Inventor · disambiguated record
Fred L. Heismann
Also filed as: HEISMANN FRED L · HEISMANN FRED LUDWIG
24 granted patents·941 citations·filing 1989–2019
97Inventor score
Top patents by PatentIndex Score
24 records- 0196US5930414AMethod and apparatus for automatic compensation of first-order polarization mode dispersion (PMD)LUCENT TECHNOLOGIES INC·Filed 1997·Granted Jul 27, 1999·232 cites·41 claims
- 0292US5212743AAutomatic polarization controller having broadband, reset-free operationAT & T BELL LAB·Filed 1992·Granted May 18, 1993·121 cites·32 claims
- 0387US9825698B2Determining in-band optical signal-to-noise ratio in polarization-multiplexed optical signals using signal correlationsJDS UNIPHASE CORP·Filed 2014·Granted Nov 21, 2017·6 cites·21 claims
- 0487US8135275B2Measuring chromatic dispersion in an optical wavelength channel of an optical fiber linkHEISMANN FRED L·Filed 2009·Granted Mar 13, 2012·16 cites·29 claims
- 0586US10218436B2Determining in-band optical signal-to-noise ratio in polarization-multiplexed optical signals using signal correlationsVIAVI SOLUTIONS INC·Filed 2017·Granted Feb 26, 2019·4 cites·8 claims
- 0685US4966431AIntegrated-optic endless polarization transformerAT & T BELL LAB·Filed 1989·Granted Oct 30, 1990·56 cites·20 claims
- 0783US5745274AMaintenance of optical networksLUCENT TECHNOLOGIES INC·Filed 1995·Granted Apr 28, 1998·57 cites·21 claims
- 0882US5970201APower regulation in optical networksLUCENT TECHNOLOGIES INC·Filed 1997·Granted Oct 19, 1999·63 cites·14 claims
- 0982US5892606AMaintenance of optical networksLUCENT TECHNOLOGIES INC·Filed 1997·Granted Apr 6, 1999·55 cites·18 claims
- 1077US5388170AElectrooptic device structure and method for reducing thermal effects in optical waveguide modulatorsAT & T CORP·Filed 1993·Granted Feb 7, 1995·44 cites·15 claims
- 1174US5327511AApparatus and method employing fast polarization modulation to reduce effects of polarization hole burning and polarization dependent lossAT & T BELL LAB·Filed 1993·Granted Jul 5, 1994·40 cites·29 claims
- 1271US5317439AAutomatic on-line monitoring and optimization of optical network switching nodesAT & T BELL LAB·Filed 1992·Granted May 31, 1994·44 cites·30 claims
- 1369US6411750B1Distortion analyzerLUCENT TECHNOLOGIES INC·Filed 2001·Granted Jun 25, 2002·9 cites·17 claims
- 1467US8131157B2Method and apparatus for generating signals with increased dispersion tolerance using a directly modulated laser transmitterHEISMANN FRED L·Filed 2008·Granted Mar 6, 2012·3 cites·21 claims
- 1566US5801863AMaintenance of optical networksLUCENT TECHNOLOGIES INC·Filed 1997·Granted Sep 1, 1998·26 cites·9 claims
- 1664US6330375B1Distortion analyzer for compensation apparatus of first order polarization mode dispersion (PMD)LUCENT TECHNOLOGIES INC·Filed 1999·Granted Dec 11, 2001·28 cites·18 claims
- 1763US5600738APolarization dispersion compensation for optical devicesLUCENT TECHNOLOGIES INC·Filed 1994·Granted Feb 4, 1997·26 cites·25 claims
- 1863US5296956APerformance monitoring and fault location for optical equipment, systems and networksAT & T BELL LAB·Filed 1992·Granted Mar 22, 1994·32 cites·36 claims
- 1961US5611005AHigh-speed polarization scrambler with adjustable chirpLUCENT TECHNOLOGIES INC·Filed 1996·Granted Mar 11, 1997·28 cites·18 claims
- 2059US10651931B2Determining in-band optical signal-to-noise ratio in polarization-multiplexed optical signals using signal correlationsVIAVI SOLUTIONS INC·Filed 2019·Granted May 12, 2020·0 cites·13 claims
- 2159US5495543APolarization-independent optical wavelength selective couplerAT & T CORP·Filed 1995·Granted Feb 27, 1996·22 cites·6 claims
- 2253US5361270AApparatus and method employing polarization modulation to reduce effects of polarization hole burning and/or polarization dependent lossAT & T BELL LAB·Filed 1993·Granted Nov 1, 1994·21 cites·34 claims
- 2346US8294896B2Determining in-band optical signal-to-noise ratios in optical signals with time-varying polarization states using polarization extinctionHEISMANN FRED L·Filed 2009·Granted Oct 23, 2012·0 cites·16 claims
- 2439US5359678AApparatus and method employing fast polarization modulation to reduce effects of polarization hole burning and/or polarization dependent lossAT & T BELL LAB·Filed 1993·Granted Oct 25, 1994·8 cites·24 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →