ClassID:

223894

H04B10/5053 - CPC Classification

Classification description:

Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication; Transmitters; Structural aspects; Laser transmitters using external modulation using a parallel, i.e. shunt, combination of modulators

Recent Application in this class:
#1
20260121750
2026-04-30

INTEGRATED TRANSCEIVER SYSTEMS AND METHODS

#2
20260058750
2026-02-26

METHODS OF INJECTION LOCKING FOR MULTIPLE OPTICAL SOURCE GENERATION

#3
20250211336
2025-06-26

APPARATUS AND METHOD FOR DETERMINING SIGNAL CORRELATION

#4
20250096901
2025-03-20

OPTICAL MULTIPLE-INPUT-MULTIPLE-OUTPUT (MIMO) DEMULTIPLEXERS

#5
20250096795
2025-03-20

DATA DRIVERS

#6
20250080224
2025-03-06

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

#7
20240430012
2024-12-26

METHOD AND SYSTEM FOR ENCODING MULTI-LEVEL PULSE AMPLITUDE MODULATED SIGNALS USING INTEGRATED OPTOELECTRONIC DEVICES

#8
20240333392
2024-10-03

OPTICAL TRANSCEIVERS WITH MULTI-LASER MODULES

#9
20240333391
2024-10-03

OPTICAL MODULATOR AND OPTICAL MODULATION METHOD

#10
20240283542
2024-08-22

Transmitting device and method for transmitting a broadband optical transmission signal

#11
20240129042
2024-04-18

COMMUNICATION DEVICE INCLUDING NESTED MODULATOR AND BIAS CONTROL METHOD FOR NESTED MODULATOR

#12
20240107205
2024-03-28

SWITCH AND COMMUNICATION SYSTEM

#13
20240045238
2024-02-08

OPTICAL TRANSMITTER AND METHOD OF TRANSMITTING AN OPTICAL SIGNAL

#14
20240039636
2024-02-01

Two-dimensional optical modulation and detection technologies for optical communications

#15
20240022333
2024-01-18

Photonics-aided vector terahertz signal communication system

#16
20240022331
2024-01-18

Phase shifter architecture for large-element-count optical phased arrays

#17
20230412274
2023-12-21

Multi-parallel and serial optical analog to digital conversion

#18
20230396339
2023-12-07

CONFIGURABLE INTENSITY-MODULATION DIRECT DETECTION (IMDD) OPTICAL TRANSCEIVERS

#19
20230353253
2023-11-02

Optical module switch device

#20
20230273497
2023-08-31

Semiconductor IQ Modulator

#21
20230216588
2023-07-06

Dynamically-Switchable Optical Cable

#22
20230138252
2023-05-04

OPTICAL TRANSMITTER AND OPTICAL MODULATION METHOD

#23
20230097053
2023-03-30

Optical multiple-input-multiple-output (MIMO) demultiplexers

#24
20230067645
2023-03-02

Highly-integrated multi-channel optical module having lens mounting structure for minimizing optical alignment error and lens assembly process thereof

#25
20230007886
2023-01-12

MULTI-CHANNEL PARALLEL OPTICAL COMMUNICATION MODULE AND OPTICAL TRANSCEIVER HAVING THE SAME

#26
20220385372
2022-12-01

Phase shifter architecture for large-element-count optical phased arrays

#27
20220247495
2022-08-04

Method and system for encoding multi-level pulse amplitude modulated signals using integrated optoelectronic devices

#28
20220209869
2022-06-30

Optical transceivers with multi-laser modules

#29
20220173815
2022-06-02

OPTICAL COMMUNICATION SYSTEM AND OPTICAL COMMUNICATION METHOD

#30
20220158752
2022-05-19

Optical modulator

#31
20220066278
2022-03-03

Electro-optical modulator and method of modulating an optical beam to carry an RF signal

