Inventor · disambiguated record
Sun Hyok Chang
Also filed as: CHANG SUN H · CHANG SUN HYOK
29 granted patents·25 pending applications·143 citations·filing 1998–2024
96Inventor score
Files withKOREA ELECTRONICS TELECOMM17ELECTRONICS & TELECOMMUNICATIONS RES INST13CHUNG HWAN SEOK11CHANG SUN-HYOK6ELECT & TELECOMM RESEARCH INST3
Top patents by PatentIndex Score
54 records- 0192US11079548B2Optical connection apparatus and optical connection method using the sameELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2019·Granted Aug 3, 2021·8 cites·13 claims
- 0291US9264171B2Multi-mode fiber-based optical transmission/reception apparatusKOREA ELECTRONICS TELECOMM·Filed 2014·Granted Feb 16, 2016·10 cites·18 claims
- 0387US8009986B2Optical node for mesh-type WDM optical networkKOREA ELECTRONICS TELECOMM·Filed 2007·Granted Aug 30, 2011·12 cites·5 claims
- 0485US8681885B2OFDM receiver and method for compensating for I/Q imbalanceCHUNG HWAN-SEOK·Filed 2010·Granted Mar 25, 2014·8 cites·3 claims
- 0583US10523323B2Apparatus and method for equalization and compensation of chromatic dispersion in optical transmissionELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2018·Granted Dec 31, 2019·4 cites·15 claims
- 0682US8260154B2Digital equalization apparatus and method for coherent optical receiverCHANG SUN-HYOK·Filed 2009·Granted Sep 4, 2012·13 cites·5 claims
- 0781US8670679B2Coherent optical receiving apparatus and optical signal processing methodCHUNG HWAN SEOK·Filed 2011·Granted Mar 11, 2014·6 cites·14 claims
- 0876US8155521B2Multi-degree cross-connector system, operating method and optical communication network using the sameCHUNG HWAN-SEOK·Filed 2006·Granted Apr 10, 2012·7 cites·11 claims
- 0975US10523333B2Optical signal transmission apparatus for generating multi-level optical signal and method performed by the sameELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2018·Granted Dec 31, 2019·2 cites·19 claims
- 1075US8995843B2Multicarrier based optical signal transmitting apparatus and optical signal receiving apparatusCHUNG HWAN SEOK·Filed 2012·Granted Mar 31, 2015·3 cites·7 claims
- 1175US8406625B2Apparatus and method for cross-connecting optical path in wavelength division multiplexing systemCHUNG HWAN-SEOK·Filed 2009·Granted Mar 26, 2013·5 cites·9 claims
- 1273US7038841B2Fiber amplifier and control method thereofKOREA ELECTRONICS TELECOMM·Filed 2003·Granted May 2, 2006·15 cites·11 claims
- 1372US7154663B2Dispersion compensating fiber for S-band discrete Raman amplifierKOREA ELECTRONICS TELECOMM·Filed 2005·Granted Dec 26, 2006·6 cites·5 claims
- 1471US8116623B2Multi-ring network operating method and systemCHUNG HWAN-SEOK·Filed 2008·Granted Feb 14, 2012·4 cites·27 claims
- 1567US8036527B2Apparatus and method for protection switching of optical channelKOREA ELECTRONICS TELECOMM·Filed 2008·Granted Oct 11, 2011·3 cites·4 claims
- 1665US7751710B2Photonic cross-connector system, WDM system using the same photonic cross-connector, and optical communication network based on the same WDM systemKOREA ELECTRONICS TELECOMM·Filed 2007·Granted Jul 6, 2010·2 cites·20 claims
- 1763US9240667B2Optical pumping apparatus for few-mode fiber amplificationKOREA ELECTRONICS TELECOMM·Filed 2014·Granted Jan 19, 2016·1 cites·17 claims
- 1862US9787401B2Mode division multiplexed passive optical network (MDM-PON) apparatus, and transmission and reception method using the sameELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2016·Granted Oct 10, 2017·1 cites·9 claims
- 1962US2024322928A1Apparatus and method for two-way delay error compensation in communication systemELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2024·Application pending·0 cites
- 2061US11408822B2Method of generating terahertz wave and apparatuses performing the sameELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2020·Granted Aug 9, 2022·0 cites·17 claims
- 2161US9191121B2Optical transmitter and method thereofKOREA ELECTRONICS TELECOMM·Filed 2013·Granted Nov 17, 2015·1 cites·15 claims
- 2259US2025070882A1Method for coherent optical transmission and reception and apparatus thereofELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2024·Application pending·0 cites
- 2358US12407417B2Method and apparatus for optimizing performance of optical transceiverELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2023·Granted Sep 2, 2025·0 cites·16 claims
- 2458US8224190B2Channel assignment method and apparatus for wavelength-division-multiplexed transmission systemCHUNG HWAN-SEOK·Filed 2009·Granted Jul 17, 2012·1 cites·13 claims
