Inventor
CHANG SUN-HYOK
KR30 patents
⚠️ This page may combine multiple inventors who share the name “CHANG SUN-HYOK”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KOREA ELECTRONICS TELECOMM
11 patentsUS9264171B2Feb 16, 2016
Multi-mode fiber-based optical transmission/reception apparatus
KOREA ELECTRONICS TELECOMM10 citations84
US8009986B2Aug 30, 2011
Optical node for mesh-type WDM optical network
KOREA ELECTRONICS TELECOMM12 citations84
US7038841B2May 2, 2006
Fiber amplifier and control method thereof
KOREA ELECTRONICS TELECOMM15 citations83
US8036527B2Oct 11, 2011
Apparatus and method for protection switching of optical channel
KOREA ELECTRONICS TELECOMM3 citations63
US7751710B2Jul 6, 2010
Photonic cross-connector system, WDM system using the same photonic cross-connector, and optical communication network based on the same WDM system
KOREA ELECTRONICS TELECOMM2 citations62
US7385753B2Jun 10, 2008
Hybrid optical amplifier using gain-clamped semiconductor optical amplifier enabling raman amplification
KOREA ELECTRONICS TELECOMM2 citations62
US7154663B2Dec 26, 2006
Dispersion compensating fiber for S-band discrete Raman amplifier
KOREA ELECTRONICS TELECOMM6 citations62
US7230958B2Jun 12, 2007
Raman amplifier and raman pumping method
KOREA ELECTRONICS TELECOMM3 citations61
US9240667B2Jan 19, 2016
Optical pumping apparatus for few-mode fiber amplification
KOREA ELECTRONICS TELECOMM1 citations52
US9191121B2Nov 17, 2015
Optical transmitter and method thereof
KOREA ELECTRONICS TELECOMM1 citations52
US9274354B2Mar 1, 2016
Polarization control device and method
KOREA ELECTRONICS TELECOMM0 citations41
ELECTRONICS & TELECOMMUNICATIONS RES INST
8 patentsUS11079548B2Aug 3, 2021
Optical connection apparatus and optical connection method using the same
ELECTRONICS & TELECOMMUNICATIONS RES INST8 citations84
US10523333B2Dec 31, 2019
Optical signal transmission apparatus for generating multi-level optical signal and method performed by the same
ELECTRONICS & TELECOMMUNICATIONS RES INST2 citations72
US10523323B2Dec 31, 2019
Apparatus and method for equalization and compensation of chromatic dispersion in optical transmission
ELECTRONICS & TELECOMMUNICATIONS RES INST4 citations72
US12549261B2Feb 10, 2026
Alamouti decoder having feedforward phase compensation structure and method of operation thereof
ELECTRONICS & TELECOMMUNICATIONS RES INST0 citations61
US11408822B2Aug 9, 2022
Method of generating terahertz wave and apparatuses performing the same
ELECTRONICS & TELECOMMUNICATIONS RES INST0 citations61
US10904043B2Jan 26, 2021
Optical transmission apparatus and method for processing signal based on direct detection
ELECTRONICS & TELECOMMUNICATIONS RES INST0 citations61
US12407417B2Sep 2, 2025
Method and apparatus for optimizing performance of optical transceiver
ELECTRONICS & TELECOMMUNICATIONS RES INST0 citations51
US9787401B2Oct 10, 2017
Mode division multiplexed passive optical network (MDM-PON) apparatus, and transmission and reception method using the same
ELECTRONICS & TELECOMMUNICATIONS RES INST1 citations51
CHUNG HWAN-SEOK
6 patentsUS8681885B2Mar 25, 2014
OFDM receiver and method for compensating for I/Q imbalance
CHUNG HWAN-SEOK8 citations83
US8155521B2Apr 10, 2012
Multi-degree cross-connector system, operating method and optical communication network using the same
CHUNG HWAN-SEOK7 citations79
US8406625B2Mar 26, 2013
Apparatus and method for cross-connecting optical path in wavelength division multiplexing system
CHUNG HWAN-SEOK5 citations72
US8116623B2Feb 14, 2012
Multi-ring network operating method and system
CHUNG HWAN-SEOK4 citations62
US8565620B2Oct 22, 2013
Apparatus for receiving optical signal and method of controlling phase offset for differential quadrature phase shift keying
CHUNG HWAN-SEOK0 citations51
US8224190B2Jul 17, 2012
Channel assignment method and apparatus for wavelength-division-multiplexed transmission system
CHUNG HWAN-SEOK1 citations51