Matches 251 - 300 out of 556 < 1 2 3 4 5 6 7 8 9 10 11 12 >
Match Document Document Title
6707980 Variable attenuator for optical fiber applications  
A variable attenuation device for optical signal transmission has first and second ferrules or plugs having abutting end faces, one of the ferrules being rotatable with respect to the other while...
6707979 Optical loop-back attenuator  
An optical loop-back attenuator ( 2 ) includes a frame ( 22 ), a cover ( 21 ) attached to the frame, an optical fiber ( 24 ), an optical fiber fixture ( 23 ) retaining and fixing the optical fiber,...
6707981 Variable optical attenuation collimator with controllable light blocking mechanisms  
A concept of designing a Variable Optical Attenuation Collimator (VOAC) is disclosed to achieve a variable degree of optical power attenuation through the collimator by adding an Attenuation...
6707969 Digital thermo-optic switch integrated with variable optical attenuators  
Disclosed is a thermo-optic (TO) switch that reduces the difficulty in the fabrication process and has an excellent optical crosstalk. In the TO switch, variable optical attenuators utilizing...
6701089 Over-equalization for multi-span wavelength division multiplexed fiber optic communication systems  
In an amplified wavelength division multiplexes (WDM) fiber optic communication system, each channel experiences a different optical gain, dispersion and noise. Also, the evolution of WDM fiber...
6697547 Wavelength power equalization by attenuation in an optical switch  
A method for equalizing optical signal power in a group of optical signals transmitted through an optical switch in an optical transmission system. In one embodiment a group of optical signals is...
6697561 Variable optical attenuation collimator  
A Variable Optical Attenuation Collimator (VOAC) is disclosed to achieve a variable degree of optical power attenuation through the collimator by adding an Attenuation Control Element (ACE) between...
6684022 Manual variable optical attenuator having sealing gasket  
A manual variable optical attenuator ( 10 ) includes a base ( 2 ), a cover ( 3 ), an optical module ( 4 ), a shifting device ( 5 ), and an optical fiber retainer ( 6 ). The optical module comprises...
6681073 Fiber optic power control systems and methods  
Control systems and methods are provided for controlling optical energy transmitted through a fiber optic. The systems and methods employ a digital controller circuit coupled to at least one sensor...
6674953 Controllably variable optical attenuator  
A controllable attenuator includes a pair of collimators respectively connected to input and output fibers. A pair of reflection devices are respectively positioned behind the pair of collimators...
6671439 Integrated waveguide arrangement, process for producing an integrated waveguide arrangement, and waveguide components  
The invention explains, inter alia, integrated waveguide arrangements in which a waveguide with glass core and glass sheath is arranged in a waveguide layer consisting of glass. A foreign region...
6669375 Multi-fiber, in-line attenuator module and assembly for optoelectronic networks  
A multi-fiber in-line attenuator module configured for insertion in the fiber optic pathway of an optoelectronic network to provide a predetermined value of attenuation for all propagating modes in...
6665464 Optical function module having removable optical function unit  
An optical function module comprises a collimator block having a substrate, at least two collimators disposed on the substrate in confronting relation to one another for collimating a light flux...
6665472 Optical filter having cascaded long-period gratings  
An optical filter has a first long-period grating and a second long-period grating formed in a unitary optical fiber. A difference is not less than 100 nm between a wavelength at which optical...
6661963 System and method for calibrating and operating a semiconductor variable optical attenuator  
A method and apparatus for controlling the attenuation level of a semiconductor VOA relative to an absolute temperature of the VOA without the use of a power monitor is provided. The method...
6658213 Modulation controlling circuit  
The invention relates to a modulation controlling circuit for supplying a modulating signal to an external modulator that outputs a modulated optical signal, while setting a proper operating point...
6658178 Optical communications equipment  
A highly reliable optical communications equipment is offered, which can control light more accurately than heretofore (i.e., less restrictions are imposed on the amount of attenuation and on the...
6658174 Push-pull thermo-optic switch  
A thermo-optic interferometer switch is arranged to operate in a Push-pull mode by placing approximately a quarter-wavelength effective path-length difference (90 degree bias) between the arms of...
6654538 Technique for realizing attenuators for optical fibers with attenuating fiber  
The attenuator for optical fibers with attenuating fiber according to the present invention comprises an optical fiber having a profile of reflective index with partially depressed cladding, of a...
6636654 Programmable optical switching add/drop multiplexer  
A multi-channel optical switching system particularly usable as a programmable optical add/drop multiplexer (POADM) in a multi-wavelength communication system. The switching system uses a thin film...
6636682 Variable optical attenuator having integrated reflective device  
An electrical variable optical attenuator includes a housing ( 1 ), a cover ( 2 ), an optical module ( 3 ), and a shifting device ( 4 ). The optical module comprises a reflective device ( 31 ), a...
6636657 Channelized wavelength division multiplex equalizer using reflective attenuators  
A channelized Wavelength Division Multiplex (WDM) equalizer enables the gain of each WDM channel to be individually controlled, enabling power adjustments of each channel over the equalizer's...
6636681 Optical attenuator  
A variable optical attenuator having a multiple quantum well structure (MQWS), a feedback system that provides a feedback signal, and a current control that utilizes the feedback signal to regulate...
6631238 Variable optical attenuator  
Randomly polarized light impinges upon a birefringent crystal, is split into orthogonal polarization components and emerges from the crystal separated by a walk-off distance. The light beams then...
6631227 Information recording and reproducing apparatus  
An information recording and reproducing apparatus for at least one of recording and reproducing information on a recording medium utilizing near-field light has a suspension arm and a near-field...
