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WO/2002/029981A2 |
A method and system for AO3R functionality is presented. The system includes an AO2R device followed by an AOCR clock recovery module and an AOR retiming device. The AOR retiming device takes as input a recovered clock signal extracted f...
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WO/2002/019755A2 |
Embodiments of the present invention provide an integrated wavelength converter and optical router which is based on an optical device which includes upper and lower waveguide structures. The upper wave guide structure includes first and...
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WO/2002/005026A2 |
A wavelength converter with a monolithically integrated delay loop in a delayed interference configuration that needs only one SOA or other non-linear optical element coupled to the input fiber, a first coupler to arranged to split the o...
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WO/2001/098826A1 |
A direct ultrahigh speed conversion method in which a signal pulse light (3, 3') having an adequate spatial width and a reference extremely short pulse light (4) are simultaneously made to enter an ultrahigh-speed optical storage device ...
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WO/2001/098825A1 |
The apparatus (10) comprises a laser (12) for producing a first pulsed beam of radiation in a band other than the mid infra-red, and a substrate (14) coated with a phosphor which, when excited by the laser (12), produces a pulsed beam of...
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WO/2001/079927A2 |
A process shifts wavelengths of optical pulses. The process includes transmitting an incoming optical pulse through a nonlinear optical material, splitting the transmitted pulse into a plurality of mutually coherent optical pulses, and r...
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WO/2001/074112A1 |
An optical tunable filter/wavelength converter comprises an input for multiple wavelength traffic carrying signals $g(l)�1?-$g(l)�m?, an output for converted wavelength carrying signals ($g(l)�1?\'-$g(l)�m?\'), means (20) for rou...
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WO/2001/069841A1 |
The invention concerns a controllable low proton source with predetermined wavelength. The invention is characterised in that said source comprises a solid material (10) wherein are implanted in diluted concentration luminescent elements...
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WO/2001/067649A1 |
The invention relates to a device for detecting the PMD of optoelectronic transmission lines. The inventive device is characterized in that it comprises a narrow-band, tuneable laser, whose illumination is superimposed with the illuminat...
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WO/2001/065308A2 |
A wavelength division multiplexing (WDM) optical communication system (100) includes a wavelength converter/switch based on EIT (electromagnetically induced transparency), refers to the elimination of resonant absorption on an otherwise ...
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WO/2001/050189A1 |
An optical wavelength converter simple in structure and high in practicality. When the intensity (power) of a controlling light to be input from a controlling light input unit (2) to a resonance type semiconductor optical amplifier (1) g...
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WO/2001/035501A2 |
A semiconductor device for modulating an optical power light beam (85) with an optical signal light beam (84) contains a detector diode (64) for absorbing the signal beam and a quantum well modulator diode (62) for absorbing the power be...
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WO/2001/029992A1 |
A method and apparatus for optical frequency modulation discrimination. An optical beam is split into a first optical beam and a second optical beam. A first photodetector is provided, the first photodetector providing a first current re...
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WO/2001/024431A1 |
A method of encoding control information on an optical data signal to be transmitted through an optical network, comprising operating an optical source to generate a substantially coherent continuous-wave light beam, amplitude-modulating...
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WO/2001/024329A1 |
A semiconductor tunable laser (10) and an interferometer (12) coupled to the tunable laser (10) are monolithically fabricated in a semiconductor heterostructure. The laser also comprises a buried ridge stripe waveguide laser. The interfe...
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WO/2001/023947A1 |
A method for encoding information that is encoded in spatial variations of the intensity of light (24) of a first wavelength into light of a second wavelength, the method comprising: generating a first density distribution of electrons h...
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WO/2001/023956A2 |
A radiation source comprising a frequency conversion member (1) configured to emit a beam of emitted radiation (7) with at least one frequency in the range from 0.1 THz to 100 THz, in response to irradiation with an input beam (3) with a...
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WO/2001/018955A1 |
A method and apparatus for generating microwave signal frequencies. An incident reference signal is provided. A first stimulus signal is also provided, the first stimulus signal having a first polarization and having a first predetermine...
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WO/2001/004693A2 |
A method and apparatus for implementing digital optical logic using terahertz optical asymmetric demultiplexers (TOADs). An apparatus is described for implementing, for example, the AND and INVERT logic operations using TOADs, such as, b...
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WO/2000/077956A1 |
A method and apparatus (10) are provided for transmitting (12, 14) and receiving (24, 26) multiple RF/microwave subcarriers on a single optical wavelength over an optical link. The method includes the steps of modulating a plurality of R...
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WO/2000/076036A1 |
The present invention relates to an apparatus for providing orthogonally polarized light beams for use in precision metrology applications such as in the measurement of length or length changes using interferometric techniques. An input ...
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WO/2000/073848A2 |
An optical pulse generator having a high order transfer function that comprises a first and a second nested interferometric modulator, each modulator comprising an optical input, an electrical input, a first arm, a second arm and an opti...
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WO/2000/070302A1 |
The invention relates to a device for detecting optical signals or for generating optical signals by the modulation of optical carriers. Said device comprises the following: elements for generating at least one reference light beam, whos...
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WO/2000/054340A1 |
Concentrator for use with photovoltaic devices includes a waveguide (2) incorporating quantum dots. The quantum dots red-shift the incident radiation to produce red-shifted radiation which is internally reflected within the waveguide (2)...
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WO/1999/059010A1 |
The present invention relates to a fiber grating which introduces a plurality of asymmetric microbends in a fiber. The present invention also relates to fiber optic devices, such as a fiber-optic filter, a fiber-optic polarizer, a fiber-...