#32
20220021460
2022-01-20

Spectrally beam-combined, fiber-based multi-wavelength receiver/transceiver

#33
20210194594
2021-06-24

Optical transmitter

#34
20210167860
2021-06-03

Optical transceiver

#35
20210119707
2021-04-22

Data transmission on phase components of an optical carrier by direct modulation of reflectors of a laser

#36
20200403705
2020-12-24

Optical transceivers with multi-laser modules

#37
20200275173
2020-08-27

Reconfigurable optical modulator

#38
20200186255
2020-06-11

Optical transmitter, optical receiver, and optical transmission method

#39
20200106527
2020-04-02

Optical transmission apparatus, optical transmission method, control circuit of the optical transmission apparatus, and storage medium of the optical transmission apparatus

#40
20200106526
2020-04-02

Extinction ratio improvements in silicon photonics

#41
20200099454
2020-03-26

Optical modulator and method of use

#42
20200081277
2020-03-12

Bias control of optical modulators

#43
20190342008
2019-11-07

Signal transmitting method, signal receiving method, and related device and system

#44
20190339547
2019-11-07

BIAS CONTROL OF OPTICAL MODULATORS

#45
20190312647
2019-10-10

Methods and apparatus for low-loss reconfigurable optical quadrature amplitude modulation (QAM) signal generation

#46
20190310497
2019-10-10

Closed loop bias control for an IQ phase modulator

#47
20190296830
2019-09-26

Method and system for encoding multi-level pulse amplitude modulated signals using integrated optoelectronic devices

#48
20190243165
2019-08-08

Optical modulator with automatic bias correction

#49
20190227352
2019-07-25

CLOSED LOOP QUADRATURE BIAS CONTROL FOR AN IQ PHASE MODULATOR

#50
20190215145
2019-07-11

Signal processing device and signal processing method

#51
20190215075
2019-07-11

Method and system for silicon photonics wavelength division multiplexing transceivers

#52
20190199442
2019-06-27

Dual parallel Mach-Zehnder-modulator device with pre-distorted driving voltages

#53
20190181956
2019-06-13

Systems and methods for biasing optical modulating devices

#54
20190165862
2019-05-30

Optical modulation unit, and method for controlling optical modulation unit

#55
20190097728
2019-03-28

High capacity coherent optical transceiver for short reach applications

#56
20190028200
2019-01-24

System and method for the transmission of optical signals

#57
20190018262
2019-01-17

Optical apparatus

#58
20180331765
2018-11-15

Method and system for the monolithic integration of circuits for monitoring and control of RF signals

#59
20180287708
2018-10-04

Signal transmitting method, signal receiving method, and related device and system

#60
20180269978
2018-09-20

Systems and methods for biasing optical modulating devices

#61
20180267340
2018-09-20

Bias control of optical modulators

#62
20180262376
2018-09-13

Modulator, modulation system, and method for implementing higher order modulation

#63
20180217467
2018-08-02

Optical modulator

#64
20180191447
2018-07-05

Optical signal processing method and coherent receiver

#65
20180191442
2018-07-05

Method and system for silicon photonics wavelength division multiplexing transceivers

#66
20180183542
2018-06-28

OPTICAL TRANSMISSION DEVICE, OPTICAL RECEPTION DEVICE, OPTICAL TRANSMISSION SYSTEM, AND OPTICAL TRANSMISSION METHOD

#67
20180173023
2018-06-21

Bias control of optical modulators

#68
20180123698
2018-05-03

Method and apparatus for automatically controlling bias voltage of optical modulator

#69
20180123696
2018-05-03

Method of controlling semiconductor optical device that includes semiconductor optical amplifier

#70
20180062753
2018-03-01

Methods and apparatus for low-loss reconfigurable optical quadrature amplitude modulation (QAM) signal generation

#71
20180046057
2018-02-15

Waveguide modulators structures

#72
20170331581
2017-11-16

Digital Representations of Analog Signals and Control Words Using Different Multi-Level Modulation Formats

