US Patent No: 6,580,548
Number of patents in Portfolio can not be more than 2000
Broadband amplifier and communication system
ALSO PUBLISHED AS:
20020054427
Stats
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Jun 17, 2003
Issued date -
Oct 30, 2001
filing date -
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10/003,199
serial no -
In Force
status (Note)
Importance
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Abstract
A method of broadband amplification divides an optical signal of wavelength of 1430 nm to 1620 nm at a preselected wavelength into a first beam and a second beam. The first beam is directed to at least one optical amplifier and produces an amplified first beam. The second beam is directed to at least one rare earth doped fiber amplifier to produce an amplified second beam. The first and second amplified beams are combined.
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First Claim
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International Classification(s)
Cited Art Landscape
| Patent Info | (Count) | # Cites | Year |
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| 4,831,616 Multiplexed fiber optics wideband data distribution system | 59 | 1987 | |
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| 5,778,014 Sagnac raman amplifiers and cascade lasers | 80 | 1996 | |
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| 6,414,786 Method and apparatus for reducing polarization dependent gain in Raman amplification | 32 | 2000 | |
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| 5,210,631 Transmission of AM-VSB video signals over an optical fiber | 50 | 1989 | |
| 5,153,762 Method and apparatus for recovering AM channell signals distributed on an optical fiber | 45 | 1990 | |
| 5,107,360 Optical transmission of RF subcarriers in adjacent signal bands | 42 | 1990 | |
| 5,134,620 Laser with longitudinal mode selection | 78 | 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 | 75 | 1991 | |
| 5,140,456 Low noise high power optical fiber amplifier | 105 | 1991 | |
| 5,159,601 Method for producing a tunable erbium fiber laser | 94 | 1991 | |
| 5,191,586 Narrow band incoherent optical carrier generator | 77 | 1991 | |
| 5,257,124 Low distortion laser system for AM fiber optic communication | 59 | 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 | 59 | 1992 | |
| 5,200,964 Broad linewidth lasers for optical fiber communication systems | 84 | 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 | 71 | 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 | 63 | 1992 | |
| 5,373,389 Method for linearizing an unbalanced Mach Zehnder optical frequency discriminator | 35 | 1992 | |
| 5,295,209 Spontaneous emission source having high spectral density at a desired wavelength | 67 | 1992 | |
| 5,416,629 Intensity modulated digital optical communications using a frequency modulated signal laser | 79 | 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 | |
| 6,356,383 Optical transmission systems including optical amplifiers apparatuses and methods | 67 | 2000 | |
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| 6,101,024 Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers | 60 | 1998 | |
| 6,374,006 Chirped period gratings for raman amplification in circulator loop cavities | 68 | 1999 | |
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| 4,740,974 Optical amplifiers | 35 | 1985 | |
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| 5,218,655 Article comprising an optical waveguide with in-line refractive index grating | 58 | 1992 | |
| 5,323,404 Optical fiber laser or amplifier including high reflectivity gratings | 161 | 1993 | |
| 5,530,710 High-power pumping of three-level optical fiber laser amplifier | 62 | 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 | 66 | 1997 | |
| * 5,905,838 Dual window WDM optical fiber communication | 100 | 1998 | |
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| 5,629,795 Optical amplifying-repeating transmission system | 30 | 1995 | |
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| 5,883,736 Er-doped optical fiber amplifier | 73 | 1997 | |
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| 6,081,366 Optical fiber communication system with a distributed Raman amplifier and a remotely pumped er-doped fiber amplifier | 88 | 1997 | |
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| 6,104,733 Multi-stage optical fiber amplifier having high conversion efficiency | 18 | 1998 | |
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| 6,359,725 Multi-stage optical amplifier and broadband communication system | 76 | 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 | 47 | 2000 | |
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| 5,497,386 Optical-fibre passively mode locked laser generator with non-linear polarization switching | 39 | 1994 | |
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| 6,320,884 Wide bandwidth Raman amplifier employing a pump unit generating a plurality of wavelengths | 59 | 1998 | |
| * 6,151,160 Broadband Raman pre-amplifier for wavelength division multiplexed optical communication systems | 95 | 1998 | |
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| 6,081,355 Multi-wavelength light source | 31 | 1997 | |
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| 4,881,790 Optical communications system comprising raman amplification means | 80 | 1988 | |
| 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 | |
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| 5,664,036 High resolution fiber optic probe for near field optical microscopy and method of making same | 81 | 1995 | |
| 5,796,909 All-fiber, high-sensitivity, near-field optical microscopy instrument employing guided wave light collector and specimen support | 43 | 1996 | |
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| 5,838,700 Raman fibre laser, bragg fibre-optical grating and method for changing the refraction index in germanium silicate glass | 44 | 1997 | |
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| 5,757,541 Method and apparatus for an optical fiber amplifier | 27 | 1997 | |
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| 5,861,981 Optical amplifier having dynamically shaped gain | 64 | 1997 | |
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| 6,191,854 Optical telecommunications system | 30 | 1998 | |
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| 5,485,536 Fiber optic probe for near field optical microscopy | 67 | 1994 | |
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| 5,559,920 Dispersion compensation in optical fiber communications | 68 | 1995 | |
| * 5,959,750 Method of upgrading transmission capacity by Raman amplification | 128 | 1996 | |
| 5,659,644 Fiber light source with multimode fiber coupler | 59 | 1996 | |
| 6,191,877 WDM optical fiber system using Raman amplification | 51 | 1996 | |
| 5,878,071 Fabry-perot pulsed laser having a circulator-based loop reflector | 22 | 1997 | |
| * 5,887,093 Optical fiber dispersion compensation | 99 | 1997 | |
| 5,847,862 Multi-channel optical fiber communication system | 47 | 1997 | |
| 6,147,794 Raman amplifier with pump source for improved performance | 66 | 1999 | |
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| 5,790,300 Multi-channel fiber amplification system and associated method | 24 | 1996 | |
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| 6,437,906 All-optical gain controlled L-band EDFA structure with reduced four-wave mixing cross-talk | 38 | 2000 | |
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| 5,798,853 Optical communication system compensating for chromatic dispersion and phase conjugate light generator for use therewith | 82 | 1996 | |
| 6,219,176 Method for gain equalization, and device and system for use in carrying out the method | 41 | 1998 | |
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| 4,685,107 Dispersion compensated fiber Raman oscillator | 49 | 1986 | |
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| * 6,310,716 Amplifier system with a discrete Raman fiber amplifier module | 61 | 2000 | |
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| 6,236,496 Optical fiber amplifier and optical amplification method | 27 | 1997 | |
| * 6,263,139 Optical transmission system with group velocity dispersion compensation | 47 | 1999 | |
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| 5,050,183 Figure eight shaped coherent optical pulse source | 74 | 1990 | |
| 5,359,612 High repetition rate, mode locked, figure eight laser with extracavity feedback | 52 | 1993 | |
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| 5,225,925 Sensitized erbium fiber optical amplifier and source | 58 | 1991 | |
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| 5,542,011 Optical amplifiers | 25 | 1994 | |
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| 5,117,196 Optical amplifier gain control | 67 | 1990 | |
| 5,191,628 Optical amplifiers | 61 | 1991 | |
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| * 6,417,959 Raman fiber amplifier | 48 | 2001 | |
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| 5,504,771 Fiber-optic ring laser | 37 | 1992 | |
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| 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 | 52 | 1996 | |
| 5,768,012 Apparatus and method for the high-power pumping of fiber optic amplifiers | 32 | 1997 | |
| 6,008,933 Multiple stage optical fiber amplifier | 24 | 1997 | |
| 5,920,423 Multiple pumped fiber amplifiers for WDM communication systems with adjustment for the amplifier signal gain bandwidth | 80 | 1997 | |
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| * 6,404,964 Dispersion managed optical waveguide and system with distributed amplification | 48 | 2000 | |
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| 5,513,194 Stretched-pulse fiber laser | 99 | 1995 | |
| 5,617,434 Stretched-pulse fiber laser | 75 | 1996 | |
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| 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 | |
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| 5,450,427 Technique for the generation of optical pulses in modelocked lasers by dispersive control of the oscillation pulse width | 110 | 1994 | |
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| 5,226,049 Optical fiber rare earth ion upconversion laser system | 41 | 1992 | |
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| 5,577,057 Modelocked lasers | 43 | 1993 | |
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| 5,734,665 Optical fiber laser | 25 | 1996 | |
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| 5,541,947 Selectively triggered, high contrast laser | 72 | 1995 | |
| 6,043,927 Modulation instability wavelength converter | 56 | 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 | 55 | 1999 | |
| 6,335,820 Multi-stage optical amplifier and broadband communication system | 51 | 1999 | |
| * 6,356,384 Broadband amplifier and communication system | 99 | 2000 | |
| 6,239,902 Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers | 50 | 2000 | |
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| * 5,978,130 Dual-band fiber optic amplification system using a single pump source | 38 | 1997 | |
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| 4,952,059 Reentrant fiber raman gyroscope | 22 | 1988 | |
| 5,673,281 Solid state system for frequency conversion using raman-active media and non-linear media | 47 | 1996 | |
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| 5,579,143 Optical system with tunable in-fiber gratings | 96 | 1993 | |
| 5,467,212 Addressable grating modulation system for optical cable TV system | 59 | 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 | 97 | 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 | 98 | 1996 | |
| 5,798,855 Optical monitoring channel for wavelength division multiplexed optical communication system | 36 | 1996 | |
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| 6,088,152 Optical amplifier arranged to offset Raman gain | 92 | 1999 | |
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| 5,479,291 Non-linear optical interferometer with saturated amplifier | 27 | 1994 | |
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| 5,477,555 Method and device for generating optical pulses | 28 | 1994 | |
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| 5,295,016 Polarization insensitive amplification device | 33 | 1992 | |
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| 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 | 46 | 1993 | |
| 5,521,738 Data encoded optical pulse generator | 34 | 1994 | |
| 5,473,622 Cladding-pumped MOPA structure | 63 | 1994 | |
| 5,880,866 Time division demultiplexing using selective Raman amplification | 41 | 1996 | |
* Cited By Examiner
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 17, 2014 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| 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 |