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151.发明申请公开(公告)号：US20210075507A1
公开(公告)日：2021-03-11
申请号：US17024239
申请日：2020-09-17
申请人： VIAVI SOLUTIONS INC.
发明人： Georg Rudolph
IPC分类号： H04B10/079 , H04J14/06
摘要： An apparatus for mitigating polarization dependent loss (PDL) in an optical signal-to-noise ratio (OSNR) of a modulated optical signal is disclosed. The apparatus may comprise a spectrum analyzer to measure an optical power spectrum of a modulated optical signal. The apparatus may also comprise a measuring unit to select a first portion of the modulated optical signal and a second portion of the modulated optical signal, where each of the first and second portions of the modulated optical signals may include an independent noise distribution indicative of PDL, and measure a time-varying parameter of the first and second portions. The apparatus may also include a signal processor to PDL in an OSNR by transforming any elliptical polarization associated with the independent noise distribution into a ball polarization, determining a correlation between time-varying parameters of the first and second portions, and calculating a PDL mitigated OSNR.
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公开(公告)号：US20210041905A1
公开(公告)日：2021-02-11
申请号：US16537073
申请日：2019-08-09
申请人： VIAVI SOLUTIONS INC.
发明人： Jonathan Paul MILTON
摘要： A system for determine presence or quality of an external timing device is provided. The system may include a circuit (e.g., in a field-programmable gate array (FPGA)) having an input, an oscillator, an edge detector, a bit counter, and a calculator element. In some examples, the input may receive an input signal under test. The oscillator may advance a timer at a known rate to facilitate generation of clock samples for the input signal under test. The edge detector may measure edges of the input signal under test based on the clock samples. The circuit may include at least one bit counter to store a count associated with the measured edges for a shorter interval timer period and a longer interval timer period. The calculator element may determine presence or quality of an external timing device based on the count.
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153.发明授权公开(公告)号：US10914655B2
公开(公告)日：2021-02-09
申请号：US16152046
申请日：2018-10-04
申请人： VIAVI SOLUTIONS INC.
发明人： Charlène Roux , Olivier Receveur
IPC分类号： G01M11/02 , G01M11/04 , G01M11/06 , G01M11/00 , H01L21/768
摘要： In some examples, an optical time-domain reflectometer (OTDR) device may include a laser source to emit a laser beam into a device under test (DUT), and a connection port to connect the OTDR device to a first end of the DUT, where the OTDR device may be designated a first OTDR device. A sensor display generator may determine a length of the DUT, receive, from a second OTDR device connectable to a second opposite end of the DUT, and over the DUT, OTDR information acquired by the second OTDR device in a direction from the second OTDR device towards the first OTDR device, and ascertain, based on acquisition by the first OTDR device, further OTDR information in a direction from the first OTDR device towards the second OTDR device. The sensor display generator may generate a bi-directional combined schematic display that includes relevant optical events with respect to the DUT.
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公开(公告)号：US20210018664A1
公开(公告)日：2021-01-21
申请号：US16946977
申请日：2020-07-14
申请人： VIAVI Solutions Inc.
发明人： William D. HOUCK , Daniel MEYSING
IPC分类号： G02B5/28
摘要： An optical filter may comprise a first pair of mirrors, a second pair of mirrors, and a common spacer. The second pair of mirrors and the first pair of mirrors may reflect different portions of an electromagnetic spectrum. The common spacer may be positioned between the first pair of mirrors and between the second pair of mirrors.
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公开(公告)号：US20200338922A1
公开(公告)日：2020-10-29
申请号：US16857845
申请日：2020-04-24
申请人： VIAVI SOLUTIONS INC.
IPC分类号： B42D25/369 , B42D25/328
摘要： An optical device comprising a structured substrate; a reflective layer on the structured substrate; and a coating with magnetic flakes on the reflective layer is disclosed. A method of making and using an optical device is also disclosed.