#73
20170331559
2017-11-16

Optical transmitter

#74
20170264389
2017-09-14

Spectral inversion detection for polarization-division multiplexed optical transmission

#75
20170257170
2017-09-07

Optical transmitter module

#76
20170254957
2017-09-07

Polarization dispersion adder and optical receiver

#77
20170201325
2017-07-13

Method and system for the monolithic integration of circuits for monitoring and control of RF signals

#78
20170201324
2017-07-13

Optical switching apparatus, optical cross-connect node, and optical signal switching method

#79
20170199399
2017-07-13

Optical modulator with automatic bias correction

#80
20170126325
2017-05-04

Method and system for encoding multi-level pulse amplitude modulated signals using integrated optoelectronic devices

#81
20170054511
2017-02-23

Dual parallel Mach-Zehnder-modulator device with pre-distorted driving voltages

#82
20170033871
2017-02-02

Optical transmitter and method of controlling optical modulator

#83
20170026131
2017-01-26

External cavity laser based wavelength division multiplexing superchannel transceivers

#84
20170019181
2017-01-19

Optical component

#85
20170005748
2017-01-05

Optical transceiving apparatus, optical transmitting method, and optical transmitting device

#86
20160308641
2016-10-20

Digital representations of analog signals and control words using different multi-level modulation formats

#87
20160301477
2016-10-13

External cavity laser based wavelength division multiplexing superchannel transceivers

#88
20160301191
2016-10-13

External cavity laser based wavelength division multiplexing superchannel transceivers

#89
20160266415
2016-09-15

Optical modulator with automatic bias correction

#90
20160261439
2016-09-08

Modulating system adapted to generate a multi-level quadrature amplitude modulation

#91
20160261352
2016-09-08

Polarization state aligner (PSA)

#92
20160218811
2016-07-28

Digital generation of multi-level phase shifting with a Mach-Zehnder modulator (MZM)

#93
20160204894
2016-07-14

Stokes-vector-based transmission and detection of optical polarization-division-multiplexed signals

#94
20160204878
2016-07-14

Optical power system for digital-to-analog link

#95
20160156416
2016-06-02

Optical transmitter and bias control method for optical modulator

#96
20160139485
2016-05-19

Multi-electrode photonic digital to analog converting vector modulator

#97
20160134391
2016-05-12

Method of optical data transmission using polarization division multiplexing and QPSK

#98
20160119078
2016-04-28

Multichannel data transport suitable for direct optical detection at the receiver

#99
20160119057
2016-04-28

Method and system for silicon photonics wavelength division multiplexing transceivers

#100
20160105244
2016-04-14

Optical transmitter, method for controlling optical modulator, and controller for optical modulator

#101
20160056896
2016-02-25

Optical communication device and method of controlling optical modulator

#102
20150358084
2015-12-10

Optical communication circuits

#103
20150341121
2015-11-26

Detection and alignment of XY skew

#104
20150293426
2015-10-15

Optical modulator

#105
20150280828
2015-10-01

Optical transceiver

#106
20150256257
2015-09-10

Secure data transmission using spatial multiplexing

#107
20150236790
2015-08-20

Mach-Zehnder modulator bias control for arbitrary waveform generation

#108
20150229433
2015-08-13

Polarization multiplexing optical transmitter and operation control method

#109
20150222365
2015-08-06

Optical transmitter and bias voltage control method

#110
20150207569
2015-07-23

Method and apparatus for stabilization of optical transmitter

#111
20150171971
2015-06-18

Optical transmitter and control method of optical transmitter

#112
20150147018
2015-05-28

Optical modulator

#113
20150139665
2015-05-21

Low bit rate signaling with optical IQ modulators

#114
20150139649
2015-05-21

Polarization multiplexing optical transceiver

#115
20150132013
2015-05-14

Advanced optical modulation generation by combining orthogonal polarized optical signals

