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Class Information
Number: 398/185
Name: Optical communications > Transmitter > Having particular modulation > Hybrid modulation
Description: Subject matter includes a) plurality of modulators or b) more than one type of modulation techniques.

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8687979 Method, device and system for generating and receiving a phase polarization modulated signal Apr. 1, 2014
8676056 Subcarrier multiplex system Mar. 18, 2014
8660425 Optical transmitting device and optical receiving device Feb. 25, 2014
8649687 Methods and devices for modulating a signal Feb. 11, 2014
8620158 Communications device with discriminator and wavelength division multiplexing for generating intermediate frequency signal and related methods Dec. 31, 2013
8582980 Optical device and optical modulation method Nov. 12, 2013
8582979 Method and arrangement for transmitting an optical OFDM-signal Nov. 12, 2013
8571417 System and method for mitigating four-wave-mixing effects Oct. 29, 2013
8554085 Method and apparatus for waveform generation Oct. 8, 2013
8531761 High peak power optical amplifier Sep. 10, 2013
8532498 Secure orthogonal frequency multiplexed optical communications Sep. 10, 2013
8526817 Communications device with discriminator for generating intermediate frequency signal and related methods Sep. 3, 2013
8526828 Optical transmitter and optical transmitter unit Sep. 3, 2013
8521036 Code grouping for optical networks Aug. 27, 2013
8509626 System and method for reducing mutual leakage between distributed feedback laser and electro-absorption modulator in integrated electro-absorption modulated laser Aug. 13, 2013
8498542 Multi-channel optical transceiver with offset quadrature amplitude modulation Jul. 30, 2013
8494376 Method and apparatus for testing transmitters in optical fiber networks Jul. 23, 2013
8488979 Multi-level polarization multi-level phase modulator Jul. 16, 2013
8472810 Optical signal transmitter and method for controlling polarization multiplexed optical signal Jun. 25, 2013
8463138 Multi-value optical transmitter Jun. 11, 2013
8463131 Method and apparatus for conveying timing information Jun. 11, 2013
8428471 Optical access system for dual service network Apr. 23, 2013
8396369 Method and system for propagating upstream cable modem signals and RF return video control signals over the same optical network Mar. 12, 2013
8391724 Optical modulator, optical transmission device, and bias adjusting method Mar. 5, 2013
8364038 Polarization multiplexed optical transmitter and method for controlling polarization multiplexed optical signal Jan. 29, 2013
8331798 Optical m-ary modulator Dec. 11, 2012
8326158 Device and method for transmitting optical data signals Dec. 4, 2012
8320775 Method and device for bias control of a laser MZ modulator Nov. 27, 2012
8311415 Frequency up-conversion system and method for the same Nov. 13, 2012
8306433 Optical modulation signal generating device and optical modulation signal generating method Nov. 6, 2012
8290375 Modulation based optical spectrum analyzer Oct. 16, 2012
8270847 Polarization multiplexing with different DPSK modulation schemes and system incorporating the same Sep. 18, 2012
8270848 Device and method for receiving DQPSK signal and method for obtaining DQPSK signal Sep. 18, 2012
8238758 Three-arm DQPSK modulator Aug. 7, 2012
8213798 Optical transmission apparatus, wavelength division multiplexing optical communication system and optical transmission method Jul. 3, 2012
8213806 Optical communications Jul. 3, 2012
8208818 Optical free space transmission system using visible light and infrared light Jun. 26, 2012
8190032 Optical signal processing apparatus May. 29, 2012
8184988 Optical modulating device with frequency multiplying technique for electrical signals May. 22, 2012
8155533 Optical transmitting apparatus and optical communication system Apr. 10, 2012
8155534 Optical modulator for higher-order modulation Apr. 10, 2012
8116638 Radio frequency (RF) signal receiver using optical processing and associated methods Feb. 14, 2012
8103171 Method, system and device for data transfer in an optical network Jan. 24, 2012
8098997 Optical modulator and optical transmitter Jan. 17, 2012
8098994 Optical interconnection system for transmitting and receiving a three-level signal and method of operating the same Jan. 17, 2012
8055137 Phase coded non-return-to-zero optical transmitter Nov. 8, 2011
8041232 Optical transmitter and control method thereof Oct. 18, 2011
8027593 Slow chirp compensation for enhanced signal bandwidth and transmission performances in directly modulated lasers Sep. 27, 2011
8023829 Demodulation of phase modulated fibre-optic sensor system signals Sep. 20, 2011
8019222 Digital encoding of labels for optical packet networks Sep. 13, 2011

1 2 3 4 5 6

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