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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address	Total Patents
THE REGENTS OF THE UNIVERSITY OF MICHIGAN	ANN ARBOR, MI	1566

International Classification(s)

• H01S:DEVICES USING STIMULATED EMISSION

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Islam, Mohammed N	Allen, TX	139	3060

Cited Art Landscape

Patent Info	(Count)	# Cites	Year
Other [Check patent profile for assignment information] (1)
4831616 Multiplexed fiber optics wideband data distribution system		59	1987
TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC (1)
6414786 Method and apparatus for reducing polarization dependent gain in Raman amplification		32	2000
LEVEL 3 COMMUNICATIONS, LLC (30)
5210631 Transmission of AM-VSB video signals over an optical fiber		50	1989
5153762 Method and apparatus for recovering AM channell signals distributed on an optical fiber		45	1990
5107360 Optical transmission of RF subcarriers in adjacent signal bands		43	1990
5134620 Laser with longitudinal mode selection		91	1990
5212579 Method and apparatus for communicating amplitude modulated signals over an optical communication path		30	1991
5166821 Reduction of non-linear effects in optical fiber communication systems and method of using same		77	1991
5140456 Low noise high power optical fiber amplifier		106	1991
5159601 Method for producing a tunable erbium fiber laser		96	1991
5191586 Narrow band incoherent optical carrier generator		78	1991
5257124 Low distortion laser system for AM fiber optic communication		60	1991
5151908 Laser with longitudinal mode selection		51	1991
5222089 Optical signal source for overcoming distortion generated by an optical amplifier		65	1992
5200964 Broad linewidth lasers for optical fiber communication systems		85	1992
5187760 Wavelength selective coupler for high power optical communications		75	1992
5208819 Optical source with frequency locked to an in-fiber grating resonantor		62	1992
5243609 Laser with longitudinal mode selection		60	1992
5268910 Superluminescent optical source		67	1992
5271024 Optical fiber amplifier and laser with flattened gain slope		97	1992
5283686 Optical systems with grating reflector		137	1992
5293545 Optical source with reduced relative intensity noise		72	1992
5321707 Remote pumping for active optical devices		43	1992
5321543 Apparatus and method for linearizing an external optical modulator		87	1992
5400166 Communication of signals sharing a single optical source		68	1992
5373389 Method for linearizing an unbalanced Mach Zehnder optical frequency discriminator		35	1992
5295209 Spontaneous emission source having high spectral density at a desired wavelength		70	1992
5416629 Intensity modulated digital optical communications using a frequency modulated signal laser		80	1992
5301054 Transmission of AM-VSB video signals over an optical fiber		39	1993
5331449 Optical fiber tree and branch network for AM signal distribution		53	1993
5825520 Optical demultiplexers with grating reflectors		44	1995
6356383 Optical transmission systems including optical amplifiers apparatuses and methods		68	2000
BANDWIDWITH SOLUTIONS, INC. (2)
6101024 Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers		63	1998
6374006 Chirped period gratings for raman amplification in circulator loop cavities		82	1999
STC, plc (1)
4740974 Optical amplifiers		35	1985
FURUKAWA ELECTRIC NORTH AMERICA, INC. (7)
5218655 Article comprising an optical waveguide with in-line refractive index grating		70	1992
5323404 Optical fiber laser or amplifier including high reflectivity gratings		183	1993
5530710 High-power pumping of three-level optical fiber laser amplifier		62	1995
5623508 Article comprising a counter-pumped optical fiber raman amplifier		86	1996
5673280 Article comprising low noise optical fiber raman amplifier		116	1996
5815518 Article comprising a cascaded raman fiber laser		68	1997
* 5905838 Dual window WDM optical fiber communication		100	1998
KDDI CORPORATION (1)
5629795 Optical amplifying-repeating transmission system		31	1995
TYCO SUBMARINE SYSTEMS LTD. (1)
6081366 Optical fiber communication system with a distributed Raman amplifier and a remotely pumped er-doped fiber amplifier		89	1997
XTERA COMMUNICATIONS, INC. (3)
6359725 Multi-stage optical amplifier and broadband communication system		77	1999
6370164 Broadband sagnac raman amplifiers and cascade lasers		46	2000
6239903 Nonlinear fiber amplifiers for a 1430-1530nm low-loss window in optical fibers		47	2000
OPTICAL TECHNOLOGIES U.S.A. CORP. (1)
5497386 Optical-fibre passively mode locked laser generator with non-linear polarization switching		39	1994
TYCO TELECOMMUNICATIONS (US) INC. (2)
6320884 Wide bandwidth Raman amplifier employing a pump unit generating a plurality of wavelengths		60	1998
* 6151160 Broadband Raman pre-amplifier for wavelength division multiplexed optical communication systems		96	1998
KABUSHIKI KAISHA TOSHIBA (1)
6081355 Multi-wavelength light source		34	1997
BELL TELEPHONE LABORATORIES, INCORPORATED (5)
4881790 Optical communications system comprising raman amplification means		83	1988
4995690 Modulation instability-based fiber interferometric switch		55	1989
4932739 Ultra-fast optical logic devices		73	1989
5058974 Distributed amplification for lightwave transmission system		80	1989
5020050 Cascadable optical combinatorial logic gates		48	1989
NEPTUNE SUBSEA IP LIMITED (1)
5778014 Sagnac raman amplifiers and cascade lasers		84	1996
BRUKER NANO, INC. (2)
5664036 High resolution fiber optic probe for near field optical microscopy and method of making same		82	1995
5796909 All-fiber, high-sensitivity, near-field optical microscopy instrument employing guided wave light collector and specimen support		43	1996
NAUCHNY TSENTR VOLOKONNOI OPTIKI PRI INSTITUTE OBSCHEI FIZIKI ROSSIISKOI AKADEMII NAUK (1)
5838700 Raman fibre laser, bragg fibre-optical grating and method for changing the refraction index in germanium silicate glass		45	1997
NORTHROP GRUMMAN SYSTEMS CORPORATION (1)
5757541 Method and apparatus for an optical fiber amplifier		28	1997
Ditech Corporation (1)
5861981 Optical amplifier having dynamically shaped gain		66	1997
PIRELLI SUBMARINE TELECOM SYSTEMS ITALIA S.P.A. (1)
6191854 Optical telecommunications system		34	1998
VEECO INSTRUMENTS INC. (1)
5485536 Fiber optic probe for near field optical microscopy		67	1994
LUCENT TECHNOLOGIES INC. (8)
5559920 Dispersion compensation in optical fiber communications		68	1995
