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8064130 |
Optical amplifier
It is an object of the present invention to provide an optical amplifier using optical amplification mediums each doped with a rare earth element for increasing amplification efficiency of signal...
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7872794 |
High-energy eye-safe pulsed fiber amplifiers and sources operating in erbium's L-band
An apparatus and that provide an optical-fiber amplifier having at least one erbium-doped fiber section and an optical pump coupled to the erbium-doped fiber section, wherein the apparatus is...
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7848014 |
Erbium and Erbium/Ytterbium cladding pumped hybrid optical amplifier
An optical fiber amplifier apparatus and optical signal amplification method are provided. In one example, the amplifier apparatus comprises an optical combiner that is configured to receive an...
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7440171 |
Staged amplifier for lower noise figure and higher saturation power
An optical amplifier utilizes two or more doped fiber segments or portions to achieve a lower noise figure and a higher saturation power than would be possible using any one of the doped fiber...
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7440172 |
Optical amplifier
An doped fiber optical amplifier featuring an optical component having first wavelength division multiplexer, an isolator and a second wavelength division multiplexer is described. The isolator...
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6954305 |
Optical amplifier and optical transmission system using it
An optical amplifier 1 is constructed using an amplification optical waveguide in which a first amplification optical fiber 10 and a second amplification optical fiber 20 are connected in series. A...
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6894828 |
Power scalable waveguide amplifier and laser devices
The present invention is directed to guided wave systems, beam transport and waveguide techniques. The invention may comprise passive or active, hollow and dielectric core self-imaging mode wave...
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6717721 |
Large effective area erbium doped fiber optical amplifier
An optical waveguide amplifier fiber comprises a core region at least in part comprises Er2O3, Al2O3, GeO2 and Ga2O3. The amplifier fiber also comprises an inner clad surrounding the core region,...
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6519080 |
Optical amplifier and optical transmission system
An optical transmission system includes an optical transmitting unit (10) to transmit optical signals in a transmission wavelength band above 1570 nm; an optical receiving unit to receive the...
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6429964 |
High power, multiple-tap co-doped optical amplifier
A high power optical amplifier with a multiple-tap output includes a preamplifier stage (such as an EDFA), followed by a power amplifier comprises a concatenated set of co-doped optical amplifier...
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6077799 |
SPCVD silicate glasses
These glasses incorporate a combination of F and Al2 O3 to achieve even wider fluorescence and improved gain flatness. In addition, SPCVD incorporates large amounts of N into low-loss fiber whose...
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5936762 |
Doped optical waveguide amplifier
The core of a low phonon energy glass optical fibre is doped with trivalent Dysprosium ions for application as an efficient optical fibre amplifier operating around 1.3 μm. The device utilises the ...
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5731892 |
Article comprising hybrid optical fiber amplifier
Multistage Er-doped fiber amplifiers (EDFAs) are disclosed. They comprise a first stage that comprises Er and Al, and further comprise a second stage that comprises Er and a further rare earth...
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5721635 |
Optical fiber amplifier and optical amplifier repeater
This method comprises the steps of: introducing light signals having different wavelengths into an optical amplifier, wherein the optical amplifier has a plurality of fibers with rare earth element...
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5546213 |
Optical amplifier and optical communication system provided with the optical amplifier
An optical communication system transmits information with a pumping light beam acting as the carrier, and with a signal light beam. This optical communication system includes an optical fiber...
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5502591 |
Optical amplifier with a doped fluoride glass of optical fibre and process for producing said amplifier
Optical amplifier with a doped fluoride glass optical fibre and process for the production of said amplifier.In said amplifier, two monomode silica fibres (4a, 6a), whereof at least one is doped...
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5491581 |
Rare earth doped optical fibre amplifiers
An optical amplifier which includes an optical fiber having an erbium doped core surrounded by cladding, a pump for pumping the fiber with pump light at a pump wavelength coupled to the fiber,...
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5274734 |
Article comprising a rare earth or transition metal doped optical fiber
We have discovered that silica-based optical fibers that are doped with Ge, Al and a rare earth (e.g., Er) can be very susceptible to hydrogen-induced attenuation change. For instance, such fiber...
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5111334 |
Multi-stage fiber-optic amplifier
A fiber-optic amplifier, whose light signal input and light signal output may be connected with a monomode fiber for 1536 nm light signals, is composed of two or more cascade connected amplifier...
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5050949 |
Multi-stage optical fiber amplifier
In this invention there is disclosed a multi-stage optical fiber amplifier for providing a new functon, that of gain equalization. The disclosed multi-stage optical fiber amplifier comprises at...
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