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公开(公告)号：US20200292852A1
公开(公告)日：2020-09-17
申请号：US16351131
申请日：2019-03-12
Applicant: VIAVI SOLUTIONS INC.
Inventor： Joshua Philipson , Christopher Russell Wagner
Abstract: A Faraday-based polarization scrambler is disclosed. The Faraday-based polarization scrambler may comprise a first toroidal assembly. The first toroidal assembly may include an optical fiber that is looped to form a first looped portion, and a first electrical wire that coils around the first looped portion to form a first toroidal configuration. In some examples, the first electrical wire may be connected to a voltage source and carries a current to form a magnetic field within the first toroidal configuration. In some examples, there may be additional toroidal assemblies provided to the Faraday-based polarization scrambler. One or more of these toroidal assemblies may create an actuation field to effect modulation for polarization scrambling and emulation that mitigates polarization-dependent effects.
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Patent Agency Ranking
公开(公告)号：US12216002B2
公开(公告)日：2025-02-04
申请号：US17716585
申请日：2022-04-08
Applicant: VIAVI SOLUTIONS INC.
Inventor： Christopher Russell Wagner
Abstract: A system for amplification of optical signals for optical measurement instrumentation is disclosed. The system may include a first logarithmic amplifier circuit in a first amplification path, and a linear amplifier circuit and a second logarithmic amplifier circuit coupled in series in a second amplification path. The first and second amplification paths may receive an input signal from a photodiode and provide amplified signals, in parallel, to a selection circuit, which may select one of the outputs of the first and second amplification paths based on one or two power thresholds. The selection circuit may then provide the selected output to a measurement circuit or device. In some examples, the system may also include a sampling circuit to sample the outputs and an analog-digital conversion circuit to digitize the outputs before selection. The power threshold(s) may be determined based on a saturation level of the linear amplifier circuit.
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13.发明授权公开(公告)号：US12174066B2
公开(公告)日：2024-12-24
申请号：US18486355
申请日：2023-10-13
Applicant: VIAVI SOLUTIONS INC.
Abstract: A system for a high resolution optical spectrum analyzer (OSA) using various optical configurations to reduce polarization dependent loss (PDL) is disclosed. The system may include a birefringent element to receive an input optical beam. The birefringent element may then split the optical beam into at least two exit beams. The system may also include an optical configuration comprising at least one optical element. The optical configuration may receive the at least two exit beams from the birefringent element and transform at least one of the two exit beams using the at least one optical element to provide two parallel beams with parallel polarizations. The optical configuration may then output the two parallel beams with parallel polarizations to a downstream optical element, such as a diffraction grating, or other optical element.
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公开(公告)号：US12007631B2
公开(公告)日：2024-06-11
申请号：US18359678
申请日：2023-07-26
Applicant: VIAVI SOLUTIONS INC.
IPC: G02F1/01 , G02B3/00 , G02B6/27 , H04B10/2569 , H04B10/532 , H04J14/06
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 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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15.发明授权公开(公告)号：US11828648B2
公开(公告)日：2023-11-28
申请号：US17334132
申请日：2021-05-28
Applicant: VIAVI SOLUTIONS INC.
CPC classification number: G01J3/0224 , G01J3/447
Abstract: A system for a high resolution optical spectrum analyzer (OSA) using various optical configurations to reduce polarization dependent loss (PDL) is disclosed. The system may include a birefringent element to receive an input optical beam. The birefringent element may then split the optical beam into at least two exit beams. The system may also include an optical configuration comprising at least one optical element. The optical configuration may receive the at least two exit beams from the birefringent element and transform at least one of the two exit beams using the at least one optical element to provide two parallel beams with parallel polarizations. The optical configuration may then output the two parallel beams with parallel polarizations to a downstream optical element, such as a diffraction grating, or other optical element.
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公开(公告)号：US11125617B1
公开(公告)日：2021-09-21
申请号：US16849599
申请日：2020-04-15
Applicant: VIAVI SOLUTIONS INC.
Inventor： Christopher Russell Wagner , Luis Andre Neves Paiva Fernandes , Joshua Benjamin Julius Philipson
IPC: G01J3/02
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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