#116
20150117869
2015-04-30

Optical multilevel transmitter and optical transponder

#117
20150117868
2015-04-30

PARALLEL OPTICAL TRANSMITTER

#118
20150093120
2015-04-02

Optical carrier-suppressed signal generator

#119
20150030330
2015-01-29

Optical transmitter, optical communication system, and optical communication method

#120
20140369638
2014-12-18

Advanced modulation format using two-state modulators

#121
20140363175
2014-12-11

Optical transmitter and method of controlling optical transmitter

#122
20140334829
2014-11-13

Optical transmitter and bias control method of optical modulator

#123
20140328601
2014-11-06

Optical modulator and method of encoding communications traffic in a multilevel modulation format

#124
20140314368
2014-10-23

Directly-modulated multi-polarization optical transmitters

#125
20140294402
2014-10-02

Optical transmission apparatus, optical transmission method and program for optical transmission

#126
20140294401
2014-10-02

Optical transmitter and method thereof

#127
20140254974
2014-09-11

Optical modulator

#128
20140241657
2014-08-28

Optical modulator with automatic bias correction

#129
20140233965
2014-08-21

System and method for monitoring and control of an optical modulator for an M-QAM transmitter

#130
20140233084
2014-08-21

Phase modulation apparatus

#131
20140226993
2014-08-14

Optical line terminal transmitting device for next generation optical access networks

#132
20140186028
2014-07-03

Method and system for encoding multi-level pulse amplitude modulated signals using integrated optoelectronic devices

#133
20140153934
2014-06-05

Optical modulator and optical transmitter

#134
20140153077
2014-06-05

Optical modulation device and bias voltage control method

#135
20140147112
2014-05-29

Transmission device, transmission method, and communication system

#136
20140140707
2014-05-22

Optical transmission device, method of optical transmission, and non-transitory computer-readable medium

#137
20140133869
2014-05-15

RZ optical modulator and RZ optical modulation method

#138
20140133868
2014-05-15

Intensity-based modulator

#139
20140133860
2014-05-15

Individual information in lower and upper optical sidebands

#140
20140126913
2014-05-08

Modulating apparatus

#141
20140105605
2014-04-17

Driver for multi-stage wave guide modulator and method

#142
20140093253
2014-04-03

Dual-drive modulator

#143
20140079394
2014-03-20

Optical communication of interleaved symbols associated with polarizations

#144
20140072313
2014-03-13

Optical transmission apparatus

#145
20140037286
2014-02-06

Method and system for the monolithic integration of circuits for monitoring and control of RF signals

#146
20140036937
2014-02-06

OTDM coherent transceiver

#147
20140023368
2014-01-23

Method and apparatus for stabilization of optical transmitter

#148
20140010538
2014-01-09

Optical polarization multilevel signal receiving apparatus, optical polarization multilevel signal transmitting apparatus, and optical polarization multilevel signal transmission apparatus

#149
20130330070
2013-12-12

Methods and apparatus for pre and post equalization in optical communications systems

#150
20130322809
2013-12-05

Optical modulator

#151
20130315524
2013-11-28

Optical frequency shifter and optical modulator using the same

#152
20130287398
2013-10-31

Multi-channel optical transceiver with offset quadrature amplitude modulation

#153
20130279913
2013-10-24

Method for controlling polarization multiplexed optical signal

#154
20130259479
2013-10-03

Optical transceiving apparatus, optical transmitting method, and optical transmitting device

#155
20130216220
2013-08-22

Optical transmitter implemented with two QPSK modulators made of semiconductor material and a method to control optical power output therefrom

#156
20130202315
2013-08-08

Optical transmitter and method for controlling bias for optical modulator

#157
20130202312
2013-08-08

Arrayed Optical Device Block for Photonic Integration

#158
20130195394
2013-08-01

Optical modulator

#159
20130177316
2013-07-11

OPTICAL COMMUNICATION SYSTEM, AND TRANSMITTER AND RECEIVER APPARATUS THEREFOR

#160
20130170841
2013-07-04

Method and apparatus for transmitting high-level QAM optical signals with binary drive signals

