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7027698 |
Optical fiber for WDM transmission
A half-dispersion-shifted single mode optical transmission fiber (HDSF) having a core and a cladding. The core has an inner core with a first refractive-index difference and a first glass layer...
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7024083 |
Non-zero dispersion shifted optical fiber
An optical waveguide fiber including a central core region extending radially outward from the centerline and having a non-negative relative refractive index percent profile. The optical fiber...
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RE39028 |
High performance single mode waveguide
Disclosed is a single made optical waveguide fiber having a segmented core design. In particular, the core comprises three segments, each having characteristic dimensions and refractive index...
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7016581 |
Dispersion compensation unit and optical communication system
The present invention relates to a dispersion compensation unit capable of compensating for both the chromatic dispersion and dispersion slope of a non-zero dispersion-shifted optical fiber. The...
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7010203 |
Optical fiber manufacturing method and optical fiber
An object of the present invention is to provide an optical fiber manufacturing method and an optical fiber in which an increase in the transmission loss is suppressed by preventing hydroxyl group...
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7006751 |
Optical fiber for amplification or for laser emission
The invention relates to the field of amplifying or emitting optical fibers. It comprises an amplifying optical fiber doped with a rare earth comprising a plurality of successive segments ( 1, 2,...
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7006742 |
Highly nonlinear optical fiber and highly nonlinear optical fiber module
A highly nonlinear optical fiber includes a core, a cladding surrounding the core, and a coating covering the cladding. A bending loss at a wavelength of 1550 nanometers with a bending diameter of...
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7006743 |
Chromatic dispersion compensation optical fiber
The invention relates to a multiband chromatic dispersion compensation optical fiber comprising successively, from the center toward the periphery, a central slice whose maximum index is higher...
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7003203 |
Large effective area, low kappa, dispersion compensating optical fiber and telecommunication span including same
A dispersion compensating optical fiber for use in a high data rate telecommunications span or link. The dispersion compensating optical fiber in accordance with the invention provides excellent...
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7003205 |
Wide-band dispersion controlled optical fiber
Disclosed is a wide-band dispersion controlled optical fiber. The optical fiber enables the use of optical signals in various wavelength regions in a wavelength division multiplexing mode...
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6999667 |
Dispersion-controlled optical fiber
Disclosed is an optical fiber comprising a center core which forms a passageway for transmitting optical signals and has a refractive index N 1 , and a cladding which encloses the center core and...
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6990282 |
Photonic crystal fibers
A photonic crystal fiber comprising a bulk material having an arrangement of longitudinal holes, the fiber including a cladding region and a guiding core ( 280 ), the cladding region having an...
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6985660 |
Multiple cladding optical fiber
An optical fiber comprises a core region extending along a predetermined axis X, and a cladding region surrounding the core region. The cladding region 14 comprises first to (N+1)-th regions such...
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6975801 |
Dispersion compensating fiber for low slope transmission fiber and optical transmission line utilizing same
A Dispersion Compensation (DC) fiber for low slope transmission fiber (such as a NZDSF) and transmission line including same. The DC fiber has a refractive index profile having a central core with...
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6963682 |
Beam altering fiber lens device and method of manufacture
A multi-lens apparatus for altering the mode field of an optical signal is disclosed. The apparatus includes an optical fiber having a core region defining an optical axis and a GRIN-fiber lens...
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6959136 |
Optical fiber and optical transmission line
The optical fiber has a dispersion value at a 1.55 μm-wavelength band, of 6 to 24 ps/nm/km, and satisfies A>3×D+40, where D represents a dispersion value (ps/nm/km) at a central wavelength of...
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6954573 |
Wide band dispersion-controlled fiber
A wide band dispersion-controlled fiber which comprises a core forming an optical signal transmission path and having a peak refractive index, and a cladding surrounding the core and having a peak...
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6952516 |
Low attenuation optical fiber
A low attenuation optical fiber which falls within 2-14 ps/nm/km in absolute value of dispersion over the full wavelength range of 1530-1565 nm and no more than 0.25 dB/km of transmission loss at...
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6952517 |
Method for the manufacture of optical fibers, improved optical fibers, and improved raman fiber amplifier communication systems
The specification describes an improved optical fiber design in which the criteria for high performance in a Raman amplified optical system, such as moderate effective area, moderate dispersion,...
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6952518 |
Dispersion-shifted single-mode fiber having low dispersion slope for large capacity transmission
The invention relates to a low dispersion slope dispersion-shifted single-mode fiber for large capacity transmission comprising a core and a cladding. Said fiber is characterized in that said core...
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6950585 |
Hollow core photonic bandgap optical fiber
A photonic crystal optical fiber made up of an array of conventional hollow core optical fibers is disclosed. The array of optical fibers omits at least one fiber to form a central hollow core. The...
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6947652 |
Dual-band bend tolerant optical waveguide
An optical waveguide, such as an optical fiber, including a core having a refractive index n co and a radius r co ; an inner cladding laterally surrounding the core, the inner cladding having a...
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6937805 |
Dispersion compensating fiber and dispersion compensating fiber module
A dispersion compensating fiber, which has a negative dispersion slope with a large absolute value while maintaining the absolute value of the chromatic dispersion, and which has sufficient...
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6934454 |
Distributed optical amplifying apparatus, optical communication station, optical communication system, and optical fiber cable
An optical fiber transmission line including first, second and third optical fibers connected together so that light travels through the transmission line from the first optical fiber, then through...
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6931186 |
Chromatic dispersion compensation module
The field of the invention is that of chromatic dispersion compensation modules and of methods of designing chromatic dispersion compensation modules. The design method includes an optimization...
