|
Match
|
Document |
Document Title |
|
|
6633430 |
Booster amplifier with spectral control for optical communications systems
An optical amplifier for fiber-optic communications systems is provided. The optical amplifier may have variable optical attenuators for adjusting the power on each of multiple input channels. A...
|
|
|
6633429 |
Optical amplification method and device usable with bands other than the C-band
An optical amplifier includes an optical amplification medium, an excitation source to stimulate the amplification medium to output at least one wavelength gain peak, and a gain equalizer to...
|
|
|
6631028 |
Broadband amplifier and communication system
An in-line broadband amplifier includes at least one input fiber and a WDM splitter coupled to the input fiber. The splitter splits an optical signal into at least a first wavelength and a second...
|
|
|
6631026 |
Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method
In an optical amplifier for use in, for example, a wavelength multiplexing optical communication system, in order to allow an excitation light source to be enlargeable or removable in accordance...
|
|
|
6624925 |
Optical amplifier employing an active doped unitary amplifier
An active optical amplifier in which a unitary optical amplifier constructed from a unitary optically transparent chip that has been doped so as to be optically active, amplifies incoming signal...
|
|
|
6621626 |
Modular optical amplifier structure for highly dense interleaved WDM systems
An advantageous amplification architecture for DWDM systems including systems with very high capacity is provided. A modular interleaved structure for amplification is provided. Advantages include...
|
|
|
6621624 |
Optical gain fibers
Disclosed are optical gain fibers which include an erbium-containing core and a cladding surrounding the core and which have ripple of less than about 25% over about a 40 nm wide window or ripple...
|
|
|
6621622 |
Optical amplifier and optical amplifier arrangement with reduced cross phase modulation
An optical amplifier and optical amplifier arrangement with reduced cross phase modulation wherein in an active fiber of the optical amplifier, the fiber being doped with ions of elements from the...
|
|
|
6621621 |
Line amplification system for wavelength switched optical networks
A line amplification system connected on the fiber between two flexibility sites of a wavelength switched network is built with a number of modules that can be arranged in a line amplifier,...
|
|
|
6621619 |
Hybrid brillouin/erbium doped fiber amplifier apparatus and method
A method and apparatus to enable the use of low cost high RIN optical sources for microwave photonic links by combining the wide-gain bandwidth and low cost of an EDFA, with the narrow gain...
|
|
|
6618193 |
Optical amplification systems and methods
Optical amplification systems and methods are disclosed. A first optical amplification system includes an optical interface filter configured to separate a desired communications band from at least...
|
|
|
6614589 |
Method and system for controlling amplifier power in an optical communications network
The invention includes a method for controlling amplifier output power in an optical communications network. A first transmission parameter is determined at a first amplifier. In an exemplary...
|
|
|
6614587 |
Control methods for a metro optical amplifier
A reliable and inexpensive method for deploying, operating and maintaining optical amplifiers in a variety of optical networks under a wide range of conditions using channel number reference...
|
|
|
6614572 |
Apparatus and method for controlling optical gain profiles in a temperature independent manner
An apparatus for processing an optical beam has at least one variable optical element to dynamically alter the polarization state of a polarized optical beam to form a polarization-altered optical...
|
|
|
6611641 |
Method and apparatus for a highly efficient, high performance optical amplifier
A high efficiency, high performance optical amplifier includes an amplification stage comprised of two Erbium doped fiber (EDF) gain sections separated by a variable optical attenuator (VOA). A...
|
|
|
6611640 |
Optical dispersion compensator
An optical dispersion compensator includes a saturable absorber. Coupled to the saturable absorber is a pre-amplifier and a post-amplifier. The saturable absorber compresses optical pulse signals...
|
|
|
6611374 |
Optical amplifier controller having adjustable slew-rate limiter
A method and apparatus is provided for controlling the optical output power from an optical amplifier arrangement. The arrangement includes a rare-earth doped fiber for imparting gain to an optical...