#161
20130136451
2013-05-30

Optical transfer system, optical transmission device, and optical reception device

#162
20130136449
2013-05-30

Communication through multiplexed one-dimensional optical signals

#163
20130108277
2013-05-02

Signal generating method and apparatus

#164
20130101295
2013-04-25

COMPACT TUNABLE OPTICAL OFDM SOURCE

#165
20130094797
2013-04-18

Optical Transmitter With Tunable Chirp

#166
20130077967
2013-03-28

Optical networks using multi-spatial mode media

#167
20130051723
2013-02-28

Optical frequency comb generating device and optical pulse generating device using same, and optical frequency comb generating method and optical pulse generating method using same

#168
20130028603
2013-01-31

Method and apparatus for performing temporal polarization interleaving in an optical transmitting system

#169
20130022306
2013-01-24

Gain control for an optical modulator

#170
20130022153
2013-01-24

Method and apparatus for controlling phase delay offset point of modulator

#171
20130011093
2013-01-10

Optical modulator

#172
20120321323
2012-12-20

Variable line-rate optical transmitter by modulation format hopping using electrical-optical-electrical EOE generated QAM Signal

#173
20120315043
2012-12-13

Transmission method, reception method, transmitter apparatus, and receiver device

#174
20120315036
2012-12-13

Method and system for encoding multi-level pulse amplitude modulated signals using integrated optoelectronic devices

#175
20120314277
2012-12-13

Optical modulator and optical modulation method

#176
20120308240
2012-12-06

Optical transmitter, control method for the same, and optical transmission system

#177
20120301153
2012-11-29

Optical output module, optical transceiver, and optical transmission system

#178
20120294622
2012-11-22

Alignment of a data signal to an alignment signal

#179
20120288284
2012-11-15

OPTICAL TRANSMITTER

#180
20120275791
2012-11-01

Method and apparatus for implementing PDM-BPSK modulation and QPSK modulation in compatible manner

#181
20120269512
2012-10-25

Transport of multiple asynchronous data streams using higher order modulation

#182
20120257899
2012-10-11

ORTHOGONAL BAND LAUNCH FOR REPEATERLESS SYSTEMS

#183
20120250792
2012-10-04

Alignment of in-phase and quadrature data in quadrature phase shift keying optical transmitters

#184
20120237156
2012-09-20

OPTICAL MODULATOR, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

#185
20120230626
2012-09-13

Optical modulator utilizing unary encoding and auxiliary modulator section for load balancing

#186
20120224856
2012-09-06

Optical modulation device and optical modulation method

#187
20120207483
2012-08-16

Apparatus and Method for Control the Driving Amplitude of Differential Quadrature Phase Shift Keying Transmitter

#188
20120177372
2012-07-12

Apparatus and method for generating interleaved return-to-zero (IRZ) polarization-division multiplexed (PDM) signals

#189
20120177365
2012-07-12

Secure data transmission using spatial multiplexing

#190
20120177065
2012-07-12

Secure Data Transmission Using Spatial Multiplexing

#191
20120163831
2012-06-28

Digital modulation method and device, especially an optical digital modulation method and device

#192
20120155865
2012-06-21

Optical signal transmitter, and bias voltage control method

#193
20120121264
2012-05-17

APPARATUS AND METHOD FOR TRANSMITTING LIGHT, AND APPARATUS AND METHOD FOR RECEIVING LIGHT

#194
20120087617
2012-04-12

Optical modulator and optical modulating method

#195
20120082465
2012-04-05

Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them

#196
20120082460
2012-04-05

Wavelength division multiplexed optical communication system architectures

#197
20120070151
2012-03-22

Optical modulators for generating de-emphasis formatted optical signals and methods of operating the same

#198
20120050844
2012-03-01

OPTICAL SIGNAL TRANSMISSION DEVICE, OPTICAL AMPLIFICATION DEVICE, OPTICAL ATTENUATION DEVICE AND OPTICAL SIGNAL TRANSMISSION METHOD

