General Photonics Corporation

Other

Suzhou Optoring Technology Co. Ltd.

Xiaojun James Chen

Xiaotian Steve Yao

Lianshan Yan

Hongxin Chen

X Steve Yao

Anton Khomenko

Oleksii Karpenko

Lynn Lin

Yao Yao

Leon Yao

Optical polarization-based devices and techniques are provided to enable low cost construction and easy signal processing to measure the light frequency via measurements of signals associated with a delay between the two orthogonal polarizations after passing through a DGD element and the retardation value of the DGD element without directly measuring the optical frequency. The optical detection may be designed in various configurations. In particular, for example, the optical detection may split the optical output of the DGD into two optical beams with two different optical detectors so that the final frequency information can be deducted into a pair of sine and cosine functions, such as a pair of sine and cosine functions of measured optical signal levels and the retardation value of the DGD element.

Sine-cosine optical frequency encoder devices based on optical polarization properties

Devices, systems and techniques for measuring optical polarization-related parameters in optical materials and devices such as polarization maintaining (PM) fiber links based on polarization crosstalks that spatially distribute over a length of a material such as a PM fiber link.

Complete characterization of polarization-maintaining fibers using distributed polarization analysis

This patent document discloses fiber sensing techniques and devices for shape monitoring by using single- and multi-core optical fiber implementations and optical interferometry. Implementations can be made based on coherent optical time domain reflectometry (OTDR) or optical frequency domain reflectometry (OFDR).

Sensitive optical fiber shape sensing based on shape-related optical polarization evolution

The technology disclosed in this application provide for non-destructive and non-contact optical characterization of fiber reinforced plastic composites and other structures under test based on optical transmission scanning.

Optical characterization of fiber reinforced plastic composites based on optical transmission scanning

The disclosed technology includes, among others, methods and devices for measuring distributed fiber bend or stress related characteristics along an optical path of fiber under test (FUT) uses both a light input unit and a light output unit connected to the FUT at one single end.

Devices and methods for characterization of distributed fiber bend and stress

The disclosed technology in this patent document includes, among others, methods and apparatus for distributed measuring at least one of fiber bend or stress related characteristics along an optical path of a fiber under test (FUT) using both a light input unit and a light output unit connected to the FUT at one single end.

Distributed fiber bend and stress measurement for determining optical fiber reliability by multi-wavelength optical reflectometry

Techniques and devices for measuring polarization crosstalk in polarization maintaining fiber by placing the PM fiber in a 1-dimensional or 2-dimensional configuration for sensing stress or strain exerted on the PM fiber at different locations along the fiber with a high spatial sensing resolution.

1-dimensional and 2-dimensional distributed fiber-optic strain and stress sensors based on polarization maintaining fiber using distributed polarization crosstalk analyzer as an interrogator

The disclosed technology in this patent document includes, among others, methods apparatus for distributed measuring at least one fiber bend or stress related characteristics along an optical path of fiber under test (FUT) uses both a light input unit and a light output unit connected to the FUT at one single end.

Techniques and devices for measuring polarization crosstalk in birefringence optical media including polarization maintaining fiber.

Measuring polarization crosstalk in optical birefringent materials and devices based on reduction of line broadening caused by birefringent dispersion

Techniques and devices use cascaded optical polarization devices having modulated optical retardation to control optical polarization of light and can be configured for polarization scrambling. Uniform rate scrambling and quasi-uniform rate scrambling modes are provided in described devices and rate-additive designs based on multiple cascaded devices are also disclosed to achieve high-speed scrambling.

Polarization scrambling based on cascaded optical polarization devices having modulated optical retardation

Techniques and devices for measuring the distribution of polarization crosstalk in birefringence optical media including polarization maintaining fiber based on suppressing the number and magnitude of ghost interference peaks.

Measuring distributed polarization crosstalk in polarization maintaining fiber and optical birefringent material

Systems, apparatus and methods for characterizing linear retarders using a waveplate analyzer constructed by polarization rotators. In one implementation of such an analyzer, both the retardation of the waveplate sample and the orientation of optical axis of the waveplate sample can be simultaneously measured.

Waveplate analyzer based on multiple tunable optical polarization rotators

Apparatus and methods for scrambling optical modes in multimode fibers to achieve uniform light distribution in guided multi-mode light for various applications.

Mode scrambling apparatus for multimode fiber

Differential group delay (DGD) devices and techniques based on folded optical paths. An in-line polarization monitor can be provided as a feedback for worst-case alignment without using an in-line polarizer. Polarization maintaining retro reflectors can minimize the introduced higher-order polarization effects caused by reflections between folding mirrors or prisms in conventional schemes.

Growing community of inventors

San Gabriel, CA, United States of America

Xiaojun James Chen