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公开(公告)号：US10801918B2
公开(公告)日：2020-10-13
申请号：US16024227
申请日：2018-06-29
申请人： VIAVI SOLUTIONS INC.
IPC分类号： G01M11/00
摘要： A test instrument tests an optical component of a fiber optic network. The test instrument determines signal parameters describing pulses to be emitted by lasers of the test instrument to test the optical component, and directly modulates the lasers to repeatedly emit the pulses at different wavelengths on a single fiber optic cable in a time division multiplexing manner. The test instrument triggers powering measurements to coincide with the emitted pulses, and determines performance parameters of the optical component based on the triggered power measurements.
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公开(公告)号：US10782460B2
公开(公告)日：2020-09-22
申请号：US15601753
申请日：2017-05-22
申请人： Viavi Solutions Inc.
发明人： Georg J. Ockenfuss
摘要： An optical filter may include a substrate. The optical filter may include a first mirror and a second mirror. Each of the first mirror and the second mirror may include a plurality of quarterwave stacks. The plurality of quarterwave stacks may include a plurality of layers comprising a first material, a second material, and a third material. The optical filter may include a spacer disposed between the first mirror and the second mirror.
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公开(公告)号：US10775246B2
公开(公告)日：2020-09-15
申请号：US15945501
申请日：2018-04-04
申请人： VIAVI SOLUTIONS INC.
发明人： Vincent Lecoeuche
摘要： In some examples, a temperature distribution sensor may include a laser source to emit a laser beam that is tunable over a wavelength range. The wavelength range may be less than a Raman bandwidth in a device under test (DUT), or of-the-order-of the Raman bandwidth in the DUT. A pulsed source may apply a pulse drive signal to the laser beam or to a modulator to modulate the laser beam that is to be injected into the DUT. A bandpass filter may be operatively disposed between the laser source and the DUT, and may be configured to an anti-Stokes wavelength that is narrower than the Raman bandwidth. A photodiode may be operatively disposed between the bandpass filter and the DUT to acquire, from the DUT, anti-Stokes optical time-domain reflectometer traces for two preset wavelengths of the laser beam to determine a temperature distribution for the DUT.
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公开(公告)号：US10740027B2
公开(公告)日：2020-08-11
申请号：US15395889
申请日：2016-12-30
申请人： Viavi Solutions Inc.
发明人： Samuel M. Bauer
IPC分类号： G06F3/0481 , G06F11/14 , G06F3/06 , G11C7/10 , H04L12/24
摘要： A method of storing log entries of events from a plurality of network elements in a communication network, comprising the steps of: a) receiving log entries at a control processor of events from a plurality of different elements positioned, the log entries grouped into threads based on a common purpose; b) converting each log entry into a compact log record in a logging module, and c) storing the compact log records in a first memory buffer in random access memory (RAM) forming a first log file.
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160.发明申请公开(公告)号：US20200244357A1
公开(公告)日：2020-07-30
申请号：US16836607
申请日：2020-03-31
发明人： Jeffrey Abramson Heath , Eric Walter Hakanson , Dmitriy Yavid , Christopher Silvio Cosentino , Stuart William Card
摘要： A system for troubleshooting signals in a cellular communications network, and in particular, for determining the cause of distortion or corruption of such signals, includes a robotic or other type of switch. The robotic switch can tap into selected uplink fiber-optic lines and selected downlink fiber-optic lines between radio equipment and radio equipment controllers in a wireless (e.g., cellular) network to extract therefrom the I and Q data. The selected I and Q data, in an optical form, is provided to an optical-to-electrical converter forming part of the system. The system includes an FPGA (Field Programmable Gate Array) or the like, and an analytic computer unit, or web server, and SSD (Solid State Drive) and magnetic disk storage, among other components of the system. The system analyzes the I and Q data provided to it, and determines the cause, or at least narrows the field of possible causes, of impairment to transmitted signals. The system includes a display which provides the troubleshooting information thereon for a user of the system to review, or other form of a report, and may communicate the analytical findings to a remote location over a public or private internet protocol network.
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