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公开(公告)号：US20210325245A1
公开(公告)日：2021-10-21
申请号：US16849552
申请日：2020-04-15
Applicant: VIAVI SOLUTIONS INC.
Inventor： Driss TOUAHRI , Christopher Russell Wagner
Abstract: A system for a high resolution optical spectrum analyzer (OSA) using an efficient multi-pass configuration is disclosed. The system may include an entrance slit to allow inward passage of an optical beam. The system may also include a grating element to diffract the optical beam. The system may further include a retroreflective element to retroreflect the optical beam. The system may also include a mirror to reflect the optical beam. The system may include an exit slit, which in some examples may be adjacent to the entrance slit. The exit slit may allow outward passage of the optical beam for a high resolution optical measurement.
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2.发明授权公开(公告)号：US11821791B1
公开(公告)日：2023-11-21
申请号：US17850201
申请日：2022-06-27
Applicant: VIAVI SOLUTIONS INC.
Inventor： Driss Touahri , Christopher Russell Wagner , Luis Andre Neves Paiva Fernandes , Joshua Benjamin Julius Philipson
CPC classification number: G01J3/28 , G01J3/021 , G01J3/0208 , G01J3/14 , G01J3/18 , G01J2003/1208
Abstract: A monochromator apparatus for an optical spectrum analyzer may include a diffraction grating, a rotatable oblique prism reflector element with a non-right-angle apex angle, and a mirror. An input optical beam received from an input component may be diffracted by the grating element and reflected by a reflector element, where the reflector element may include a rotatable oblique prism with an apex angle that is different from a right angle. A mirror may reflect the reflected diffracted optical beam back to the reflector element and the grating element. An output optical beam from the grating element may be provided via an output element to a detection element for high resolution optical measurement. The oblique prism reflector element may reduce or eliminate a Littrow ghost effect or secondary ghost effects caused by the grating element.
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公开(公告)号：US11754862B2
公开(公告)日：2023-09-12
申请号：US17979114
申请日：2022-11-02
Applicant: VIAVI SOLUTIONS INC.
IPC: G02F1/01 , H04B10/532 , H04B10/2569 , H04J14/06 , G02B3/00 , G02B6/27
CPC classification number: G02F1/0136 , G02B3/0087 , G02B6/2786 , H04B10/2569 , H04B10/532 , H04J14/06 , G02F1/0139
Abstract: A polarization scrambler using a retardance element (RE) is disclosed. The polarization scrambler may include an optical fiber input to transmit an optical signal, and a beam expander to receive and expand the optical signal to create an expanded optical signal. The polarization scrambler may include a retardance element (RE) to cause a polarization scrambling effect on the expanded optical signal and to create a scrambled expanded optical signal. The polarization scrambler may include a beam reducer to receive and reduce the scrambled expanded optical signal to create a scrambled optical signal. The polarization to scrambler may include an optical fiber output to receive scrambled optical signal. The optical fiber output may transmit the scrambled optical signal to one or more downstream optical components.
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公开(公告)号：US12038346B2
公开(公告)日：2024-07-16
申请号：US17341261
申请日：2021-06-07
Applicant: VIAVI SOLUTIONS INC.
Inventor： Luis Andre Neves Paiva Fernandes , Robert Matthew Adams , Christopher Russell Wagner , Joshua Benjamin Julius Philipson , Eugene Chan
CPC classification number: G01M11/337 , G02F1/0139
Abstract: According to examples, a system for measuring polarization dependent loss (PDL) for a device-under-test (DUT) may include a tunable laser, a polarization element and a power meter. The tunable laser may emit an optical signal to sweep across an optical band at a constant rate. The polarization element may scramble polarizations states of the optical signal emitted from the tunable laser. The power meter may take power measurements associated with the optical signal emitted from the tunable laser, wherein the power measurements from the power meter are used to determine a maximum insertion loss (IL) and a minimum insertion loss (IL) associated with the device-under-test (DUT). An average insertion loss (IL) and a polarization dependent loss (PDL) for the device-under-test (DUT) may be calculated based on the maximum insertion loss (IL) and the minimum insertion loss (IL) associated with the device-under-test (DUT).
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公开(公告)号：US11639873B2
公开(公告)日：2023-05-02
申请号：US16849552
申请日：2020-04-15
Applicant: VIAVI SOLUTIONS INC.
Inventor： Driss Touahri , Christopher Russell Wagner
Abstract: A system for a high resolution optical spectrum analyzer (OSA) using an efficient multi-pass configuration is disclosed. The system may include an entrance slit to allow inward passage of an optical beam. The system may also include a grating element to diffract the optical beam. The system may further include a retroreflective element to retroreflect the optical beam. The system may also include a mirror to reflect the optical beam. The system may include an exit slit, which in some examples may be adjacent to the entrance slit. The exit slit may allow outward passage of the optical beam for a high resolution optical measurement.
