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6600842 |
Semiconductor optical function device
A semiconductor optical function device has a first junction structure part which includes a first conductivity type cladding layer, a light waveguide layer and a second conductivity type cladding...
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6594421 |
Dynamically reconfigurable composite grating filters for temporal waveform processing
Programmable waveguide coders are disclosed that include one or more corrugation segments and one or more spacer segments formed on or in a waveguide defined by a core in an electro-optic...
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6591023 |
Optical transmitter having a modulation-capable wavelength-stable laser source
An optical transmitter having a modulation-capable wavelength-stable laser source is proposed, the signal of the laser source passing through at least one Michelson band-pass filter to prevent...
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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...
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6584239 |
Electro optic modulator
A doped slab region is described for use around a ridge waveguide, for controlling the refractive index of the waveguide material. Instead of simply diffusing dopant in from a surface of the slab...
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6583917 |
Optical intensity modulation device and method
An optical intensity modulator for high-speed RZ and NRZ data modulation based on a balanced three-arm Mach-Zehnder interferometer. The three arms are joined at the input and output sides of the...
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6584260 |
Electro-optical device and a wavelength selection method utilizing the same
A method and an electro-optical device are presented for affecting the propagation of input light impinging on the device. The electro-optical device is composed of at least one domain-patterned...
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6580540 |
Time compensation architectures for controlling timing of optical signals
A time compensation architecture for use with a plurality of optical signals is disclosed. It comprises means for receiving the plurality of optical signals, optical means for selectively delaying...
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6574380 |
Tapped delay line-based configurable spectral filter with in-situ monitoring
A method of modifying the spectral distribution of an optical signal includes the steps of splitting the signal among a plurality of optical paths, delaying the propagation of the signal through...
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6574379 |
Optical device and its manufacturing method
An optical device having superior frequency characteristics and high optical axis stability. The back surfaces of an optical modulator and a pair of transmission lines are bonded to a pedestal with...
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6571043 |
Large screen fiber optic display with high fiber density and method for its rapid assembly
This invention encompasses a method for the manufacture and rapid assembly of large screen fiber optic displays ( 1, 2 ) containing a very large number of individual fibers (thousands to hundreds...
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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...
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6556736 |
Dynamic passband shape compensation of optical signals
The curvature, tilt, and attenuation of the passband of an optical signal is dynamically controlled by an integrated compensator that is advantageously electrically operated. The compensator...
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6539137 |
Thermo-electric signal coupler
A signal coupler is comprised of a transmitting section and a receiving section. The receiving section includes a polymer pyroelectric film element having a greater than 1% by volume of a high...
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6529646 |
Optical modulator
An optical modulator includes an optical input; an optical output; at least one optical path connecting the optical input and output; and an electrode structure for selectively changing the optical...
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6522793 |
Low voltage electro-optic modulator with integrated driver
An electro-optic modulator is provided which comprises an electro-optic substrate, a Mach-Zehnder Interferometer optical waveguide structure, and at least two electrodes. In an embodiment of the...
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6519374 |
Predistortion arrangement using mixers in nonlinear electro-optical applications
A predistortion arrangement is described for using an input signal to drive a nonlinear device having a drive input. Initially, first means sample a portion of the input signal. The sampled portion...
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6512866 |
High efficiency channel drop filter with absorption induced on/off switching and modulation
A highly efficient channel drop filter. The filter employs a coupling element including a resonator-system between two waveguides, which contains at least two resonant modes. The resonator-system...
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6510255 |
Optical transmission apparatus
In an optical transmission apparatus including an external optical modulator for modulating an optical carrier from a light source with an electrical signal, bias voltage applied to the external...
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6501866 |
Method and apparatus for cross-connecting optical transmission signals
Method and apparatus are contemplated for electrical-to-optical conversion coupled to an electrical switching fabric, wherein the number of lasers supplying optical carrier beams in...
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6483954 |
Method and apparatus for coupling to regions in an optical modulator
An optical switch having regions to which conductors are coupled outside an optical path of the optical switch. In one embodiment, the disclosed optical switch includes a plurality of first...
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6483955 |
Diffraction grating device
This invention relates to a diffraction grating device having a refractive index modulation formed in an optical waveguide region in a predetermined region in the longitudinal direction of the...
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6480637 |
Fiber squeezer polarization controller with low activation loss
An improved polarization control method and apparatus is provided. The described invention uses super-polished squeezing surfaces to apply pressure thereby minimizing micro-bending effects that...
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6470102 |
All-polymer waveguide polarization modulator and method of mode profile control and excitation
A circular polarization modulator operable to output light alternating in time between left-hand and right-hand circular is provided. The circular polarization modulator preferably comprises three...
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6470104 |
Method and apparatus for switching an optical beam by modulating the phase of a portion of the optical beam in a semiconductor substrate
A device for switching an optical beam in an optical switch. In one embodiment, the disclosed optical switch includes an optical switching device disposed in a semiconductor substrate. The optical...
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6459832 |
Method and apparatus for optical signal transmission using multiple sub-signals of non-uniform bandwidth
An optical medium containing a transport signal that has a plurality of sub-signals, each sub-signal being characterized by a known wavelength of light and a known bandwidth, the bandwidth of the...
