Inventor · disambiguated record
Ezra Ip
Also filed as: IP EZRA
43 granted patents·9 pending applications·89 citations·filing 2009–2025
96Inventor score
Top patents by PatentIndex Score
52 records- 0197US11920975B2Repeater design for distributed acoustic sensing on multispan fiber linksNEC LAB AMERICA INC·Filed 2021·Granted Mar 5, 2024·5 cites·10 claims
- 0297US11566937B2Rayleigh fading mitigation via short pulse coherent distributed acoustic sensing with multi-location beating-term combinationNEC LAB AMERICA INC·Filed 2020·Granted Jan 31, 2023·4 cites·2 claims
- 0397US11391622B2Optical fiber sensing system with reduced spatial resolution and noise for multiple application usesNEC LAB AMERICA INC·Filed 2020·Granted Jul 19, 2022·5 cites·4 claims
- 0493US10917168B2Optical fiber sensing systems, methods, structures and applicationsNEC LAB AMERICA INC·Filed 2019·Granted Feb 9, 2021·6 cites·3 claims
- 0591US12332394B2Fiber sensing using supervisory path of submarine cablesNEC LAB AMERICA INC·Filed 2022·Granted Jun 17, 2025·2 cites·1 claims
- 0691US12206489B2Long distance distributed fiber optic sensing (DFOS) and WDM communications over repeated fiber spans using all-raman amplification and coding schemesNEC LAB AMERICA INC·Filed 2023·Granted Jan 21, 2025·1 cites·2 claims
- 0789US10345138B2Method to increase the signal to noise ratio of distributed acoustic sensing by spatial averagingNEC LAB AMERICA INC·Filed 2016·Granted Jul 9, 2019·4 cites·19 claims
- 0889US8600242B2Power optimization of optical receiversJI PHILIP N·Filed 2011·Granted Dec 3, 2013·9 cites·20 claims
- 0988US11982552B2Vibration detection using phase recovered from an optical transponder with coherent detectionNEC LAB AMERICA INC·Filed 2021·Granted May 14, 2024·1 cites·8 claims
- 1088US9733108B2Method and apparatus for remote sensing using optical orbital angular momentum (OAM)-based spectroscopy for detecting lateral motion of a remote objectNEC LAB AMERICA INC·Filed 2015·Granted Aug 15, 2017·5 cites·18 claims
- 1187US9130679B1Polarization-switched differential ternary phase-shift keyingIP EZRA·Filed 2012·Granted Sep 8, 2015·13 cites·8 claims
- 1286US10107651B2Low-complexity brillouin optical time-domain reflectometers using syb-nyquist samplingNEC LAB AMERICA INC·Filed 2017·Granted Oct 23, 2018·3 cites·12 claims
- 1385US11378443B2Performance of Rayleigh-based phase-OTDR with correlation-based diversity combining and bias removalNEC LAB AMERICA INC·Filed 2020·Granted Jul 5, 2022·2 cites·4 claims
- 1482US11296786B2Constant amplitude coded DFOS using out-of-band signalingNEC LAB AMERICA INC·Filed 2021·Granted Apr 5, 2022·1 cites·1 claims
- 1582US9813158B2Multimode elliptical core optical data transmissionNEC LAB AMERICA INC·Filed 2016·Granted Nov 7, 2017·4 cites·7 claims
- 1677US8767288B2Multimode optical amplifier with close-loop modal gain controlBAI NENG·Filed 2012·Granted Jul 1, 2014·6 cites·19 claims
- 1775US11543287B2Distributed acoustic sensing using multi-band time-gated digital orthogonal frequency domain reflectometryNEC LAB AMERICA INC·Filed 2021·Granted Jan 3, 2023·0 cites·9 claims
- 1875US8725006B2Digital signal-to-signal beat noise reduction for filter-less coherent receiving systemHUANG YUE-KAI·Filed 2011·Granted May 13, 2014·4 cites·24 claims
- 1974US9813155B2Bi-directional transmission over an elliptical core optical fiberNEC LAB AMERICA INC·Filed 2016·Granted Nov 7, 2017·2 cites·21 claims
- 2073US11461635B2Neural network transfer learning for quality of transmission predictionNEC LAB AMERICA INC·Filed 2018·Granted Oct 4, 2022·2 cites·17 claims
- 2168US9369211B2Optical square QAM signal emulation using all-optical PAM to QAM signal conversionNEC LAB AMERICA INC·Filed 2014·Granted Jun 14, 2016·2 cites·18 claims
- 2268US8798480B2High-speed optical 8-QAM modulation by cascading dual-drive mach-zehnder modulator with I/Q modulatorNEC LAB AMERICA INC·Filed 2012·Granted Aug 5, 2014·2 cites·2 claims
- 2367US11320304B2Multi-frequency coherent distributed acoustic sensing (DAS) with single transmitter / receiver pair using offset Tx / Rx frequency framing schemeNEC LAB AMERICA INC·Filed 2020·Granted May 3, 2022·0 cites·10 claims
- 2467US10741992B2Extending system reach of unrepeated systems using cascaded amplifiersNEC LAB AMERICA INC·Filed 2017·Granted Aug 11, 2020·1 cites·4 claims
- 2567US2025146843A1Inline fiber type identificationNEC LAB AMERICA INC·Filed 2024·Application pending·0 cites
- 2666US11733088B2Spatial averaging method for coherent distributed acoustic sensingNEC LAB AMERICA INC·Filed 2021·Granted Aug 22, 2023·0 cites·9 claims
- 2766US10887009B2G-OSNR estimation on dynamic PS-QAM channels using hybrid neural networksNEC LAB AMERICA INC·Filed 2019·Granted Jan 5, 2021·1 cites·5 claims
- 2866US9160480B2Symmetric coherent OFDMA-PON configuration with low-speed ONU-sideCVIJETIC NEDA·Filed 2012·Granted Oct 13, 2015·2 cites·11 claims
- 2964US12287234B2Distributed acoustic sensing sensitivity enhancement using MIMO sampling and phase recombinationNEC LAB AMERICA INC·Filed 2022·Granted Apr 29, 2025·0 cites·3 claims
- 3064US11463171B2Bidirectional optical communication and sensing WDM architecture using same fiber transmission bandNEC LAB AMERICA INC·Filed 2020·Granted Oct 4, 2022·0 cites·4 claims
- 3163US12405136B2Vibration sensing over passive optical networks (PONs) using forwarding optical phase retrieval and time-domain multiplexed (TDM) switchingNEC LAB AMERICA INC·Filed 2022·Granted Sep 2, 2025·0 cites·8 claims
- 3263US11692867B2Polarization diversity combining method in coherent DAS maintaining phase continuityNEC LAB AMERICA INC·Filed 2021·Granted Jul 4, 2023·0 cites·2 claims
- 3363US8873971B2Nonlinear compensation using an enhanced backpropagation method with subbandingIP EZRA·Filed 2011·Granted Oct 28, 2014·2 cites·4 claims
- 3462US12135234B2Frequency-drift compensation in chirped-pulse-based distributed acoustic sensingNEC LAB AMERICA INC·Filed 2022·Granted Nov 5, 2024·0 cites·6 claims
- 3562US12055803B2Distributed acoustic sensing using dynamic range suppressionNEC LAB AMERICA INC·Filed 2021·Granted Aug 6, 2024·0 cites·2 claims
- 3660US11159200B2High speed frequency hopping DAS interrogation using AOM-gated re-circulating loop and frequency-shifted receiver LONEC LAB AMERICA INC·Filed 2019·Granted Oct 26, 2021·0 cites·8 claims
- 3760US2025286623A1DYNAMIC SEGMENTED DFOS OPERATION ON BIDIRECTIONAL WDM MULTI-SPAN FIBER LINKS USING FIBER NETWORK ROADMsNEC LAB AMERICA INC·Filed 2025·Application pending·0 cites
- 3858US10763964B2Bidirectional optical communication and sensing WDM architecture using same fiber transmission bandNEC LAB AMERICA INC·Filed 2019·Granted Sep 1, 2020·0 cites·1 claims
- 3957US12442681B2Distributed fiber optic sensing enabled self-coherent detection for data centersNEC LAB AMERICA INC·Filed 2022·Granted Oct 14, 2025·0 cites·9 claims
- 4057US2021356317A1Complex and phase domain vibration strength estimation for coherent distributed acoustic sensingNEC LAB AMERICA INC·Filed 2021·Application pending·0 cites
- 4156US11960042B2Laser noise reduction for laser interferometryNEC LAB AMERICA INC·Filed 2021·Granted Apr 16, 2024·0 cites·12 claims
- 4256US11193801B2Amplifier dynamics compensation for brillouin optical time-domain reflectometryNEC LAB AMERICA INC·Filed 2020·Granted Dec 7, 2021·0 cites·4 claims
- 4353US11133865B2Optical network performance evaluation using a hybrid neural networkNEC LAB AMERICA INC·Filed 2020·Granted Sep 28, 2021·0 cites·10 claims
- 4449US10404398B2Repeaterless passive optical add/drop multiplexed fiber networkNEC LAB AMERICA INC·Filed 2018·Granted Sep 3, 2019·0 cites·9 claims
- 4549US2014313469A1RECONFIGURABLE 1xN FEW-MODE FIBER OPTICAL SWITCH BASED ON A SPATIAL LIGHT MODULATORNEC LAB AMERICA INC·Filed 2014·Application pending·0 cites
- 4646US2023283385A1Data transmission-tolerant distributed acoustic sensing using chirped-pulses with time-domain roll offNEC LAB AMERICA INC·Filed 2023·Application pending·0 cites
- 4746US2010296819A1Optical Receivers and Communication SystemsKAHN JOSEPH M·Filed 2009·Application pending·0 cites
- 4842US2014063592A16x28-Gbaud Few-Mode Fiber Recirculating Loop Transmission with Gain-Equalized Inline Few-Mode Fiber AmplifierNEC LAB AMERICA INC·Filed 2013·Application pending·0 cites
- 4940US9813157B2Mitigation of multi-path interference from quasi-single-mode fiber using hybrid span configuration and digital signal processingNEC LAB AMERICA INC·Filed 2016·Granted Nov 7, 2017·0 cites·2 claims
- 5040US9450676B2Variable line-rate optical transmitter by modulation format hopping using electrical-optical-electrical EOE generated QAM SignalHUANG YUE-KAI·Filed 2012·Granted Sep 20, 2016·0 cites·6 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Ezra Ip files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →