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7345811 Multimode fiber optic amplifier and method of amplifying optical signals  
A multimode fiber receiver includes a multimode collimator, a multimode fiber optic amplifier and a detector. The collimator receives incoming signals and provides the signals to the amplifier. The...
7271949 Multi-wavelength light source and wavelength division multiplexing system using the same  
A multi-wavelength light source includes an amplifier for generating light over a wide wavelength range; and, an optical fiber grating including a plurality of gratings formed on an optical fiber...
7224516 Multimode fiber optic amplifier and method of amplifying optical signals  
A multimode fiber receiver includes a multimode collimator, a multimode fiber optic amplifier and a detector. The collimator receives incoming signals and provides the signals to the amplifier. The...
7215462 Filter for selectively processing optical and other signals  
A multi-section filter is provided for use in processing optical signals and other signals that can be readily projected from one filter section to another. Filters of the invention can be...
7209283 Compact optical amplifier with a flattened gain profile  
A flattened gain amplifier has a waveguide with a core doped with at least one species of rare earth ion. The rare earth ion has a gain profile with a first gain in a first wavelength band and a...
7139119 Fiber amplifier with suppression of amplified spontaneous emission  
A fiber amplifier module for amplifying a signal pulse includes an optically pumped double-pass fiber amplifier in which a fiber Bragg grating reflects an amplified pulse in between the first and...
7133194 Wavelength tunable light source integrated with optical amplifier, beam steering unit, and concave diffraction grating  
Provided is a wavelength tunable light source that can electrically tune wavelengths by monolithically integrating an optical amplifier, a beam steering unit, and a concave diffraction grating on a...
7106501 Fiber amplifier with suppression of amplified spontaneous emission  
A fiber amplifier module for amplifying a signal pulse includes an optically pumped double-pass fiber amplifier in which a fiber Bragg grating reflects an amplified pulse in between the first and...
7088497 Optical device with polarization diversity module  
In one embodiment, an optical device includes a polarization diversity module configured to receive an optical input signal and output a first optical output signal and a second optical output...
7068886 Millimeter wave oscillator using fiber Bragg grating  
Provided is a millimeter wave oscillator for generating a high frequency signal required in wireless communication. The millimeter wave oscillator uses an overwritten fiber Bragg grating and a...
7010183 Surface plasmon devices  
A device including an input port configured to receive an input signal is described. The device also includes an output port and a structure, which structure includes a tunneling junction connected...
6980355 Wavelength-tunable amplified optical splitter  
A signal may be split by a splitter into a plurality of output signals. Each of these output signals may then be amplified. Amplified spontaneous emission noise may be removed using a tunable...
6980345 High speed optical signal processor including saturable absorber and gain-clamped optical amplifier  
Disclosed is a high speed optical signal processor which includes a saturable absorber area including a substrate, an active layer, a clad layer and a first upper electrode which are sequentially...
6898002 Optical device, optical module, optical amplifier, and optical transmission system  
The present invention relates to an optical device and the like which can facilitate a fine adjustment for an optical waveguide type diffraction grating device. The optical device includes a...
6678087 Optical amplifier and optical fiber communication system using the amplifier  
An optical amplifier is implemented which can reduce its size and cost by using a smaller number of components. Signal light coupled by an optical combiner with pump light fed from a pumping light...
6650400 Optical fibre amplifiers  
An optical amplification system has an active fibre section having an optical fibre 10 and containment means 8, 12 containing light of a specific wavelength within the active fibre section. The...
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...
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...
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...
6539153 Light limiter  
The object of the present invention is to provide a light limiter which can control the generation of an optical surge, comprises few components, and has high reliability; in order to achieve the...
6496303 Ultra-broadband low-noise gain-flattened rare-earth-doped fibre amplifier  
An optical amplifier waveguide provides variable amplification gain to a broad wavelength input signal. The degree of amplification is proportional to the length of the transmission of the input...
6414787 Optical fiber amplifier having a gain flattening filter  
An optical fiber amplifier of the erbium type is intended to amplify light signals within a wavelength band, e.g. in the range of 1540-1555 mm. The active optical fiber receives light signals to be...
6408117 Mechanically induced long period optical fiber gratings  
By urging an ordinary single-mode (usually dispersion-shifted) fiber into an external, long period mechanical grating, a highly wavelength-selective coupling between the fiber's guiding mode and a...
6392789 Erbium-doped optical fiber having gratings formed therein and fabrication method thereof  
An erbium-doped optical fiber (EDF) and a fabricating method thereof The erbium-doped optical fiber has a core formed by substantially doping silica with erbium and having gratings formed therein...
6377392 Optical amplifier  
A WDM ring transmission system is provided whereby each optical signal is first dropped from the ring, supplied to an amplifier, and then input to an optical receiver. Typically, a filtering...
6347007 Semiconductor laser high power amplifier system  
A high power laser optical amplifier system for material processing comprises multiple stage fiber amplifiers with rejection of propagating ASE buildup in and between the amplifier stages as well...
6252701 Optical fiber amplifier  
An optical fiber amplifier includes a signal light source integral with an exciting light source. The optical fiber amplifier has a Fabry-Perot semiconductor laser element having a light emitting...