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6931187 |
Mode-filtering and mode-selecting method in multi-mode waveguide, and waveguide amplifier, semiconductor laser, and VCSEL using the method
Disclosed is a mode-filtering and mode-selecting method in a multi-mode waveguide, and a waveguide amplifier, a semiconductor laser, and a VCSEL using the method. These optical elements include a...
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6925840 |
Method of making a photonic crystal preform
Disclosed is a method of making a photonic crystal optical fiber preform by stacking and bonding individual glass disks. In one embodiment, each glass disk has a pattern of voids formed...
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6925237 |
High figure of merit dispersion compensating fiber for standard single mode fiber and transmission system utilizing same
A dispersion compensating optical fiber that includes a segmented core having a central core segment, a moat segment, and a ring segment wherein the ring segment is preferably offset from the moat...
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6922514 |
Optical fiber having low non-linearity for WDM transmission
An optical transmission fiber has a refractive index profile with an area of increased index of refraction at the inner core of the fiber, an annular region positioned radially outward from the...
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6922503 |
Optical system module
An optical module comprises a multiplexer for combining a signal and a pump radiation and having an output coupled to an optical fiber and a signal over the optical fiber with the pump lightwave...
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6920271 |
Reduced polarization mode dispersion fiber
Disclosed is an optical waveguide fiber having a reduced PMD and a method of making the optical waveguide fiber. The optical waveguide fiber in accord with the invention has a particular spin...
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6915053 |
Microstructured optical fiber and optical module
A microstructured optical fiber is structured with a core region and a plurality of cladding regions surrounding the core region. Chromatic dispersion is relatively flat over a broad wavelength...
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6909557 |
Optical coupling system and optical device using the same
Two lenses are used for forming a collimator parallel pair, in which the distance between the two lenses is substantially made coincident with the maximum distance allowing beam waists to be formed...
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6904215 |
Low macrobending loss optical fiber
The present invention provides an optical fiber suitable for the manufacture of optical fiber couplers and having low macrobending loss, low cutoff wavelength, low attenuation, and low sensitivity...
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6904198 |
Device for coupling light into the fiber
An optical source is provided to the side of a fiber. The fiber is a single mode fiber which has a core and a cladding. The Bragg grating is written into the core at a low angle. Light emitted from...
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6899470 |
Systems and methods for fabricating low-loss, high-strength optical fiber transmission lines
Systems and techniques are described for fabricating a low-loss, high-strength optical transmission line. In one described technique, a first fiber is spliced to a second fiber at a splice point....
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6901196 |
Optical fiber having a lower bending loss
An optical fiber includes a first core having a relative refractive index difference of larger than 0.36%, and a cladding. The optical fiber has fiber cut-off wavelength λc of more than 1350 nm,...
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6901195 |
Optical fiber and an optical transmission system using the optical fiber
An optical fiber suitable for the WDM transmission in the wavelength bands of 1.31 μm and 1.55 μm is provided. An optical fiber is characterized by a zero dispersion wavelength of longer than...
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6898360 |
Sectionally photosensitive optical waveguides
An optical waveguide, such as an optical fiber, including a length of waveguide and at least one discrete longitudinal section having increased photosensitivity with respect to other portions of...
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6895153 |
Optical fiber for wavelength division multiplex transmission networks
An optical fiber has three or four core slices including one or more buried slices and a raised central slice. The buried slice or each of the buried slices is very deeply buried. The fiber has a...
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6895154 |
Photonic crystal optical waveguides having tailored dispersion profiles
An optical waveguide having a working mode with a tailored dispersion profile, the waveguide including: (i) a dielectric confinement region surrounding a waveguide axis, the confinement region...
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6890589 |
Self-formable optical waveguide material composition
Into a mixture solution 2 of a high-refractive-index photo-curable resin A and a low-refractive-index photo-curable resin B, light capable of curing only the resin A is led through an optical...
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6888993 |
Dispersion compensating optical fiber for SMF and transmission link including same
A DCF for compensating for the accumulated dispersion of a length of SMF in the C+L band window that includes a core surrounded by a cladding layer of refractive index Δ c . The core includes at...
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6888984 |
Amorphous silicon alloy based integrated spot-size converter
A photonic device suitable for being optically coupled to at least one optical fiber having a first spot-size, the device including: at least one photonic component; and, a graded index lens...
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6885802 |
Network for distributing signals to a plurality of user equipment
A network for distributing signals to a plurality of user having a distribution unit and a plurality of optical cables adapted to make the distribution unit communicate with the plurality of user...
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6882788 |
Optical fibre
The present invention relates to an optical fibre mainly consisting of silica glass, which fibre comprises:
i) an inner core having a first refractive index n1 and a first diameter a; ii) an...
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6879762 |
Optical transmission line and optical transmission system using optical transmission line
Disclosed is an optical transmission line having a length L of 30 km to 150 km, preferably 30 km to 70 km, an absolute value of a dispersion not smaller than 8 ps/nm/km at a wavelength of 1.55 μm...
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6876794 |
Multi-waveguide layer H-tree distribution device
An optical network is formed of multiple H-tree distribution devices, separated into different waveguide layers. The optical network receives an input optical signal, such as an optical clock...
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6873776 |
Waveguide fiber for dispersion and slope compensation
Disclosed is a total dispersion and total dispersion slope compensating optical waveguide fiber. The refractive index profile of the compensating waveguide fiber includes a core region having a...
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6873775 |
Graded-index optical fiber
An optical fiber having a core that has a graded refractive index profile is disclosed. A clad surrounds the core and traps light within the core. A difference between differential mode delays...
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