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8170385 Light coupler and manufacturing method thereof  
The present invention provides a light coupler and a manufacturing method thereof. The light coupler of the invention includes a plurality of light input terminals, a plurality of light output...
8164831 Optical depolarizers and DGD generators based on optical delay  
Techniques and devices for depolarizing light and producing a variable differential group delays in optical signals. In one implementation, an input optical beam is split into first and second...
8160405 Optical integrated circuit  
Consistent with the present disclosure, a non-adiabatic polarization rotator is provided that can rotate the polarization of an incoming over a relatively short length. Light is supplied to the...
8150219 Waveguide-type optical interferometer  
In an optical interferometer, polarization dependence attributable to the optical path difference has conventionally been eliminated by inserting a half-wave plate at the center of the...
8139903 Driving circuit of optical gate switch  
A driving circuit of a semiconductor optical amplifier type gate switch constituting a matrix optical switch is provided with an operation amplifier into which a driving signal is input and from...
8131120 Planar polarization splitter  
An apparatus comprising a planar optical structure that includes an input coupler, first and second planar waveguides and an output coupler, all on a planar substrate. The input coupler is...
8128271 Light coupling into films  
A light emitting sign including a lightguide having a thickness not greater than 0.5 millimeters. The lightguide having an array of elongated legs extending therefrom, wherein each leg terminates...
8121475 Optical signal quality monitor for a high-bit rate signal  
An optical signal quality monitor includes a splitter splitting an input optical signal into two signals; a low-frequency converter converting one split optical signal to a low frequency signal by...
8115998 In-line optical isolator  
In an in-line optical isolator, a first polarization separation element 91, a Faraday rotator 6 made of a BIG film, and a second polarization separation element 92 are placed in that order. The...
8107819 Systems and methods for interference prediction  
An optical network device of a passive optical network is introduced. The optical network device includes a light source, a control unit, and a variable optical attenuator. The light source can...
8103140 Interferometric fiber optic gyroscope with silicon optical bench front-end  
Method and apparatus are provided for a silicon substrate optical system for use in an interferometric fiber optic gyroscope (IFOG). A silicon substrate of the silicon substrate optical system is...
8098991 Wideband RF photonic link for dynamic co-site interference mitigation  
A method is provided for co-site interference mitigation in an RF communication system. Spectral nulls created in an optical domain may be used to mitigate interfering signals in an RF signal. The...
8094978 Polarization rotator and method for manufacturing the same  
An optical circuit comprises: a first waveguide; a second waveguide: and a third waveguide that converts mode field and direction of polarization of light of said first waveguide at the same time...
8094979 Polarization-based optical switching  
An optical switch, comprising a plurality of light inputs and a plurality of light outputs. The switch additionally includes a polarization beam splitter, configured to split light beams received...
8078019 Optical wavelength selective router  
A fiber-optical, wavelength selective switch, especially for channel routing with equalization and blocking applications. The input signals are converted to light beams having predefined...
8059965 Polarization mode dispersion compensation  
Methods and systems for PMD compensation in an optical communication system are implemented by transmitting multiple optical signals through a common optical conduit to an optical compensator that...
8050524 Optical device and method related thereto  
An optical device includes an electrooptic crystal substrate, a polarization-inverted region formed in a part of the electrooptic crystal substrate, an optical waveguide formed in the electrooptic...
8041162 Delivering light via optical waveguide and multi-view optical probe head  
Techniques, apparatus and systems that use an optical probe head to deliver light to a target and to collect light from the target for imaging, monitoring, medical diagnostics and medical treatment...
8023833 Optical receivers with controllable transfer function bandwidth and gain imbalance  
Techniques, devices and systems based on optical receivers with controllable transfer function bandwidth and gain imbalance.
RE42678 Reconfigurable optical add-drop multiplexers with servo control and dynamic spectral power management capabilities  
This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral...
8005322 Polarization-independent optical isolator  
It is provided a polarization-independent optical isolator without depending on the polarized wave of the light being input to the waveguide-type optical isolator, in particular, it is able to...
8000007 Polarization filter utilizing Brewster's angle  
A polarization filter utilizing Brewster's angle. The polarization filter includes a stimulus receiving body having more than one facet. At least two of the more than one facet being arranged at...
7995893 Magnetic material for magneto-optical isolator  
A magneto-optical structure is provided. The magneto-optical structure includes a substrate. A waveguide layer is formed on the substrate for guiding electromagnetic radiation received by the...
7983573 Optical receiver having FSR phase compensation  
An optical receiver apparatus and methods for mitigating intersymbol interference (ISI) in a differentially-encoded modulation transmission system by controlling constructive and destructive...
7983515 Polarization maintaining optical fiber polarizer  
A novel in-fiber polarizer is provided that is implemented in an optical fiber structure based on a polarization maintaining (“PM”) optical fiber, and that is configured to impart a pre...
7983570 Direct detection differential polarization-phase-shift keying for high spectral efficiency optical communication  
Efficient apparatus, methods, systems and devices to generate, transmit and detect optical differential polarization-phase-shift keying signals are disclosed for high spectral efficiency optical...