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6453103 |
Optical communication system
An optical communication system having a structure for effectively suppressing occurrence of a nonlinear optical phenomenon in WDM transmission in the 1.58 pm wavelength band. The optical...
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6438277 |
Stabilized thermally tunable optical waveguide devices and communication systems employing them
In accordance with the invention, a thermally tunable optical waveguide device is stabilized against ambient changes. Specifically, a feedback signal derived from a temperature-dependent resistance...
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6424754 |
Optical modulator responsive to at least two electric signals
First and second AC electric sources modulate a coherent wave constant amplitude optical beam. An optical waveguide arrangement responsive to the optical wave, includes first and second pairs of...
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6418255 |
Device for modulation of optical radiation and transmission of information
The invention concerns to area of magneto-optics, nonlinear-optics, fiber optics. The invention allow to amplify Faraday effect drastically and obtain a high level of modulation of optical...
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6415083 |
Traveling wave electro-optic modulator based on an organic electro-optic crystal
An electro-optic modulator, a system including an electro-optic modulator, and a method for producing an electro-optic modulator, which provides improved modulation sensitivity and improved...
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6411421 |
Optical short pulse generator
The present invention relates to an optical short pulse generator using an EA modulator. In addition to continuous wave light for generating an optical short pulse train, pump light for generating...
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6400490 |
Mach-Zehnder optical modulator
An optical modulator is provided that not only can realize a suitable initial operating point without using dc voltage for control, but that has little optical loss and can obtain an excellent...
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6396971 |
Optical digital waveform generator
A method and a system for generating optical waveforms from electrical signals is disclosed. An input electrical signal is sampled to obtain a single channel data which is converted to...
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6396985 |
Contoured large screen display apparatus
An apparatus for use in contoured architectural milieus includes a contoured large screen display having a mounting means to which modular flat display tiles including, tiles of diverse or...
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6392781 |
High speed semiconductor optical modulator and fabricating method thereof
The present invention relates to an electrical field absorbing semiconductor optical modulator, more particularly, to a high speed semiconductor optical modulator and a fabricating method thereof....
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6377717 |
Optical modulators
The optical modulator comprising an optical input signal waveguide, first and second interferometric waveguide arms, a modulated output signal waveguide, a splitter for dividing the input signal...
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6377716 |
Optical intensity modulator and switch comprising the same
An optical intensity modulator is disclosed which comprises a waveguide containing a core adjacent to at least one cladding layer and exhibits a refractive index n(core) different from the...
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6366730 |
Tunable optical waveguides
The specification describes thermo-optically controlled waveguides where the thermo-optic control is a heater strip precisely aligned to the waveguide core by using the heater strip as an etch mask...
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6356693 |
Semiconductor optical pulse compression waveguide
A semiconductor optical pulse compression waveguide with a novel structure that can greatly reduce its size, and be simply fabricated. The semiconductor optical pulse compression waveguide is...
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6356673 |
Low loss coplanar waveguide horn for low drive LiNbO3 modulators
A low loss coplanar waveguide horn with low drive voltage LiNbO 3 modulators wherein the electrical transmission of the traveling wave electrode structure, and of the input and output coupling...
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6346430 |
Packaged integrated processor and spatial light modulator
An integrated circuit die may have a processor and a spatial light modulator formed in the same die. An opening may be provided in an interposer to allow light to reach the spatial light modulator....
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6341184 |
Low drive voltage optical modulator
An optical modulator that includes a resonator near one arm of a Mach-Zehnder interferometer and that increases the optical length of that arm so as to introduce a phase-shift in an optical signal...
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6339660 |
Device and method for writing on imaging material with an integrated waveguide
A device and a method is proposed for writing on imaging material ( 3 ) with a radiation source ( 1 ) producing an electromagnetic radiation having a wavelength suitable for recording image...
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6337755 |
Polarization independent all-optical regenerators
In an all-optical regenerator, an optical input signal having N wavelength division multiplexed (WDM) channel signals is demultiplexed and each channel signal is directed onto a separate optical...
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6337762 |
All-optical switch and wavelength converter
An all-optical switch for outputting output light by transmitting/interrupting second input light with a second wavelength synchronizing with first input light with a first wavelength. The...
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6332050 |
Optical slab waveguide for massive, high-speed interconnects
Optical slab waveguides are used as high-speed, high-capacity interconnects for parallel or other devices. Optical slab interconnects can connect to many more elements than can conventional...
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6330266 |
Method for selecting a semiconductor integrated optical modulator/laser light source device
The present invention provides a method for selecting a semiconductor integrated optical modulator/laser light source device comprising a modulator section and a laser section. The method comprises...
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6327396 |
Optical waveguide having an optically decoupled modulator region
An optical waveguide, such as a rib waveguide, having a first portion (7) to which a dopant (9) and/or a metal layer (10) is applied to enable an optical property of a second portion of the...
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6324318 |
Redundant optical source switching method and wavelength division multiplexing transmission apparatus using the same
A redundant switch method includes a step of producing a substitute light of a wavelength identical to that of a faulty working light source which is one of working light sources having different...
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