| Patent Number |
Title Of Patent |
Date Issued |
| 7129510 |
Optical sensors |
October 31, 2006 |
| An optical sensor comprises at least one bundle comprising a plurality of optical fibers and a plurality of separate fluid-tight longitudinally extending ducts; and fluid connectors for introducing fluids selectively into at least some of said ducts. Test cells are formed (a) by array |
| 6862135 |
Raman amplifiers with improved signal power management |
March 1, 2005 |
| An optical link comprises a first optical amplifier having a first gain spectrum with a first gain ripple and a second optical amplifier having a second gain spectrum with a second gain ripple. A combined gain spectrum of the first and second gain spectra is substantially flat and has a |
| 6810173 |
Pump power monitor system and method for gain control of optical amplifier |
October 26, 2004 |
| An optical fiber amplifier system includes an optical fiber adapted for use as an optical wave guide amplifier, and at least one optical pump optically coupled into the optical amplifier, wherein the pump receives both a DC electrical input and an AC electrical input, and wherein the |
| 6724524 |
Gain control in Raman amplifiers |
April 20, 2004 |
| A Raman fiber amplifier includes: a transmission fiber; at least one optical pump providing optical pump power to the transmission fiber; and at least one pump power detector; at least one signal detector detecting signal power propagating through the transmission fiber. The Raman fiber |
| 6665114 |
Hybrid Raman-erbium optical amplifier |
December 16, 2003 |
| A hybrid optical signal amplifier is provided which includes the combination of a Raman amplifier and an EDFA assembly. The Raman amplifier has an output defined by regions of higher and lower gain levels, and the EDFA assembly has an output having a region, near the longer wavelengths |
| 6657774 |
Amplifier system with distributed and discrete Raman fiber amplifiers |
December 2, 2003 |
| An amplifier system includes: (i) a distributed Raman fiber amplifier and; (ii) a discrete Raman fiber amplifier that includes dispersion compensated fiber. The discrete Raman fiber amplifier is operatively connected to the distributed Raman fiber amplifier and amplifies signals received |
| 6587606 |
Waveguide fiber dispersion compensating regenerator |
July 1, 2003 |
| Disclosed is a dispersion compensating optical regenerator that provides for enhanced performance of telecommunication systems employing varying-soliton signal propagation and dispersion compensation. Allowing the solitons to change in amplitude, width and shape while traversing the |
| 6542661 |
Method for upgrading bandwidth in an optical system utilizing Raman amplification |
April 1, 2003 |
| A method for upgrading bandwidth in a fiber optic system utilizing Raman amplification and having an initial band capacity provided by a plurality of pumps including the steps of identifying a fiber optic system to be upgraded, activating at least one new pump in the fiber optic system |
| 6539154 |
Non-constant dispersion managed fiber |
March 25, 2003 |
| An improved telecommunications link is provided which includes a dispersion managed fiber with smoothly varying dispersion. The dispersion map may vary sinusoidally or as a sawtooth, for example. The smoothly varying dispersion works well for high data rate transmissions in a return to z |
| 6449408 |
Soliton pulse generator |
September 10, 2002 |
| A soliton pulse generator is formed by providing an input continuous wave, stimulating Brillouin scattering of an input wave having a frequency determined by the frequency of the input continuous wave to generate a backscattered wave, coupling a continuous wave having a frequency det |
| 6404964 |
Dispersion managed optical waveguide and system with distributed amplification |
June 11, 2002 |
| A unitary dispersion managed waveguide fiber with distributed amplification and a system incorporating the waveguide fiber are disclosed. Total dispersion along the waveguide fiber changes from positive to negative along the length of the waveguide over a transmission wavelength range. |
| 6342945 |
System and method for measuring polarization mode dispersion suitable for a production environme |
January 29, 2002 |
| A system for measuring polarization mode dispersion (PMD) in a fiber using a polarizer controlling the polarization state of light input to the fiber and a polarization analyzer measuring the polarization state of light output from the fiber. Jones matrix analysis is applied to data deri |
| 6310716 |
Amplifier system with a discrete Raman fiber amplifier module |
October 30, 2001 |