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WO/1999/050628A1 |
This invention relates to optical devices such as a fiber-optic frequency shifter and an optical interferometer. This invention also relates to a method of generating optical interference signals to obtain reliable sensor signals indepen...
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WO/1999/041855A2 |
In an optical transmission system a transmitter (2) generates a sequence of time domain division multiplexed pulses and transmits them via an optical transmission medium (4) to a receiver (6). In the receiver (6) the received optical mul...
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WO/1999/030393A1 |
Electro-optical devices comprising a multifaceted anisotropic acousto-optical crystal (47) for transforming a single-frequency beam comprising two individual linearly-orthogonally, polarized input beams (18, 19) into an output beam havin...
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WO/1999/025081A1 |
There is provided an optical wavelength converter which allows the rapid and efficient shifting of information modulated on a light signal of one wavelength to a light signal of a second wavelength without the negative effects of noise a...
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WO/1999/021053A1 |
A soliton pulse generator is formed by providing an input continuous wave, stimulating Brillouin scattering of an input wave having a frequency determined by the frequency of the input continuous wave to generate a backscattered wave, co...
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WO/1999/000697A1 |
Disclosed is an all waveguide fiber wavelength converter which makes use of modulational instability to convert signal wavelength over a conversion bandwidth while maintaining a low pump laser power relative to other wavelength conversio...
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WO/1998/020376A1 |
All-optical logic gates in which binary words are encoded using wavelength. A method and apparatus for processing information in this wavelength encoded format is provided. The processing may occur entirely in the optical domain. This ap...
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WO/1997/030372A1 |
A method of, and an apparatus for, extracting with high reproducibility a photo response having sufficient magnitude and sufficient speed from a photo responsive optical element. Control light is emitted from a light source (1) and signa...
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WO/1997/019527A1 |
A coherent receiver for electromagnetic radiation comprising an input optics means (10) for collecting an input signal of electromagnetic radiation at a frequency FS, an optical local oscillator (100) for generating an optical signal at ...
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WO/1997/019504A1 |
A frequency synthesizer (300) includes an optical delay line (322) for delaying one optical signal from a coupler (308) relative to a second optical signal. The optical signals are obtained by mixing radiation from two lasers (304, 306) ...
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WO/1997/002634A1 |
The invention concerns a wavelength converter for converting a first light signal used for data-transmission and having a first wavelength ('lambda'In) into a second light signal having a second wavelength ('lambda'Out). The wavelength c...
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WO/1996/041405A1 |
A semiconductor optical amplifier (A1) has an optical path from its input (3) to its output (4) through an optical amplification region, the path having a length (L) that exceeds 1mm. In use, the amplifier is fed at its input with a modu...
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WO/1996/033535A1 |
An optical frequency generator has an optical comb generator (1) with which because of optical non-linearities around a central frequency a plurality of sidebands may be generated whose frequency spacing is given by the sending frequency...
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WO/1996/022562A1 |
An optical switch includes a semiconcuctor gain medium and inputs for an optical control signal applied to the semiconductor gain medium. The switch has a pair of arms (31, 32) arranged in a Mach-Zehnder configuration. A semiconductor ga...
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WO/1996/008887A1 |
An optical pulse propagating in an optical guide of an electro-optic medium (104) interacts with a coplanar RF traveling wave to shift the optical wavelength. The RF phase is resynchronized to the optical pulse with spatial periodicity t...
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WO/1995/027921A1 |
A modulation rate amplification device, in particular for microwave amplification. The device includes a system for causing interference between two optical waves which have the same amplitude but are frequency-shifted. The system may be...
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WO/1995/022783A1 |
An optical device comprises an optical fibre directional coupler having at least a first optical fibre (10) optionally coupled at a coupling region (30) to a second optical fibre (20) such that light can propagate in the coupling region ...
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WO/1995/022080A1 |
A device for converting a mid-wave infrared or long-wave infrared thermal image into a coherent near-infrared image includes a two-dimensional array of quantum-well-based optical modulators (500) and infrared photodetectors (100). Each m...
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WO/1995/010870A1 |
An optical pulse sequence is generated by applying a repetitive optical signal to an optical modulator connected in the laser cavity of a mode-locked laser. The pulse sequence in the laser cavity is then ouput. The repeat period of the r...
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WO/1995/010795A1 |
A non-linear optical switch includes a semiconductor optical gain medium. The switch is arranged to switch a signal at a first wavelength in response to a control signal at a second wavelength applied to the optical gain medium. The refr...
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WO/1995/010895A1 |
To provide a light detection system, which reduces the optical transmission losses due to the use of an analyzer on a spacial transmission path, reduces the photodetection losses in changing the optical power level for polarization and s...
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WO/1994/024588A1 |
Optical systems are disclosed which are capable of generating and rapidly changing time delays of electrical signals for true time delay beam formation and beam steering and for signal processing applications. The systems utilize an inte...
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WO1994006054A1 |
A non-linear semiconductor optical device (3) comprises an active waveguide with a multiple quantum well construction in the active region. The device (3) is supplied with a drive current at the material transparency current with respect...
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WO/1994/006053A1 |
The proposal is for an integrated opto-acoustic component to shift light frequencies, in which two separated light guides (11, 12) have an optical coupling region (13) formed in the manner of a directive coupler in which the two light gu...
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WO/1993/025934A1 |
The object of the invention is to provide a method which makes it possible to determine the correlation between two optical signals, which makes it possible to correlate two optical signals, without using a crystal element which is assoc...
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