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Patent Agency Ranking
公开(公告)号：US11614360B2
公开(公告)日：2023-03-28
申请号：US17402242
申请日：2021-08-13
Applicant: VIAVI SOLUTIONS INC.
Inventor： Christopher Russell Wagner , Luis Andre Neves Paiva Fernandes , Joshua Benjamin Julius Philipson
Abstract: A system for providing optical measurements and detection in optical spectrum analyzers (OSAs) with high dynamic range and high speed is disclosed. The system may include a slit to allow inward passage of an optical beam. The system may also include an optical portion to receive the optical beam. In some examples, the optical portion may include at least one optical splitter to split the optical beam into at least two optical paths. The system may also include an electrical portion to receive the optical beams split into the at least two optical paths. In some examples, the electrical portion may include at least one photodetector to receive each of the split optical beam. The electrical portion may also include at least one amplifier communicatively coupled to each of the at least one photodetector to amplify the split optical beam. The electrical portion may further include at least one analog-to-digital converter (ADC) communicatively coupled to each of the at least one amplifier to convert the split optical beams into digital signals.
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公开(公告)号：US11353393B2
公开(公告)日：2022-06-07
申请号：US16900519
申请日：2020-06-12
Applicant: VIAVI SOLUTIONS INC.
Inventor： Jeffery Stephen Graves , Elias Debs , Darko Cugalj , Christopher Russell Wagner , Driss Touahri
Abstract: An apparatus for providing an improved coupling link with integrated beam blocking and a bearing assembly using an axial preloading technique is disclosed. The apparatus may include a coupling link comprising a first end, a second end, and a middle section. The middle section may be connectable to a beam blocking element. The first end may include a first bearing assembly and may be connectable to a motor drive arm. The second end may include a second bearing assembly and may be connectable to an optical-mechanical element. In some examples, the apparatus may be used in various optical measurement and testing applications and environments. In some examples, the improved coupling link may also utilize an axial preloading technique to minimize excessive movement in bearings assemblies.
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公开(公告)号：US12222551B2
公开(公告)日：2025-02-11
申请号：US17903401
申请日：2022-09-06
Applicant: VIAVI SOLUTIONS INC.
Inventor： Driss Touahri , Joshua Benjamin Julius Philipson , Christopher Russell Wagner , Luis Andre Neves Paiva Fernandes , Robert Matthew Adams
Abstract: A variable optical attenuator (VOA) may include an input collimator with an input fiber connected on one side and an output collimator with an output fiber connected on one side, where the collimators are on a same surface of a VOA enclosure. A retroreflector may receive a light beam from the input collimator and reflect the light beam to the output collimator. The VOA may include an attenuation element positioned between the input collimator and the retroreflector and/or another attenuation element positioned between the retroreflector and the output collimator to provide variable attenuation to the light beam. The attenuation elements may be moved to set an attenuation level by one or more adjustment elements such as a miniature motor. The attenuation element may include a gradient index (GRIN) element, a polarizer, a neutral density filter, or a wavelength tunable filter.
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公开(公告)号：US20240077678A1
公开(公告)日：2024-03-07
申请号：US17903401
申请日：2022-09-06
Applicant: VIAVI SOLUTIONS INC.
Inventor： Driss TOUAHRI , Joshua Benjamin Julius Philipson , Christopher Russell Wagner , Luis Andre Neves Paiva Fernandes , Robert Matthew Adams
CPC classification number: G02B6/266 , G02B6/2726 , G02B6/3574
Abstract: A variable optical attenuator (VOA) may include an input collimator with an input fiber connected on one side and an output collimator with an output fiber connected on one side, where the collimators are on a same surface of a VOA enclosure. A retroreflector may receive a light beam from the input collimator and reflect the light beam to the output collimator. The VOA may include an attenuation element positioned between the input collimator and the retroreflector and/or another attenuation element positioned between the retroreflector and the output collimator to provide variable attenuation to the light beam. The attenuation elements may be moved to set an attenuation level by one or more adjustment elements such as a miniature motor. The attenuation element may include a gradient index (GRIN) element, a polarizer, a neutral density filter, or a wavelength tunable filter.
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公开(公告)号：US11526035B2
公开(公告)日：2022-12-13
申请号：US16436481
申请日：2019-06-10
Applicant: VIAVI SOLUTIONS INC.
IPC: G02F1/01 , H04B10/532 , H04B10/2569 , H04J14/06 , G02B3/00 , G02B6/27
Abstract: A polarization scrambler using a retardance element (RE) is disclosed. The polarization scrambler may include an optical fiber input to transmit an optical signal, and a beam expander to receive and expand the optical signal to create an expanded optical signal. The polarization scrambler may include a retardance element (RE) to cause a polarization scrambling effect on the expanded optical signal and to create a scrambled expanded optical signal. The polarization scrambler may include a beam reducer to receive and reduce the scrambled expanded optical signal to create a scrambled optical signal. The polarization scrambler may include an optical fiber output to receive scrambled optical signal. The optical fiber output may transmit the scrambled optical signal to one or more downstream optical components.
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