|
|
|
6611371 |
Single parameter gain slope adjuster for an optical system
An optical device including an optical amplifier to amplify optical signals received through an optical input, and to supply the amplified optical signals from an optical output, and an optical...
|
|
|
6611370 |
Raman amplifier system, apparatus and method for identifying, obtaining and maintaining an arbitrary Raman amplification performance
A Raman amplifier, system and method using a plurality of pumps configured to pump light into an optical fiber so as to Raman-amplify an optical signal propagating through the optical fiber. The...
|
|
|
6606190 |
Inhomogeneity tunable erbium-doped fiber amplifier with long wavelength gain band and method of blocking propagation of backward amplified spontaneous light emission in the same
Disclosed herein is an inhomogeneity tunable erbium-doped optical fiber amplifier with a long wavelength band and method of blocking a backward amplified spontaneous light emission in the same. The...
|
|
|
6606189 |
Light amplifier and light amplifying method
In a light amplifier and a light amplifying method, a dummy light (saturated light) source 40 emits dummy light, a directional coupler 11 composes the dummy light with a light signal, and the...
|
|
|
6603896 |
Power fiber amplifier with flat gain
The gain of a fiber amplifier is typically not uniform across the bandwidth used for amplifying optical communications signals. In a power fiber amplifier unit, having a fiber pre-amplifier and a...
|
|
|
6603596 |
Gain and signal level adjustments of cascaded optical amplifiers
An optical amplification device which includes first and second optical amplifiers, and a controller. The first optical amplifier receives a light and amplifies the received light. The second...
|
|
|
6603595 |
Raman-based utility optical amplifier
An optical amplifier with a flattened wideband response is obtained by coupling counter-propagating pumping energy into an optical waveguide to cause Raman amplification in the optical waveguide,...
|
|
|
6602002 |
High capacity optical transmission arrangement
A high-capacity optical transmission arrangement utilizing a plurality of laser sources and a plurality of wide-band optical amplifiers permit the reliable transmission of 1 Tb/sec rates over...
|
|
|
6600596 |
Method and system for controlling amplifier power in an optical communications network having add/drop capability
The invention includes a method for controlling amplifier output power in an optical communications network having channel add/drop capability. A first transmission parameter and a second...
|
|
|
6600595 |
Multi-stage optical amplifier apparatus having fiber grating with a cutoff wavelength less than the pump light wavelength
An optical amplifier apparatus according to the invention is provided with a pumping light source that outputs pumping light for pumping first and second optical amplifying media. Therefore an...
|
|
|
6600594 |
Intelligent variable optical attenuator with controller and attenuation calibration
A variable optical attenuation system has at least one variable optical attenuation device that receives a light signal, attenuates the light signal, and transmits an attenuated light signal. The...
|
|
|
6600593 |
Method and an apparatus for amplitude equalization of a plurality of optical signals
In a method of amplitude equalization of a plurality of optical signals having mutually different wavelengths, the optical signals are launched into a first end of an optical fiber ( 5 ). The...
|
|
|
6597494 |
Polarization maintaining optical fiber amplifier and optical amplifier
An optical fiber amplifier having improved gain and reduced noise, and an optical amplifier which restrains an unnecessary polarization component in the signal output light, maintains polarization...
|
|
|
6594046 |
Level-flattening circuit for WDM optical signals
It is an object of the invention to provide a level-flattening circuit for WDM optical signals which can be used in an optical signal repeating station. A level flattening circuit for WDM optical...
|
|
|
6590700 |
Adaptive optical amplifier control
In method of controlling an optical amplifier dynamically adapts to both configuration and performance changes of a communications system. An error vector is calculated to indicate a difference...
|
|
|
6587606 |
Waveguide fiber dispersion compensating regenerator
Disclosed is a dispersion compensating optical regenerator that provides for enhanced performance of telecommunication systems employing varying-soliton signal propagation and dispersion...
