US Patent No: 6,731,423
Number of patents in Portfolio can not be more than 2000
Optical amplifier and method
Stats
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May 4, 2004
Issued date -
Aug 15, 2001
filing date -
09/930,336
serial no -
Expired
status
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Abstract
A broad bandwidth optical amplifier (50) includes an optical pump source (52). A Raman chamber (56) is coupled to an output (54) of the optical pump source (52). An optical fiber ring (62) having a first end (64) is coupled to a first end (66) of the Raman chamber (56). A second end (60) of the optical fiber is coupled to a second end (58) of the Raman chamber (56). A doped optical fiber is coupled to a second end of the optical fiber ring. The Raman chamber produces a number resonant Raman stokes lines.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,574,589 Self-amplified networks | 37 | 1995 | |
| 6,191,877 WDM optical fiber system using Raman amplification | 51 | 1996 | |
| 6,163,636 Optical communication system using multiple-order Raman amplifiers | 110 | 1999 | |
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| 4,523,315 Raman gain medium | 17 | 1982 | |
| 4,699,452 Optical communications system comprising Raman amplification means | 94 | 1985 | |
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| 5,513,194 Stretched-pulse fiber laser | 90 | 1995 | |
| 5,956,355 Method and apparatus for performing optical measurements using a rapidly frequency-tuned laser | 156 | 1997 | |
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| 6,122,298 Multi-wavelength optical pump | 33 | 1996 | |
| 6,052,219 Wide bandwidth Raman amplifier capable of employing pump energy spectrally overlapping the signal | 41 | 1999 | |
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| 4,633,103 Two cell stimulated Raman scattering frequency conversion laser | 18 | 1983 | |
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| 6,374,006 Chirped period gratings for raman amplification in circulator loop cavities | 63 | 1999 | |
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| 4,780,876 Method and apparatus for generating coherent radiation | 10 | 1987 | |
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| 5,521,703 Diode laser pumped Raman gas analysis system with reflective hollow tube gas cell | 16 | 1994 | |
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| 6,163,554 Optical fiber raman laser | 19 | 1998 | |
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| 4,389,617 Combination ring cavity and backward Raman waveguide amplifier | 23 | 1981 | |
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| 5,293,395 Stimulated raman laser of amplifier using axicon pumping | 1 | 1993 | |
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| 5,880,877 Apparatus and method for the generation of high-power femtosecond pulses from a fiber amplifier | 102 | 1997 | |
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| 6,200,309 Photodynamic therapy system and method using a phased array raman laser amplifier | 44 | 1998 | |
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| 6,151,337 Continuous-wave Raman laser having a high-finesse cavity | 15 | 1998 | |
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| 4,720,160 Optical resonant cavity filters | 56 | 1984 | |
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| 4,685,107 Dispersion compensated fiber Raman oscillator | 48 | 1986 | |
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| 6,052,393 Broadband Sagnac Raman amplifiers and cascade lasers | 77 | 1998 | |
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| 5,072,135 Power laser pulse generator | 10 | 1990 | |
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| 6,151,340 Method and apparatus for locking the wavelength of beacon beam in a free-space laser communications system | 21 | 1998 | |
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| 6,081,366 Optical fiber communication system with a distributed Raman amplifier and a remotely pumped er-doped fiber amplifier | 87 | 1997 | |
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| 4,833,681 Semiconductor laser wavelength stabilizer | 28 | 1986 | |
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 | Nov 4, 2015 |
| 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 |