| An amplifier system includes:(i) a distributed Raman fiber amplifier adapted to amplify C and L-band signals and;(ii) a discrete Raman fiber amplifier module that includes a C-band amplification stage and an L-band amplification stage. The discrete Raman fiber amplifier module is operati |
| 6233387 |
Broadband pulse-reshaping optical fiber |
May 15, 2001 |
| A pulse-reshaping optical fiber having a core with refractive index n.sub.c surrounded by a cladding layer, the diameter of the core changing monotonically along the length of the fiber. The core includes a central region having a maximum refractive index n.sub.1 and a moat region di |
| 6222959 |
Nonlinear optical loop mirror with adiabatic pulse compression |
April 24, 2001 |
| A nonlinear optical loop mirror is combined with a pulse compressor. The nonlinear loop mirror receives both control pulses and data pulses and further transmits selected data pulses in accordance with relative amounts of overlap between individual control and data pulses. The pulse |
| 6163630 |
Method and apparatus for producing twisted solitons |
December 19, 2000 |
| An optical fiber path in a light amplifying apparatus such as a ring laser, figure eight laser, or nonlinear optical loop mirror, comprises circularly birefringent fiber in order to generate twisted solitons. The light being amplified will follow the pitch of a principle axis of the circ |
| 5925163 |
Method of making an optical fiber with an axially decreasing group velocity dispersion |
July 20, 1999 |
| An optical fiber preform is made by supplying the base glass reactant and the dopant glass reactant to a burner that generates a flame in which a stream of glass particles is produced. The burner moves with respect to a rotating mandrel to deposit layers of glass particles on the mandrel |
| 5822487 |
Fiber for reduced polarization effects in amplifiers |
October 13, 1998 |
| A single mode optical fiber suitable for use in an amplified fiber optic system which includes an inner glass core doped with a rare earth element and an outer transparent glass cladding. The fiber exhibits a plurality of mode coupling sites formed at regular intervals along the length o |
| 5717797 |
Non-linear optical loop mirror device providing pulse amplitude switching |
February 10, 1998 |
| A nonlinear optical loop mirror device having a distributed directional asymmetry. A dispersion decreasing optical fiber is formed into a loop by an optical coupler which divides input pulses into two component pulses that propagate around the loop in opposite directions, and which trans |
| 5704960 |
Method of forming an optical fiber for reduced polarization effects in amplifiers |
January 6, 1998 |
| A single mode optical fiber suitable for use in an amplified fiber optic system which includes an inner glass core doped with a rare earth element and an outer transparent glass cladding. The fiber exhibits a plurality of mode coupling sites formed at regular intervals along the length o |
| 5689596 |
Nonlinear optical loop mirror device providing pulse width switching |
November 18, 1997 |
| A nonlinear optical loop mirror device having a distributed directional asymmetry. A dispersion decreasing optical fiber is formed into a loop by an optical coupler which divides input pulses into two component pulses that propagate around the loop in opposite directions, and which trans |
| 5655039 |
Nonlinear optical loop mirror device including dispersion decreasing fiber |
August 5, 1997 |
| A nonlinear optical loop mirror device having a distributed directional asymmetry. A dispersion decreasing optical fiber is formed into a loop by an optical coupler which divides input pulses into two component pulses that propagate around the loop in opposite directions, and which trans |
| 5600479 |
Method and apparatus for optical logic and switching functions |
February 4, 1997 |
| Intrapulse Raman scattering is utilized in providing optical devices that can be adapted to perform various logic and switching functions. In a logic gate embodiment of the present invention, a plurality of pulses of the same central wavelength are coupled to produce an output pulse havi |
| 5579428 |
Solitons in dispersion flattened waveguide |
November 26, 1996 |
| A combination of dispersion flattened single mode optical waveguide fiber and soliton signal pulses yields an optimum telecommunication system capacity. The dispersion flattened fiber serves to relax tolerances on soliton center wavelength and intensity. In addition, the inventive co |
| 5504829 |
Optical fiber for soliton transmission and method of making |
April 2, 1996 |
| A single-mode optical fiber suitable for the transmission of solitons has a refractive index profile that changes along the length of the fiber to provide a fiber dispersion that monotonically decreases along the fiber from one end thereof to the other. The fiber includes a core of maxim |
