Inventor
HEISMANN FRED L
US19 patents
⚠️ This page may combine multiple inventors who share the name “HEISMANN FRED L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AT & T BELL LAB
7 patentsUS5212743AMay 18, 1993
Automatic polarization controller having broadband, reset-free operation
AT & T BELL LAB121 citations97
US4966431AOct 30, 1990
Integrated-optic endless polarization transformer
AT & T BELL LAB56 citations96
US5361270ANov 1, 1994
Apparatus and method employing polarization modulation to reduce effects of polarization hole burning and/or polarization dependent loss
AT & T BELL LAB21 citations92
US5317439AMay 31, 1994
Automatic on-line monitoring and optimization of optical network switching nodes
AT & T BELL LAB44 citations92
US5296956AMar 22, 1994
Performance monitoring and fault location for optical equipment, systems and networks
AT & T BELL LAB32 citations92
US5327511AJul 5, 1994
Apparatus and method employing fast polarization modulation to reduce effects of polarization hole burning and polarization dependent loss
AT & T BELL LAB40 citations90
US5359678AOct 25, 1994
Apparatus and method employing fast polarization modulation to reduce effects of polarization hole burning and/or polarization dependent loss
AT & T BELL LAB8 citations71
LUCENT TECHNOLOGIES INC
4 patentsUS6330375B1Dec 11, 2001
Distortion analyzer for compensation apparatus of first order polarization mode dispersion (PMD)
LUCENT TECHNOLOGIES INC28 citations92
US5611005AMar 11, 1997
High-speed polarization scrambler with adjustable chirp
LUCENT TECHNOLOGIES INC28 citations92
US5600738AFeb 4, 1997
Polarization dispersion compensation for optical devices
LUCENT TECHNOLOGIES INC26 citations91
US6411750B1Jun 25, 2002
Distortion analyzer
LUCENT TECHNOLOGIES INC9 citations73
HEISMANN FRED L
3 patentsUS8135275B2Mar 13, 2012
Measuring chromatic dispersion in an optical wavelength channel of an optical fiber link
HEISMANN FRED L16 citations81
US8131157B2Mar 6, 2012
Method and apparatus for generating signals with increased dispersion tolerance using a directly modulated laser transmitter
HEISMANN FRED L3 citations61
US8294896B2Oct 23, 2012
Determining in-band optical signal-to-noise ratios in optical signals with time-varying polarization states using polarization extinction
HEISMANN FRED L0 citations39
AT & T CORP
2 patentsVIAVI SOLUTIONS INC
2 patentsUS10218436B2Feb 26, 2019
Determining in-band optical signal-to-noise ratio in polarization-multiplexed optical signals using signal correlations
VIAVI SOLUTIONS INC4 citations73
US10651931B2May 12, 2020
Determining in-band optical signal-to-noise ratio in polarization-multiplexed optical signals using signal correlations
VIAVI SOLUTIONS INC0 citations52