- 2555US5969816ADirection switched mode-locked laser gyroscopeKOREA ADVANCED INST SCI & TECH·Filed 1998·Granted Oct 19, 1999·25 cites·18 claims
- 2653US7230958B2Raman amplifier and raman pumping methodKOREA ELECTRONICS TELECOMM·Filed 2004·Granted Jun 12, 2007·3 cites·4 claims
- 2752US10904043B2Optical transmission apparatus and method for processing signal based on direct detectionELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2020·Granted Jan 26, 2021·0 cites·20 claims
- 2850US7385753B2Hybrid optical amplifier using gain-clamped semiconductor optical amplifier enabling raman amplificationKOREA ELECTRONICS TELECOMM·Filed 2004·Granted Jun 10, 2008·2 cites·8 claims
- 2948US9274354B2Polarization control device and methodKOREA ELECTRONICS TELECOMM·Filed 2013·Granted Mar 1, 2016·0 cites·18 claims
- 3046US6992816B2Apparatus and method for gain-spectrum-tilt compensation in long-wavelength band dispersion-compensating hybrid fiber amplifierELECT & TELECOMM RESEARCH INST·Filed 2003·Granted Jan 31, 2006·1 cites·17 claims
- 3146US2010150576A1Optical transmitting apparatus for return-to-zero differential phase-shift-keying (rz-dpsk) or return-to-zero differential quadrature phase shift keying (rz-dqpsk)CHUNG HWAN-SEOK·Filed 2009·Application pending·0 cites
- 3245US2009060499A1Apparatus and method for monitoring quality of optical signalELECT & TELECOMM RESEARCH INST·Filed 2008·Application pending·0 cites
- 3343US2009080892A1Network apparatus and method for guaranteeing role of optical supervisory channelELECT & TELECOMM RESEARCH INST·Filed 2008·Application pending·0 cites
- 3443US2010142971A1Apparatus for synchronizing digital signals of coherent optical receiverCHANG SUN-HYOK·Filed 2009·Application pending·0 cites
- 3543US2010142964A1Optical transmission apparatus with stable optical signal outputCHANG SUN-HYOK·Filed 2009·Application pending·0 cites
- 3643US2014199075A1Apparatus and method for controlling multicarrier light source generatorKOREA ELECTRONICS TELECOMM·Filed 2014·Application pending·0 cites
- 3743US2008131130A1Optical network node deviceKOREA ELECTRONICS TELECOMM·Filed 2007·Application pending·0 cites
- 3843US2021273406A1Optical transceiver and method of setting wavelength of optical transceiverELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2020·Application pending·0 cites
- 3942US8565620B2Apparatus for receiving optical signal and method of controlling phase offset for differential quadrature phase shift keyingCHUNG HWAN-SEOK·Filed 2010·Granted Oct 22, 2013·0 cites·16 claims
- 4042US2010329684A1Channel express/add optical module and channel express/add method in optical add/drop multiplexer node using the sameKOREA ELECTRONICS TELECOMM·Filed 2007·Application pending·0 cites
- 4142US2022368352A1Apparatus and method for parallel reed-solomon encodingELECTRONICS AND TELECOMMINICATIONS RES INSTITUTE·Filed 2022·Application pending·0 cites
- 4241US2021152251A1Optical-based terahertz wireless signal transmitter and wireless signal receiverELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2020·Application pending·0 cites
- 4341US2007058241A1Optical amplification apparatus having function of flattening channel output spectrumKOREA ELECTRONICS TELECOMM·Filed 2006·Application pending·0 cites
- 4440US2013051804A1Ofdm optical transmitter and transmission method, and ofdm optical receiver and reception methodCHUNG HWAN SEOK·Filed 2012·Application pending·0 cites
- 4539US2019165867A1Optical receiver and control method of the optical receiverELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2018·Application pending·0 cites
- 4639US2013163072A1Multi-core optical fiber, wavelength division multiplexing coupler, and multi-core optical fiber amplifierCHANG SUN HYOK·Filed 2012·Application pending·0 cites
- 4739US2005078354A1Optical fiber amplifierFiled 2004·Application pending·0 cites
- 4838US2015372755A1Optical transmitting and receiving apparatus and method thereof based on multicarrier differential phase shift keyingKOREA ELECTRONICS TELECOMM·Filed 2015·Application pending·0 cites
- 4938US2011026924A1Ofdm optical transmitter and optical transmission methodKOREA ELECTRONICS TELECOMM·Filed 2010·Application pending·0 cites
- 5037US2016282560A1Optical demultiplexing apparatus and method for multi-carrier distributionELECTRONICS & TELECOMMUNICATIONS RES INST·Filed 2016·Application pending·0 cites
Showing the top 50 of 54 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →