H04B2210/075 - CPC Classification Index

#1

20260113114

2026-04-23

PILOT-ASSISTED FIBER LENGTH ESTIMATION

#2

20250080224

2025-03-06

Management and control system of wavelength-multiplexed subranging electro-optic modulator (SEOM)s for high dynamic range applications

#3

20240322912

2024-09-26

OPTICAL SIGNAL SENDING METHOD, PILOT RECEIVER, AND TRANSMITTER

#4

20200381895

2020-12-03

Optical module, transmission device, and operating point control method

#5

20190288776

2019-09-19

Methods and systems for multi-level beacon tone modulation of an optical data signal

#6

20190190612

2019-06-20

Methods and systems for multi-level beacon tone modulation of an optical data signal

#7

20190097721

2019-03-28

Method and apparatus for monitoring polarization dependent loss, receiver and communication system

#8

20180302153

2018-10-18

Optical channel monitoring using expanded-spectrum pilot tone

#9

20180183518

2018-06-28

Generating a pilot tone for an optical telecommunications system

#10

20180069626

2018-03-08

Detection apparatus and method for noise intensity and coherent optical receiver

#11

20170373748

2017-12-28

Method and apparatus for providing a pilot tone

#12

20170294967

2017-10-12

Asynchronous bias control for an optical modulator using a multiple tone detection technique with phase correction

#13

20170244479

2017-08-24

Optical channel monitoring using expanded-spectrum pilot tone

#14

20170170907

2017-06-15

OPTICAL TRANSMISSION DEVICE AND OPTICAL TRANSMISSION METHOD

#15

20170104529

2017-04-13

Monitoring apparatus for optical signal to noise ratio, signal transmission apparatus and receiver

#16

20170033871

2017-02-02

Optical transmitter and method of controlling optical modulator

#17

20170026132

2017-01-26

Method for controlling modulation depth of pilot signal, transmitter, and pilot locking apparatus

#18

20170005726

2017-01-05

Methods and systems for superchannel subcarrier monitoring using amplitude modulated tones

#19

20170005725

2017-01-05

Methods and systems for superchannel subcarrier monitoring using frequency modulation tones

#20

20160380716

2016-12-29

Method and system for removing a pilot tone from an optical signal

#21

20160315724

2016-10-27

Signal processing apparatus, signal transmitting apparatus and receiver

#22

20160315699

2016-10-27

Probe generator, optical transmission apparatus and probe generating method

#23

20160301496

2016-10-13

Method and device for creating a control channel in an optical transmission signal and method and device for extracting the information included therein

#24

20160142171

2016-05-19

Signal detection circuit and optical transmission equipment

#25

20150236797

2015-08-20

Method and apparatus for selecting wavelength by wavelength tunable optical receiver

#26

20150078764

2015-03-19

Frequency synchronization for an OFDM optical receiver

#27

20150010299

2015-01-08

Method, apparatus, node device and network system for detecting optical signal-to-noise ratio

#28

20140219662

2014-08-07

Signal detection circuit and optical transmission equipment

#29

20140010543

2014-01-09

Tunable coherent optical receiver and method

#30

20130286847

2013-10-31

Optical communication link employing coherent detection and out of band channel identification

#31

20130259174

2013-10-03

Method and system for pilot-based time domain phase noise mitigation for coherent receiver

#32

20120318965

2012-12-20

OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD

#33

20120189307

2012-07-26

Modulator with marking of polarization

#34

20120128351

2012-05-24

Communication system, measuring apparatus, transmitting apparatus, and measurement method

#35

20120063768

2012-03-15

Method and system for cancellation of chromatic dispersion combined laser phase noise

#36

20120051739

2012-03-01

Identifying a Characteristic of a Mesh Network

#37

20110076020

2011-03-31

Power control of optical signals having different polarizations

#38

20100283996

2010-11-11

Method and system for distributed measurement and compensation of chromatic dispersion in an optical network

#39

20090324219

2009-12-31

Apparatus and method for improving the tolerance of tone-based optical channel monitoring to stimulated Raman scattering

#40

20090196603

2009-08-06

Method for lightpath monitoring in an optical routing network

#41

20090175616

2009-07-09

Automatic power restoring method and optical communication system

#42

20090154922

2009-06-18

Pilot tones for optical signal wavelength identification and power measurement

#43

20080317461

2008-12-25

Automatic power restoring method and optical communication system

#44

20070280700

2007-12-06

Noise tone avoidance in optical networks

#45

20070104483

2007-05-10

Methods and apparatus for optical network management using pilot tones

#46

20060239697

2006-10-26

Methods and apparatus for sensing multiple wavelengths simultaneously in a single wavelength sensing device

#47

20060110158

2006-05-25

Methods and apparatus for optical network management using pilot tones

#48

20050286890

2005-12-29

Method and apparatus for maintaining a pre-determined ratio of a pilot tone power and a mean optical output power of an optical signal

#49

20050089326

2005-04-28

Cancellation of transmitted signal crosstalk in optical receivers of diplexer-based fiber optic transceivers

#50

20050031342

2005-02-10

Method of pilot-tone signal transmission on an optical fiber and a system thereof

#51

18680843

2024-11-05

Enhanced subranging electro-optic modulator (SEOM) for high dynamic range applications

#52

18585565

2025-01-21

Wavelength-multiplexed subranging electro-optic modulator (SEOM) for high dynamic range applications

#53

18238801

2024-02-27

Wavelength-multiplexed subranging electro-optic modulator (SEOM) for high dynamic range applications

#54

10261099

2015-03-03

Link discovery, verification, and failure isolation in an optical communication system