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5982958 Optical waveguide modulator device  
An improved optical waveguide device having an optical waveguide for guiding a lightwave comprises, on a surface of a substrate having an electrooptical effect, at least a pair of electrodes...
5970188 Method and apparatus for controlling an optical signal  
The invention is a method and apparatus that provides for the control of optical signals in a polarization-independent manner using birefringence. The invention includes an optical coupler...
5966476 Spatial switch using an optical beam steering device  
A spatial switch of a simple structure using a "M×N" optical beam steering device which operates with M "1×N" spatial switches using a phased optical waveguide array. The spatial switch using an...
5949941 Cladding-pumped fiber structures  
A cladding-pumped fiber structure is disclosed in which mode mixing of pump light injected into the fiber is induced by index modulation. In one embodiment, the index modulation is created by a...
5949925 Method, device, and system for optical modulation in wavelength division multiplexing  
An optical modulator including an optical waveguide structure and a selective modulation unit. The optical waveguide structure guides wavelength division multiplexed light including a plurality of...
5937118 Quantum synthesizer, THz electromagnetic wave generation device, optical modulation device, and electron wave modulation device  
A device capable of obtaining an electromagnetic wave having an arbitrary waveform and an arbitrary frequency, generating an electromagnetic wave with an ultrahigh frequency, generating an...
5917969 Laser modulator  
An all-optical modulator for modulating the output power of a high-power optical pump source is disclosed. More particularly, with the optical modulator of the invention, the output power of a CW...
5917648 Packaged optical amplifier assembly  
A packaged optical amplifier assembly includes an erbium doped silica based optical amplifying fiber (330) co-pumped and counter-pumped by a pair of laser diodes (336) as optical pumps. The optical...
5911015 Polarization-independent Kerr modulator, and an all-optical clock recovery circuit including such a modulator  
The invention relates to a Kerr type optical modulator and to an all-optical clock recovery circuit operating by active mode locking of a fiber loop laser including such a modulator. Operation is...
5907645 Liquid crystal ferroelectric electro-optical phase modulators which are insensitive to polarization  
The modulator is formed by a smectic chiral ferroelectric C* liquid crystal cell (CL), crossed by the light signal which is transmitted by the said fibre. The cell (CL) is provided with transparent...
5903684 Independent control of one of normally interdependent light transmission characteristics of optical fiber  
A method and apparatus for controlling polarization, as one of a pair of erdependent light characteristics of an optical fiber, in response to a time dependent signal without the introduction of...
5903683 Device for modulating an optical signal using a single wave guide  
The present invention is a device for adding delay and compensating for dispersion in an optical signal. In a first embodiment, the present invention is made up of a waveguide, preferably an...
5898517 Optical fiber modulation and demodulation system  
A fiber optic modulation and demodulation system is disclosed. The system is configured as telemetry system for relaying signals from sensors in remote, harsh environments. Light is modulated using...
5892857 Electro-optic compound waveguide intensity modular and method using same  
An electro-optic modulator is disclosed in the form of a compound waveguide device having a channel waveguide in optical proximity to an elongate waveguide propagating an optical signal therein....
5887092 Optical non-linear branching element with MZ interferometer  
A low-loss optical 1×2 branching element comprises a symmetrical coupler (C s ) with a symmetrical power distribution (1/2/1/2) and an asymmetric coupler (C a )with an asymmetric power...
5879824 Magnetostatic wave device and material for the same  
A magnetostatic wave device comprising a magnetic garnet single crystalline film having a general formula of R 3 -x Ca x Ma 5 -2y+x Zr y Mb y -x O 12 wherein R is at least one of Y, La, Bi, Gd,...
5867615 Compact straight channel fiber optic intensity modular  
Two modes in the waveguide are excited by establishing the input light polarization at forty-five degrees so that the modes can be excited equally. After propagating through the waveguide, the two...
5848205 Polarization independent non-linear optical mirror  
The invention relates to a non-linear optical mirror comprising an optical fiber loop that operates independently of the polarizations of the signals of respective wavelengths λ s and λ c ...
5835642 Optical fiber interferometer and piezoelectric modulator  
The invention is related to technical physics, in particular to devices for investigating the internal structure of objects and can be used in medicine for diagnostics of human organs and systems,...
5835258 Device for amplification of amplitude modulation ratio of an optical beam  
The invention relates to a modulation ratio amplification device, particularly for amplification at UHF. This device comprises means for making two optical waves, which are of the same amplitude...
5822471 Differential optical modulator  
A differential optical modulator for modulating an optical beam with a forward propagating path includes a polarization component to polarize the optical beam and provide redirection of the optical...
5812707 Polarizer housing device for connecting a polarizer to an optical waveguide  
An apparatus, such as an optical modulator, which includes an optical waveguide and a polarizer housing device. The optical waveguide has an input end to receive light, and the polarizer housing...
5808779 Optical fiber modulation and demodulation system  
This invention is directed toward a fiber optic modulation and demodulation system, and more particularly directed toward a telemetry system for relaying signals from sensors in remote, harsh...
5802222 Color image generation systems and applications  
Color image generation systems are disclosed for the reproduction of real or virtual, two-dimenional or three-dimensional, color, or monochrome images and their applications, in particular for...
5796880 Technique for modulating optical signals in optical communications  
In an optical transmitter, an input optical fiber delivers an optical signal to a fiber coupling modulator whose reflective surface is transformable in response to the data to be transmitted. In a...