|
|
|
6587266 |
Bi-directional isolator
Bi-directional wavelength interleaving optical isolators provide the ability to pass a first set of optical signals (e.g., ITU even channels) from a first port to a second port, while preventing a...
|
|
|
6587261 |
Optical transmission systems including optical amplifiers and methods of use therein
Optical transmission systems of the present invention include at least one optical amplifier configured to provide optical amplification of one or more information carrying optical signal...
|
|
|
6583926 |
Optical amplifiers with age-based pump current limiters
Optical amplifiers and other optical network equipment for handling optical data signals in fiber-optic communications links are provided. Optical fiber that is pumped by laser diode pumps is used...
|
|
|
6583924 |
Optical amplifier
In the optical amplifier an optical divider based on long wavelength (or short wavelength) transmission type dielectric multi-layer filter divides input signal light according to wavelengths, and...
|
|
|
6583923 |
Optical fiber amplifier
The invention is directed to an optical fiber amplifier having a switchable or interchangeable fiber module for varying the effective length of an amplification fiber. An optical fiber amplifier...
|
|
|
6583922 |
Optical amplifier site with reduced noise and transmission system utilizing such
An optical amplifier site comprising: (i) a distributed Raman amplifier providing a first signal gain level; (ii) an optical amplifier located downstream from the distributed Raman amplifier, the...
|
|
|
6583909 |
Optical communication system and optical signal control method therefor
An optical communication system according to the present invention includes an optical transmission device and a repeater. The repeater has an automatic level controller for performing average...
|
|
|
6580551 |
Method for gain equalization, and device and system for use in carrying out the method
The present invention relates to a method for gain equalization, for example. First, an optical transmission line including an optical amplifier having a gain changing nonlinearly with wavelength...
|
|
|
6580550 |
Filter with variable transmission character, optical transmission equipment and method of optical transmission
In order to obtain optical transmission equipment for wavelength division multiplexing for providing a small inter-wavelength deviation regardless of a change in an input level, an amplification...
|
|
|
6580549 |
Wavelength-multiplexed light amplifying apparatus, optical amplifier and optical add-and-drop apparatus using wavelength-multiplexed light amplifying basic unit
The present invention relates to a wavelength-multiplexed light amplifying apparatus to be used in a state of being connected to a branching portion of a multiplexing/branching unit or to be used...
|
|
|
6580544 |
Method and apparatus for automatically correcting a bias voltage on an optical modulator of external-modulation optical emitter
A control method and apparatus used for a bias controller of automatic bias correction on an optical modulator of optical emitter of external modulation type is a close-loop control system,...
|
|
|
6577438 |
Method and apparatus for monitoring and controlling gain tilt in an optical amplifier
An optical amplifier includes an optical amplification medium which has simultaneous inputs of a WDM signal light and a pumping light and amplifies the WDM signal light, a pumping light source, and...
|
|
|
6574038 |
Optical transmission path having sections which overcompensate for dispersion occurring in the sections
An optical communication system which includes a transmission path through which a light is transmitted to a specific point, such as to a receiver. The transmission path includes a plurality of...
|
|
|
6567438 |
Active and low-power laser stabilization
Designs and techniques for actively stabilizing optical cavities in devices such as fiber lasers with reduced power consumption in the active control.
|
|
|
6563630 |
Optical amplifier apparatus
There is proposed an optical amplifier apparatus particularly for use in networks distributing signals by optical fibers, comprising first and second parallel optical branches ( 1, 2 ), the first...
|
|
|
6563629 |
Method and apparatus for full C-band amplifier with high dynamic gain range
A method and apparatus for optical amplification with a large dynamic gain range in both the non-linear (1530-1540 nm) and linear (1540-1565 nm) regimes of the C-Band. The large dynamic gain range...
|
|
|
6563628 |
Gain tilt free optical fiber amplifier in a wide dynamic gain range
An optical fiber amplifier comprises an optical fiber for light loss which is provided in a later stage than an optical fiber amplification section or midway therein, the amount of light absorption...
|