6240224 Coated optical fiber  
A coated optical fiber comprises a coating, an optical fiber, at least one waveguiding region and an index grating. The waveguiding region contains at least one photosensitive region, the index...
6233090 Optical amplifier  
An optical amplifier with improved output power and reduced noise is disclosed. A first optical fiber amplifier is pumped by a first pumping light and a second optical fiber amplifier is pumped by...
6198568 Use of Chirped Quasi-phase-matched materials in chirped pulse amplification systems  
The limitations on maximum pulse energies from a fiber-grating pulse compressor are circumvented by placing a chirped-period quasi-phase-matched (QPM) crystal after the fiber-grating pulse...
6195200 High power multiwavelength light source  
In accordance with the invention, a multiwavelength light source comprises a length of optical waveguide amplifier, a multiwavelength reflector for reflecting a plurality of different spectrally...
6160658 Optical amplifier for wavelength multiplexing optical transmission  
An optical amplifier for wavelength multiplexing optical transmission has an optical amplifier for amplifying wavelength-multiplexed signal light in which signal lights having wavelengths different...
6154590 Wavelength-tunable devices and systems comprising flexed optical gratings  
In accordance with the invention, a tunable optical grating device comprises a grating, which is fixed at both ends to a support frame and is flexed so that a tensile strain induced in the grating...
6148128 Passively temperature-compensated wavelength-tunable device comprising flexed optical gratings and communication systems using such devices  
In accordance with the invention, a passively temperature-compensated tunable optical grating device comprises a grating, which is fixed at both ends to a support frame, and is mechanically or...
6144788 High stability fiber light source  
A fiber light source having, for instance, a 980 nm pump laser for pumping an erbium-doped optical fiber via a 980/1550 nm WDM coupler. The pumped fiber emits 1550 nm light. A portion of the 1550...
6141142 Article comprising an L-Band optical fiber amplifier  
L-band EDFA (Er-doped fiber amplifier) characteristics are improved by provision of filter means in the C-band, the filter means having a figure of merit greater than 400dBnm. The filter means...
6134046 Optical amplifying fiber and forming method for fiber grating  
An optical amplifying fiber including a core doped with a rare earth element and having a first refractive index, a cladding surrounding the core and having a second refractive index smaller than...
6122096 Expandable wavelength-selective and loss-less optical add/drop system  
An expandable optical add/drop system according to the present invention includes an optical add/drop multiplexer with an integrated amplification and wavelength-selective fiber path and passive...
6061172 Active optical fiber and optical fiber amplifier  
The present invention aims at providing an active optical fiber and an optical fiber amplifier, in which a conversion efficiency of pumping light to be input into the active optical fiber is...
6058128 Apparatus for providing a stabilized laser source  
Apparatus is provided for an improved stabilized laser source comprising a laser source having a light beam output and an electrical input. An optical waveguide, such as an optical fiber, having an...
6055348 Tunable grating device and optical communication devices and systems comprising same  
A tunable optical grating device that can be digitally and latchably tuned comprises a length of waveguide including a grating region, and a movable body and fixed substrate attached to the...
5999309 Optical pulse amplifier  
An optical pulse amplifier includes: a first optical coupler, having first, second, third and fourth ports, for outputting an optical pulse incident onto the first port to the second and third...
5978131 In-fiber two-stage amplifier providing WDM signal conditioning  
The amplifier is a two-stage amplifier in which dispersion compensation and WDM channel equalization are carried out using a plurality of in-waveguide Bragg gratings placed between the two stages....
5966481 Optically pumped optical waveguide amplifier  
An optically amplifying waveguide guides both the LP 01 and the LP 02 mode. Its erbium distribution profile is preferentially matched with the modal field distribution of the LP 02 mode. The...
5920424 Article comprising a broadband optical fiber amplifier  
We have found that it is possible to make a multistage optical fiber amplifier having a substantially flat gain band of spectral width of 40 nm or more, excellent noise figure (e.g.,<4 dB) and...
5892781 High output fiber amplifier/lasers for fiberoptic networks  
Arrangements for high output power laser sources and optical fiber amplifiers are disclosed. In one arrangement, an optical fiber section which is doped with erbium, is coupled with one or two...
5847862 Multi-channel optical fiber communication system  
A significant part of signal-to-noise degradation in WDM optical fiber communications, due to Raman crosstalk, is found to be deterministic in nature. Shaping of amplifier output to offset...
5838700 Raman fibre laser, bragg fibre-optical grating and method for changing the refraction index in germanium silicate glass  
The inventions relate to the sphere of the laser technology, the fibre and integrated optics, and are industrially applicable in elements of the fibre and waveguide optics made of germanium...
5757540 Long-period fiber grating devices packaged for temperature stability  
The present applicants have discovered that one can fabricate a long-period grating wherein the grating peak wavelength λ p will be shifted in different directions when the grating is subject to...
5712715 Optical transmission system with spatially-varying Bragg reflector  
An optical transmission system having a transmission waveguide, an optical amplifier, a pump radiation source for supplying pump radiation to the optical amplifier, and a Bragg grating for...
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