5781327 Optically efficient high dynamic range electro-optic modulator  
An electro-optic modulator and a method for its use, in which an optical carrier is effectively suppressed for transmission of a radio-frequency (rf) modulating signal over an optical communication...
5778112 Waveguide polymer electro-optic modulator/switch  
An improved waveguide polymer electro-optic modulator/switch which is operated in a single mode and has an improved device characteristic compared to the optimized modulator/switch and is capable...
5771257 Light absorption modulator and integrated semiconductor laser and modulator  
A light absorption modulator includes a semiconductor substrate of a first conductivity type; a first cladding layer of the first conductivity type disposed on the substrate; an optical waveguide...
5768449 Optical transmission system and optical transmission method  
When an electric signal outputted from a signal source (101) is converted to a light signal in an electrica-optical converting portion (104), a distortion component such as secondary or tertiary...
5764842 Semiconductor guided-wave optical device and method of fabricating thereof  
After a shadow mask that is separate from a semiconductor substrate is used and is arranged over the semiconductor substrate via a wafer holder installed in a reaction chamber of a vapor-phase...
5764406 Hydrid optical amplifier having improved dynamic gain tilt  
A hybrid, erbium doped fiber amplifier device has a dynamic gain tilt that is less than the gain tilt of any of the constituent fibers. The hybrid amplifying device has at most one less pumping...
5757985 Semiconductor mach-zehnder-type optical modulator  
In a semiconductor Mach-Zehnder modulator, when a phase modulator portion 113 and other passive areas (incident light waveguide path 111, a branch portion 112, a joint portion 114 and an output...
5757984 Electro-optic optical modulating apparatus  
An electro-optic optical modulating apparatus comprises an optical waveguide, which has electro-optic effects, and at least a single pair of electrodes, which are located in the vicinity of the...
5757541 Method and apparatus for an optical fiber amplifier  
An amplifier method and apparatus for use with optic systems utilizing a fiber optic circulator to direct input signals to a splitter that splits the copropagating pump light and input signals into...
5745613 Wavelength-division multiplexing optical communication apparatus and method therefor  
A wavelength division-multiplexing optical communication apparatus and method includes a plurality of modulators for respectively modulating the intensity of a plurality of light rays, each having...
5739944 Support system for resonating element of phase modulator  
A phase modulator is provided with supports attached to the resonating element. The supports have a length which is an odd number of quarter wavelengths of a longitudinal acoustic wave excited in...
5732167 Optical fiber sensor for measuring a magnetic field or electric current and method for making the same  
An optical fiber sensor which is adapted for use in combination with a horseshoe-type iron core comprises a substrate having a groove pattern established by a pair of elongated spaced, parallel...
5729641 Optical device employing edge-coupled waveguide geometry  
An optical device for modulating or interacting with radiation guided and propagating along an optical longitudinal axis of an optical waveguide, such as, an optical fiber, has a different...
5724464 Compound optical waveguide device  
A compound optical waveguide device which is of a reduced size has an optical waveguide chip, a photodiode, and a laser diode. The optical waveguide chip has a substrate of LiNbO 3 , a Y-shaped...
5719971 Strain based optical fiber systems  
Optical systems use tuning of in-fiber gratings to provide an optical crossbar switch matrix of switch elements. The switch elements have a drop tap and an insert tap. A combination of the switch...
5703708 Adjustable optical delay line  
When merging optical pulse streams having a high bit rate, there is the problem that, for example given a bit rate of 40 Gbit/s, the pulses at the multiplexer output have 25 pulses temporal spacing...
5701378 Optical structures with two optical guidance paths  
An optical structure having two optical guidance paths between which coupling occurs in a band about one predetermined wavelength is manufactured by providing an optical structure having two...
5689362 Acousto-optic deflector device  
An acousto-optic deflector device having a piezoelectric thin film and IDT formed on a substrate for deflecting a light by causing an SAW generated at an SAW generator region to interact with the...
5682445 Strain based optical fiber devices  
Optical fiber devices include optical fibers having grating portions with in-fiber gratings having optical characteristics which are changed by the use of strain inducing members. The strain...
5675674 Optical fiber modulation and demodulation system  
This invention is directed toward a fiber optic modulation and demodulation system, and more particularly directed toward a telemetry system for relaying signals from sensors in remote, harsh...
5671301 Optical phase modulator for high resolution phase measurements  
A pocket-type apparatus for non-invasive measurement of blood glucose concentration based on producing a polarized-modulated laser beam via an optical phase shifter (32), measuring a phase...
5652808 Acoustic-optical device for optical filtering  
An acoustic-optical device for optical filtering includes two successive acoustic-optical interaction segments separated by an intermediate polarizer and each modifying the polarization of light...
5644665 Multi-octave, high dynamic range operation of low-biased modulators by balanced detection  
An optical link is disclosed that is operated by a balanced detection technique so as to extend its linear dynamic range, yet substantially eliminate even-order harmonic distortion of the modulated...
5636054 Regulated optical amplifier having an optical circulator  
An optical amplifier of the type including an inlet for a light signal to be amplified and an outlet for an amplified light signal that has been amplified by means of an amplifying waveguide that...
5625722 Method and apparatus for generating data encoded pulses in return-to-zero format  
A method and apparatus for converting a non-return-to-zero (NRZ) voltage data stream into an optical data stream in return-to-zero (RZ) format, is disclosed comprising supplying a continuous...
Matches 301 - 350 out of 550 < 1 2 3 4 5 6 7 8 9 10 11 >