927 Modulation instability wavelength converter 53 1998
6,052,393 Broadband Sagnac Raman amplifiers and cascade lasers 78 1998
6,381,391 Method and system for generating a broadband spectral continuum and continuous wave-generating system utilizing same 53 1999
6,335,820 Multi-stage optical amplifier and broadband communication system 51 1999
6,356,384 Broadband amplifier and communication system 97 2000
6,239,902 Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers 50 2000
 
AT&T Bell Laboratories (6)
5,039,199 Lightwave transmission system having remotely pumped quasi-distributed amplifying fibers 69 1989
5,078,464 Optical logic device 58 1990
5,101,456 Predistortion apparatus for optical logic device 51 1990
5,224,194 All-optical timing restoration 49 1991
5,115,488 Apparatus comprising an all-optical gate 46 1991
5,132,976 Electrically tunable fiber ring laser 35 1991
 
FURUKAWA ELECTRIC NORTH AMERICA, INC. (6)
5,218,655 Article comprising an optical waveguide with in-line refractive index grating 56 1992
5,323,404 Optical fiber laser or amplifier including high reflectivity gratings 153 1993
5,530,710 High-power pumping of three-level optical fiber laser amplifier 61 1995
5,623,508 Article comprising a counter-pumped optical fiber raman amplifier 86 1996
5,673,280 Article comprising low noise optical fiber raman amplifier 115 1996
5,815,518 Article comprising a cascaded raman fiber laser 65 1997
 
AT&T CORP. (5)
5,369,519 All-optical timing restoration 42 1993
5,389,779 Method and apparatus for near-field, scanning, optical microscopy by reflective, optical feedback 45 1993
5,521,738 Data encoded optical pulse generator 34 1994
5,473,622 Cladding-pumped MOPA structure 62 1994
5,880,866 Time division demultiplexing using selective Raman amplification 41 1996
 
JDS UNIPHASE CORPORATION (5)
5,485,481 Fibre-grating-stabilized diode laser 89 1994
5,659,559 Apparatus for generating a stabilized laser source 28 1995
5,841,797 Apparatus for stabilizing multiple laser sources and their application 50 1996
5,768,012 Apparatus and method for the high-power pumping of fiber optic amplifiers 32 1997
5,920,423 Multiple pumped fiber amplifiers for WDM communication systems with adjustment for the amplifier signal gain bandwidth 80 1997
 
Bell Telephone Laboratories, Incorporated (4)
4,995,690 Modulation instability-based fiber interferometric switch 55 1989
4,932,739 Ultra-fast optical logic devices 73 1989
5,058,974 Distributed amplification for lightwave transmission system 80 1989
5,020,050 Cascadable optical combinatorial logic gates 48 1989
 
LUCENT TECHNOLOGIES INC. (4)
5,659,644 Fiber light source with multimode fiber coupler 58 1996
5,878,071 Fabry-perot pulsed laser having a circulator-based loop reflector 22 1997
5,887,093 Optical fiber dispersion compensation 98 1997
5,847,862 Multi-channel optical fiber communication system 47 1997
 
XTERA COMMUNICATIONS, INC. (3)
6,359,725 Multi-stage optical amplifier and broadband communication system 74 1999
6,370,164 Broadband sagnac raman amplifiers and cascade lasers 46 2000
6,239,903 Nonlinear fiber amplifiers for a 1430-1530nm low-loss window in optical fibers 46 2000
 
BANDWIDWITH SOLUTIONS, INC. (2)
6,101,024 Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers 58 1998
6,374,006 Chirped period gratings for raman amplification in circulator loop cavities 66 1999
 
BRUKER NANO, INC. (2)
5,664,036 High resolution fiber optic probe for near field optical microscopy and method of making same 79 1995
5,796,909 All-fiber, high-sensitivity, near-field optical microscopy instrument employing guided wave light collector and specimen support 43 1996
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (2)
5,513,194 Stretched-pulse fiber laser 94 1995
5,617,434 Stretched-pulse fiber laser 73 1996
 
NORTEL NETWORKS LIMITED (2)
5,117,196 Optical amplifier gain control 67 1990
5,191,628 Optical amplifiers 59 1991
 
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (2)
4,964,131 Broadband optical fiber laser 30 1989
5,673,281 Solid state system for frequency conversion using raman-active media and non-linear media 46 1996
 