#199
20120039606
2012-02-16

Low power optical transceiver using orthogonal polarization detection technique

#200
20120033964
2012-02-09

METHOD AND APPARATUS FOR CONTROL OF DPSK AND DQPSK RECEIVERS AND TRANSMITTERS

#201
20120014470
2012-01-19

QUADRATURE MODULATOR WITH FEEDBACK CONTROL AND OPTICAL COMMUNICATIONS SYSTEM USING THE SAME

#202
20120008963
2012-01-12

Optical modulator, optical transmission device, and bias adjusting method

#203
20120002978
2012-01-05

Optical single-sideband transmitter

#204
20110293276
2011-12-01

Optical transmitter and method for controlling the same

#205
20110274441
2011-11-10

Methods and devices for modulating a signal

#206
20110255876
2011-10-20

Optical transmitter

#207
20110229148
2011-09-22

Optical modulation apparatus and optical modulation method

#208
20110176816
2011-07-21

Optical transmission apparatus

#209
20110176815
2011-07-21

Multi-channel optical transceiver with offset quadrature amplitude modulation

#210
20110170877
2011-07-14

Optical transmitter apparatus

#211
20110170876
2011-07-14

System and method for transmitting signals

#212
20110164844
2011-07-07

OPTICAL MODULATOR

#213
20110158654
2011-06-30

DIFFERENTIAL QUADRATURE PHASE SHIFT KEYING SYSTEM, METHOD, AND DEVICE

#214
20110158577
2011-06-30

Advanced modulation format using two-state modulators

#215
20110150481
2011-06-23

Electrical return-to-zero (ERZ) driver circuit

#216
20110150479
2011-06-23

Multi-level polarization multi-level phase modulator

#217
20110109954
2011-05-12

Method and apparatus for generating 8-QAM-modulated optical signal

#218
20110097085
2011-04-28

Optical transmitter, optical transmitter and receiver system, optical transmitting method and optical transmitting and receiving method

#219
20110081153
2011-04-07

Method and device for generating optical signals

#220
20110044702
2011-02-24

Polarization multiplexed optical transmitter and method for controlling polarization multiplexed optical signal

#221
20110044573
2011-02-24

Advanced modulation formats for silicon-based optical modulators

#222
20110026935
2011-02-03

Optical signal transmitter and method for controlling polarization multiplexed optical signal

#223
20110020012
2011-01-27

Optical signal receiving apparatus

#224
20110002696
2011-01-06

All-optical methods and systems

#225
20100329696
2010-12-30

16 quadrature amplitude modulation optical signal transmitter

#226
20100329690
2010-12-30

Optical communication system, optical communication method and optical communication apparatus

#227
20100272446
2010-10-28

Control system for a polar optical transmitter

#228
20100260504
2010-10-14

Optical transmission system

#229
20100247097
2010-09-30

Optical signal generator

#230
20100220376
2010-09-02

Optical modulation circuit and optical transmission system

#231
20100215374
2010-08-26

System, apparatus and method for communicating data via polarization multiplexing

#232
20100215365
2010-08-26

Optical modulator and optical communication system

#233
20100202785
2010-08-12

Quadrature amplitude modulation signal generating device

#234
20100196016
2010-08-05

Polarization multiplexing with different DPSK modulation schemes and system incorporating the same

#235
20100177373
2010-07-15

Tunable zero-chirp pulse generator using plasma dispersion phase modulator

#236
20100150577
2010-06-17

Communication System and Method With Signal Constellation

#237
20100142964
2010-06-10

OPTICAL TRANSMISSION APPARATUS WITH STABLE OPTICAL SIGNAL OUTPUT

#238
20100111466
2010-05-06

QAM optical modulators

#239
20100098435
2010-04-22

Optical transmitter apparatus

#240
20100080569
2010-04-01

Method and apparatus for generating DQPSK encoding optical signal

#241
20100080505
2010-04-01

Arrangement for the electro-optical control and fast modulation of THz transmitters and THz measuring systems