6631224 Tunable filter with core mode blocker  
An optic apparatus includes an optical fiber with a cladding surrounding a core and a core-mode blocker included in at least a portion of an interactive region of the optical fiber. A mode coupler...
6628852 Isolation device  
An isolation device that can be used for providing optical and electrical isolation between areas of an integrated chip. The isolation device includes three doped elongate regions which form diodes...
6628882 VOA device and attenuation method with improved linearity  
A variable optical attenuator, or VOA, for attenuating an optical signal between two photonic components by changing an alignment of a light beam with an output photonic component in at least two...
6628392 Light modulation apparatus and optical switch, movement detecting device and distance measuring device, alignment device and semiconductor aligner, and processes thereof  
Disclosed herein is a light modulating apparatus comprising first and second two periodic structures each having a period smaller than the wavelength of light emitted from a light source, and a...
6625378 Variable optical attenuator device  
A variable optical attenuator device is provided for modulating an optical signal. The attenuator device includes a variable attenuation assembly with an electrochromic structure interposed between...
6621953 Optical arrangement for transmitting short laser pulses in optical fibers  
The invention relates to an optical arrangement for transmitting short laser pulses in optical fibers ( 2 ), especially for injection into a laser microscope, preferably for use in two-photon laser...
6621952 In-fiber variable optical attenuators and modulators using index-changing liquid media  
Fiber optical devices formed on substrates fabricated with grooves that operate based on evanescent optical coupling through a side-polished fiber surface in each fiber involved. An index-changing...
6614958 Optical imaging system  
An optical system for imaging an input beam from an input to an output beam at an output. The system includes a lens adapted for receiving the input beam from the input, and a reflecting device...
6614982 Variable optical attenuator  
A variable optical attenuator is provided, and in one embodiment, a communication beam and associated alignment beam are generated by a beam generating element. The alignment beam may later be...
6614016 Method for optically determining the position of a movement element and sensor for implementing the method  
A method for optically determining the position of a movement element optically includes introducing the light emitted by a light source into an optical conductor which causes attenuation of the...
6612754 Method and apparatus for splicing optical fibers  
A fiber splicing apparatus of the present invention includes a support ( 120 a, 120 b ) for supporting the two optical fibers ( 112 a, 112 b ) such that the ends ( 114 a, 114 b ) thereof are...
6611649 Variable optical attenuator with polarization maintaining fiber  
An electrically controllable, variable optical attenuator (VOA) is disclosed, in which polarization maintaining fiber is employed. The fiber is modified to expose the evanescent field of optical...
6606447 Optical attenuator including dual control loops  
The present invention provides an optical attenuator comprising an optical attenuator module, an optical splitter, a detector and a control unit. Input radiation (P i ) is received at the...
6604865 Optical plug-in connector having optical waveguides held in ferrules for the pluggable connection to a counterplug  
For optical waveguide connections that can be freely laid for transmitting optical signals, there is proposed, in accordance with the dimensions specified by the MOST Co-operation of the automobile...
6606446 Miniature variable attenuator  
An improved optic attenuator controllably filters an optical signal after the signal has been expanded and collimated. The optical signals are preferably expanded and refocused by a single GRIN...
6603902 Wavelength selective variable reflector  
An arrangement is provided having an optical waveguide, a Chirp grating and an electro-optic material arranged adjacent the Chirp grating, the electro-optic material, for example liquid crystal...
6599024 Fiber optic adapter with attenuator and method  
The present invention relates to a fiber optic device for the optically connecting optical fiber. The device consists of fiber optic connectors holding the terminal ends of optical fiber in...
RE38205 Variable attenuator connector  
The disclosure describes a connector for fiber optic transmission cables, incorporating into it a variable attenuator. The variable attenuation is achieved by having a screw arrangement vary an air...
6590684 Optical system  
A system for individually controlling the chromatic dispersion of one or more wavelength division multiplexed (WDM) optical signals, chromatic dispersion is compensated a plurality if individually...
6587632 Thermo-optic tunable optical attenuator  
Disclosed is a thermo-optic tunable attenuator, which comprises a single mode channel optical waveguide, an optical waveguide of a Mach-Zehnder interferometer structure coupled with the single mode...
6587288 Optical attenuation filter  
An attenuation filter contains absorbing thin film layers, which comprise gray metals or metal compounds. The attenuation filter offers significant advantages when used in optical communication...
6584271 Dual fiber variable optical attenuator  
A variable optical attenuator ( 200 ) comprises a dual fiber collimator ( 202 ) and a reflection component ( 206 ) separated by a linear moveable ND filter ( 204 ). The collimator ( 202 ) includes...
6580868 High-resolution variable optical attenuator with mechanical adjustment  
A mechanically-adjustable variable optical attenuator includes a beam attenuator shaped as a concave quasi-cone. The beam attenuator has a sharp tip and a base, and can be rotationally symmetric...
6574413 Arrangement and method for the channel-dependent attenuation of the levels of a plurality of optical data channels  
The invention relates to an arrangement and a method for the channel-dependent attenuation of the levels of a plurality of optical data channels which each transmit signals of a specific...
6563965 Analog optical switch using an integrated Mach-Zehnder interferometer having a moveable phase shifter  
Optical devices employing a Mach-Zehnder interferometer (“MZI”) device having a phase shifter provided in one arm that enables the construction of significantly smaller optical devices than...
Matches 251 - 300 out of 556 < 1 2 3 4 5 6 7 8 9 10 11 12 >