The United States of America as represented by the Secretary of the Navy (2)
5,050,183 Figure eight shaped coherent optical pulse source 73 1990
5,359,612 High repetition rate, mode locked, figure eight laser with extracavity feedback 49 1993
 
BANDWIDTH SOLUTIONS, INC. (1)
5,778,014 Sagnac raman amplifiers and cascade lasers 80 1996
 
CALIFORNIA INSTITUTE OF TECHNOLOGY (1)
5,504,771 Fiber-optic ring laser 37 1992
 
CORNING INCORPORATED (1)
5,689,596 Nonlinear optical loop mirror device providing pulse width switching 19 1997
 
Ditech Corporation (1)
5,861,981 Optical amplifier having dynamically shaped gain 63 1997
 
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (1)
5,734,665 Optical fiber laser 25 1996
 
FIBERCORE, LTD. (1)
5,225,925 Sensitized erbium fiber optical amplifier and source 56 1991
 
FRANCE TELECOM (1)
5,477,555 Method and device for generating optical pulses 28 1994
 
IMRA AMERICA, INC. (1)
5,450,427 Technique for the generation of optical pulses in modelocked lasers by dispersive control of the oscillation pulse width 106 1994
 
IPG PHOTONICS CORPORATION (1)
5,479,291 Non-linear optical interferometer with saturated amplifier 27 1994
 
KONINKLIJKE KPN N.V. (1)
5,295,016 Polarization insensitive amplification device 32 1992
 
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (1)
6,229,838 Electric arc furnace for the production of steel and method of operating this furnace 5 2000
 
NAUCHNY TSENTR VOLOKONNOI OPTIKI PRI INSTITUTE OBSCHEI FIZIKI ROSSIISKOI AKADEMII NAUK (1)
5,838,700 Raman fibre laser, bragg fibre-optical grating and method for changing the refraction index in germanium silicate glass 43 1997
 
NORTEL NETWORKS UK LIMITED (1)
5,542,011 Optical amplifiers 25 1994
 
NORTHROP GRUMMAN SYSTEMS CORPORATION (1)
5,757,541 Method and apparatus for an optical fiber amplifier 27 1997
 
OPTICAL TECHNOLOGIES U.S.A. CORP. (1)
5,497,386 Optical-fibre passively mode locked laser generator with non-linear polarization switching 38 1994
 
SCIENTIFIC-ATLANTA, INC. (1)
5,226,049 Optical fiber rare earth ion upconversion laser system 39 1992
 
SPECTRA-PHYSICS, INC. (1)
4,685,107 Dispersion compensated fiber Raman oscillator 49 1986
 
STC PLC (1)
4,740,974 Optical amplifiers 35 1985
 
TELSTRA CORPORATION LIMITED (1)
5,577,057 Modelocked lasers 43 1993
 
The Furukawa Electric Co., Ltd. (1)
5,883,736 Er-doped optical fiber amplifier 73 1997
 
VEECO INSTRUMENTS INC. (1)
5,485,536 Fiber optic probe for near field optical microscopy 67 1994
 
Other [Check patent profile for assignment information] (1)
4,831,616 Multiplexed fiber optics wideband data distribution system 59 1987

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
AIRBUS OPERATIONS SAS (1)
7,120,173 Method for illuminating particles for the purpose of forming their images 2 2004
 
BOOKHAM, INC. (1)
6,658,172 Optical system with 1.times.N interleaver and methods of making and using same 5 2002
 
CORNING INCORPORATED (1)
6,674,773 Multi-wavelength Raman laser 13 2002
 
NOVERA OPTICS, INC. (1)
7,843,629 Periodically filtered broadband light source 0 2007
 
SAMSUNG ELECTRONICS CO., LTD. (1)
7,236,295 Broadband light source 0 2004
 
THE REGENTS OF THE UNIVERSITY OF MICHIGAN (1)
8,036,252 Mid-infrared fiber laser using cascaded Raman wavelength shifting 1 2008
 
The United States of America as represented by the Secretary of the Navy (1)
6,937,626 Multiple wavelength pulsed source 0 2002
 
UNIVERSITY OF ARIZONA (1)
8,384,991 Saturable absorber using a fiber taper embedded in a nanostructure/polymer composite and lasers using the same 0 2010
 
UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC. (1)
7,095,772 Extreme chirped/stretched pulsed amplification and laser 18 2004

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