7983567 Method and system for polarization modem dispersion compensation  
The invention relates to a method and a system for controlling a PMD compensator (2). For this purpose, a measuring signal (MS) is branched off from an already compensated optical data signal...
RE42521 Reconfigurable optical add-drop multiplexers employing polarization diversity  
This invention provides a novel wavelength-separating-routing (WSR) apparatus that uses a diffraction grating to separate a multi-wavelength optical signal by wavelength into multiple spectral...
7974540 Communication system and communication method using the same  
A communication system capable of employing polarization-dependent phase modulators with a reversing configuration that preserves security against disturbance of a polarization state at a...
7972017 Optical element having a diffractive layer and a relief pattern with concave and convex portions  
An optical element, includes: a diffractive functional layer which diffracts at least part of incident light; and a grid formed on a first surface of the diffractive functional layer, the grid...
7970248 Photonic bandgap fibers  
Included among the many structures described herein are photonic bandgap fibers designed to provide a desired dispersion spectrum. Additionally, designs for achieving wide transmission bands and...
7959308 Substrate-guided display with improved image quality  
A guiding-substrate display may include an angle-mapped display engine to generate a modulated photonic output having angle-mapped rays responsive to an electrical signal without the use of an...
7949212 Optical waveguide element and method for polarization splitting  
Disclosed is an optical waveguide element that includes first and second optical waveguides (11, 12) which are formed to have different waveguide modes of guided lights, whose polarized waves are...
7949260 Evaluation and adjustment method of optical receiver and optical communication system  
An evaluation method of an optical receiver of an optical communication system, including a DPSK (Differential Phase Shift Keying) signal modulated by a specific data series, a delay interferometer...
7941012 Phase-engineered fibers for use in generating cylindrical vector beams  
A phase-engineered fiber is described for generating a cylindrically polarized beam. The fiber includes a core region, a ring region surrounding the core region, and an outer cladding region...
7924493 Faraday rotator mirror and method for manufacturing the same  
A Faraday rotator mirror which is compact, allows high workability of manufacturing and has high reliability and high coupling efficiency is provided. The Faraday rotator mirror comprises a...
7909958 Apparatus and method for optical switching with liquid crystals and birefringent wedges  
An optical switch includes an optical waveguide to route an input optical beam. At least one polarization switch receives the input optical beam from the optical waveguide. At least one...
7907798 Systems and methods for polarization mode dispersion mitigation  
In one exemplary embodiment, a method comprises transmitting an optical signal via the optical line, measuring a relative change in spectral intensity of the optical signal near a clock frequency...
7869716 Method and apparatus for broadband mitigation of polarization mode dispersion  
Described is a method and system for reducing system penalty from polarization mode dispersion. The method includes receiving a plurality of signals at a receiving end of a transmission line, each...
7853104 Bidirectional optical module and optical time domain reflectometer  
A bidirectional optical module according to the present invention emits light to an optical fiber and allows returning light from the optical fiber to enter and includes a plurality of light...
7844147 Dynamic waveform shaping in a continuous fiber  
A system for dynamic waveform shaping in an optical fiber comprising: the optical fiber receiving an optical waveform, the optical waveform having individual spectral lines; a plurality of fiber...
7840100 Devices for dispersion compensation, beam displacement, and optical switching  
A method of laterally displacing at least a component of a light beam, the method comprising: a) directing the beam to enter a block of birefringent material at a first location, and at least the...
7831114 Tunable dispersion compensator with minimum differential group delay  
In a method and system for providing dispersion compensation in an optical system, there is coupled into the optical system at least one pathway into which there is connected a tunable chirped...
7826137 Reflective optical circulator  
Provided is a reflective optical circulator capable of improving characteristics by preventing the occurrence of PDL and non-uniformity of insertion losses of reciprocating optical paths. The...
7822298 Polarization component processor, method of processing polarization components and integrated photonic circuit employing the same  
An apparatus and a method by which polarization components may be processed separately, for example, to enable a polarization beam splitter (PBS) or a switch. In one embodiment, the apparatus...
7822303 Optical wavelength selective router  
A fiber-optical, wavelength selective switch, especially for channel routing with equalization and blocking applications. The input signals are converted to light beams having predefined...
7813040 Multi-stage optical isolator  
A double stage isolator is formed of face-to-face slabs or sheets of materials that will suitably split, combine, non-reciprocally rotate to ensure isolation in a reverse direction from output...
7813032 Methods to control phase shifts of delay demodulation devices  
The present invention provides methods to control phase shift of delay demodulation devices to reduce Polarization Dependent wavelength (PDλ) to be less than, for example, 0.5 GHz (i.e. 0.004 nm). ...
7792403 Adiabatic polarization converter  
The present invention relates to a waveguide structure, and methods for making the same. The waveguide structure has a polarization rotator for rotating the polarization of the electromagnetic...
7787715 TE-TM mode converter  
A TE-TM mode converter is provided which is capable of performing a TE-TM conversion in a wide bandwidth. In a TE-TM mode converter using an electrooptic effect, a waveguide is formed on a...
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