#242
20100067914
2010-03-18

Polarization multiplexed light transmitter and control method thereof

#243
20100060972
2010-03-11

Method and circuit for encoding multi-level pulse amplitude modulated signals using integrated optoelectronic devices

#244
20100034542
2010-02-11

Methods and apparatus for generation and transmission of optical signals

#245
20100034537
2010-02-11

Frequency offset polarization multiplexing modulation format and system incorporating the same

#246
20100021175
2010-01-28

Optical-time-division-multiplexing differential phase shift keying signal generating apparatus

#247
20100014874
2010-01-21

Phase control optical FSK modulator

#248
20100014872
2010-01-21

Method and apparatus for generating a dispersion compensation signal

#249
20100014862
2010-01-21

Mach-Zehnder Light Modulator, Mach-Zehnder Light Modulating Method, Optical Transmitter, Light Modulator, Optical Transmitting Apparatus, and Optical Receiving Apparatus

#250
20090274469
2009-11-05

Polarization multiplexed optical transmitting and receiving apparatus

#251
20090273821
2009-11-05

All-optical methods and systems

#252
20090269080
2009-10-29

Optical transmitting apparatus

#253
20090252501
2009-10-08

Device and method for transmitting optical data signals

#254
20090244685
2009-10-01

Optical modulator and controlling method and apparatus thereof

#255
20090232440
2009-09-17

DSB-SC modulation system capable of erasing carrier and secondary component

#256
20090226184
2009-09-10

Optical modulation device and optical modulation method

#257
20090220235
2009-09-03

Three-arm DQPSK modulator

#258
20090220185
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LIGHT MODULATING DEVICE

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Adjustable bit rate optical transmission using programmable signal modulation

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QAM optical modulators

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Skew compensation across polarized optical channels

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OPTICAL MSK DATA FORMAT

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DQPSK modulation apparatus and DQPSK modulation method

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Quaternary phase modulator

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Upgraded optical communication system with increased transmission capacity and method

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Multilevel optical phase modulator

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Optical transmitter and control method thereof

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Quadrature phase-shift keying modulator and phase shift amount controlling method for the same

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Optical device, optical modulation method, and optical transmitter

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Frequency shift keying demodulator

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Anti clipping circuit for laser transmitters

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Integrated optical waveform modulator

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Optical transmitter and control method therefor

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CONTROL METHOD FOR OPTICAL PHASE MODULATION

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Method and apparatus for pulse generation and adaptive pulse generation for optical communications

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Parallel channel optical communication using modulator array and shared laser

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OTDM-DPSK signal generator capable of detecting an optical carrier phase difference between optical pulses

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Optical transmission device

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Optical modulator

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Optical Subchannels From a Single Lightwave Source

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Optical transmitter and optical transmission system

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Optical Transmitter Using Nyquist Pulse Shaping

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Method and arrangement for the optical transmission of data signals via differential phase modulation in a polarization multiplex method

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Method for generating carrier residual signal and its device

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Method and Apparatus for Producing High Extinction Ratio Data Modulation Formats

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Distributed amplifier optical modulators

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Optical communications systems, devices, and methods

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Optical transmission apparatus

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Integrated optical waveform modulation

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DUAL-PARALLEL-MZ MODULATOR BIAS CONTROL

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Optical modulator

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Optical transmitter apparatus

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Method and apparatus for pulse generation and adaptive pulse generation for optical communications

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Quadrature modulator with feedback control and optical communications system using the same

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Fiber optical transmission system, transmitter and receiver for DQPSK modulated signals and method for stabilizing the same

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Apparatus for modulating one or both of spectral phase and amplitude of an optical signal

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All-optical methods and systems

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Optical transmitting apparatus and optical communication system

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Parallel precoder circuit

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Differential quadrature phase-shift modulator and method for setting driving voltage thereof