* 5959750 Method of upgrading transmission capacity by Raman amplification		130	1996
5659644 Fiber light source with multimode fiber coupler		66	1996
6191877 WDM optical fiber system using Raman amplification		52	1996
5878071 Fabry-perot pulsed laser having a circulator-based loop reflector		22	1997
* 5887093 Optical fiber dispersion compensation		101	1997
5847862 Multi-channel optical fiber communication system		47	1997
6147794 Raman amplifier with pump source for improved performance		68	1999
McDonnell Douglas Corporation (1)
5790300 Multi-channel fiber amplification system and associated method		24	1996
CISCO TECHNOLOGY, INC. (2)
5226049 Optical fiber rare earth ion upconversion laser system		49	1992
6437906 All-optical gain controlled L-band EDFA structure with reduced four-wave mixing cross-talk		38	2000
FUJITSU LIMITED (2)
5798853 Optical communication system compensating for chromatic dispersion and phase conjugate light generator for use therewith		87	1996
6219176 Method for gain equalization, and device and system for use in carrying out the method		41	1998
SPECTRA-PHYSICS, INC. (1)
4685107 Dispersion compensated fiber Raman oscillator		51	1986
II-VI INCORPORATED (1)
* 6310716 Amplifier system with a discrete Raman fiber amplifier module		63	2000
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (2)
6236496 Optical fiber amplifier and optical amplification method		28	1997
* 6263139 Optical transmission system with group velocity dispersion compensation		50	1999
The United States of America as represented by the Secretary of the Navy (2)
5050183 Figure eight shaped coherent optical pulse source		81	1990
5359612 High repetition rate, mode locked, figure eight laser with extracavity feedback		62	1993
FIBERCORE LIMITED (1)
5225925 Sensitized erbium fiber optical amplifier and source		59	1991
NORTEL NETWORKS UK LIMITED (1)
5542011 Optical amplifiers		25	1994
NORTEL NETWORKS LIMITED (2)
5117196 Optical amplifier gain control		67	1990
5191628 Optical amplifiers		73	1991
CALIFORNIA INSTITUTE OF TECHNOLOGY (1)
5504771 Fiber-optic ring laser		37	1992
JDS UNIPHASE CORPORATION (3)
5485481 Fibre-grating-stabilized diode laser		90	1994
5659559 Apparatus for generating a stabilized laser source		29	1995
5841797 Apparatus for stabilizing multiple laser sources and their application		60	1996
CORNING INCORPORATED (1)
* 6404964 Dispersion managed optical waveguide and system with distributed amplification		52	2000
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (2)
5513194 Stretched-pulse fiber laser		111	1995
5617434 Stretched-pulse fiber laser		86	1996
AT&T Bell Laboratories (6)
5039199 Lightwave transmission system having remotely pumped quasi-distributed amplifying fibers		69	1989
5078464 Optical logic device		58	1990
5101456 Predistortion apparatus for optical logic device		51	1990
5224194 All-optical timing restoration		49	1991
5115488 Apparatus comprising an all-optical gate		46	1991
5132976 Electrically tunable fiber ring laser		35	1991
IMRA AMERICA, INC. (1)
5450427 Technique for the generation of optical pulses in modelocked lasers by dispersive control of the oscillation pulse width		128	1994
Telstra Corporation Limited (1)
5577057 Modelocked lasers		44	1993
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (1)
5734665 Optical fiber laser		26	1996
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (1)
6104733 Multi-stage optical fiber amplifier having high conversion efficiency		22	1998
THE REGENTS OF THE UNIVERSITY OF MICHIGAN (7)
5541947 Selectively triggered, high contrast laser		83	1995
6043927 Modulation instability wavelength converter		69	1998
6052393 Broadband Sagnac Raman amplifiers and cascade lasers		84	1998
6381391 Method and system for generating a broadband spectral continuum and continuous wave-generating system utilizing same		74	1999
6335820 Multi-stage optical amplifier and broadband communication system		51	1999
* 6356384 Broadband amplifier and communication system		100	2000
6239902 Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers		50	2000
FRANCE TELECOM ETABLISSEMENT AUTONOME DE DROIT PUBLIC (1)
5477555 Method and device for generating optical pulses		28	1994
VERIZON PATENT AND LICENSING INC. (1)
* 5978130 Dual-band fiber optic amplification system using a single pump source		38	1997
KONINKLIJKE PTT NEDERLAND N.V. (1)
5295016 Polarization insensitive amplification device		33	1992
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (2)
4952059 Reentrant fiber raman gyroscope		22	1988
5673281 Solid state system for frequency conversion using raman-active media and non-linear media		52	1996
CIENA CORPORATION (11)
5579143 Optical system with tunable in-fiber gratings		105	1993
5467212 Addressable grating modulation system for optical cable TV system		60	1994
5557442 Optical amplifiers with flattened gain curves		94	1994
5659351 Switch and insertion networks in optical cable TV system		98	1994
5600473 Optical amplifier systems with add/drop multiplexing		74	1995
5504609 WDM optical communication system with remodulators		116	1995
5532864 Optical monitoring channel for wavelength division multiplexed optical communication system		100	1995
5555118 Method for removing and inserting optical carriers in a WDM optical communication system		52	1995
5701186 Optical cable TV system		62	1996
5726784 WDM optical communication system with remodulators and diverse optical transmitters		101	1996
5798855 Optical monitoring channel for wavelength division multiplexed optical communication system		37	1996
ALCATEL LUCENT (1)
6088152 Optical amplifier arranged to offset Raman gain		94	1999
IPG PHOTONICS CORPORATION (1)
5479291 Non-linear optical interferometer with saturated amplifier		27	1994
LUMENTUM OPERATIONS LLC (3)
5768012 Apparatus and method for the high-power pumping of fiber optic amplifiers		32	1997
6008933 Multiple stage optical fiber amplifier		24	1997
5920423 Multiple pumped fiber amplifiers for WDM communication systems with adjustment for the amplifier signal gain bandwidth		81	1997
OPLINK TECHNOLOGY, INC. (1)
5883736 Er-doped optical fiber amplifier		74	1997
F. POSZAT HU, L.L.C. (1)
* 6417959 Raman fiber amplifier		49	2001
AT&T CORP. (5)
5369519 All-optical timing restoration		42	1993
5389779 Method and apparatus for near-field, scanning, optical microscopy by reflective, optical feedback		48	1993
5521738 Data encoded optical pulse generator		34	1994
5473622 Cladding-pumped MOPA structure		65	1994
5880866 Time division demultiplexing using selective Raman amplification		41	1996

* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info	(Count)	# Cites	Year
Other [Check patent profile for assignment information] (1)
* 2014/0270,634 MULTI- PURPOSE APPARATUS FOR SWITCHING, AMPLIFYING, REPLICATING, AND MONITORING OPTICAL SIGNALS ON A MULTIPLICITY OF OPTICAL FIBERS		1	2014
ARRIS ENTERPRISES LLC (2)
* 7196840 Amplitude balancing for multilevel signal transmission		1	2002
* 2003/0147,127 Amplitude balancing for multilevel signal transmission		0	2002
SAMSUNG ELECTRONICS CO., LTD. (2)
* 7280719 Wideband optical module and PON using the same		0	2005
* 2006/0029,393 Wideband optical module and PON using the same		0	2005
FUJITSU LIMITED (1)
* 7372622 Optical transmission system, optical repeater, and optical transmission method		0	2006
NEPTUNE SUBSEA IP LIMITED (4)
7254341 System and method for dispersion compensation in an optical communication system		1	2006
* 2006/0188,263 System and Method for Dispersion Compensation in an Optical Communication System		2	2006
7974002 System and method for managing system margin		2	2007
* 2007/0188,851 System and Method for Managing System Margin		1	2007

* Cited By Examiner

Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

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DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
June 17, 2003	US,6580548,B2   US6580548B2	GRANTED PATENT AS SECOND PUBLICATION
May 09, 2002	US,20020054427,A1   US20020054427A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 6580548

Broadband amplifier and communication system

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