Signal Processing Device Project | NTT Device Technology Center | NTT R&D Website
next generation of optical networks by developing digital coherent devices, optical switching and
https://www.rd.ntt/e/nttdtc/organization/photonic.html
Ultracompact Silicon Photonics Coherent Optical Subassembly for Ultrahigh-capacity Optical Communication | NTT R&D Website
Coherent Optical Subassembly for Ultrahigh-capacity Optical CommunicationNTT Device Innovation Center
https://www.rd.ntt/e/research/JN202008_6165.html
A Leap Forward in Ultra-high-speed Optical Modulation and Demodulation Technology for Achieving High-capacity, Long-distance Transmission | NTT R&D Website
the core device for digital coherent optical transmission. --What is a DSP-LSI? A DSP-LSI is an LSI
https://www.rd.ntt/e/research/JN202605_39218.html
Photonics-electronics convergence hardware technology, aimed at revolutionizing the network|NTT R&D Website
. “Digital coherent optical transmission technology” is becoming popular as a technology to realize optical
https://www.rd.ntt/e/communication_device/0002.html
Videos about NTT Device Innovation Center | NTT Device Innovation Center | NTT R&D Website
-EPON Control LSI technology4’22” 100G-bit/s Digital coherent optical Receiver6’12” 2011 A Compact
https://www.rd.ntt/e/nttdtc/movie/
rdf17-1e.pdf
distance transmission at 400 Gbit/s is achieved by using innovative technologies such as a digital coherent
https://www.rd.ntt/e/nttdtc/theme/pdf/2017/rdf/rdf17-1e.pdf
Yoshihiro Ogiso | NTT R&D Website
) Keywords High-speed optical modulation technology Compound semiconductor Digital coherent device Related
https://www.rd.ntt/e/organization/researcher/special/s_062.html
Future Development of Digital Coherent Optical Transmission Technology | NTT R&D Website
Future Development of Digital Coherent Optical Transmission Technology | NTT R&D Website NTT R&D
https://www.rd.ntt/e/research/JN202205_18123.html
Research and Development of Scalable Optical Transport Technologies | NTT R&D Website
expected to exceed 1 Pbit/s by the 2030s. Digital coherent optical communication technology using digital
https://www.rd.ntt/e/research/JN202205_18134.html
Transport Innovation Laboratory | NTT Network Innovation Laboratories | NTT R&D Website
wavelength by newly developed digital coherent signal processing circuit and optical device - For larger
https://www.rd.ntt/e/mirai/organization/product_4/
Optical Device Technology for Next-generation Computing Using Light | NTT R&D Website
Hashimoto NTT Device Technology Laboratories In this article Introduction Digital technologies used in all
https://www.rd.ntt/e/research/JN202206_18551.html
Ultra-wideband Analog ICs Using InP Semiconductors to Overcome the Limits of Optical Communications | NTT R&D Website
digital coherent technology* was commercially introduced between 2012 and 2013. Along with advances in the
https://www.rd.ntt/e/research/JN202602_38170.html
Takeo Sasai | NTT R&D Website
/Distinguished Researchers Distinguished ResearcherTakeo Sasai NTT Network Innovation Laboratories NTT Device
https://www.rd.ntt/e/organization/researcher/special/s_106.html
What is high-capacity optical transmission technology? Infrastructure to support rapidly increasing communication traffic|NTT R&D Website
”, “quadrature amplitude modulation (QAM modulation)”, and “digital coherent technology”. The following section
https://www.rd.ntt/e/communication_device/0001.html
Photonic Implementation of Reservoir Computing | NTT R&D Website
Device Technology Laboratories Photonic Implementation of Reservoir Computing photonic computing machine
https://www.rd.ntt/e/research/JN202206_18595.html
History/Achievement | NTT Science and Core Technology Laboratory Group | NTT R&D Website
2019 Higher-order Multilevel Digital Coherent Optical Signal Generation Technologies for Over 1-Tbit-s
https://www.rd.ntt/e/sclab/history/
Bandwidth-doubler Technology Eliminates Bandwidth Bottlenecks | NTT R&D Website
. Also, experiments are underway for digital coherent transmission systems for medium- to long-range
https://www.rd.ntt/e/research/JN202206_18608.html
Ultra-high-capacity Optical Communication Technology | NTT R&D Website
Access Network Service Systems Laboratories†1/ NTT Network Innovation Laboratories†2/ NTT Device
https://www.rd.ntt/e/research/JN20200312_h.html
Contents
Nuclear Spins in a Nanoscale Device Ultrahigh-Q Photonic Crystal Nanocavity Realized with Locally
https://www.rd.ntt/e/brl/result/activities/file/report05/2005_E.html
All-Photonics Network and Photonics-electronics Convergence Technologies as a Vision of the Future | NTT R&D Website
Technology Laboratory Group†1/ Vice President, Head of NTT Device Innovation Center†2/ Vice President, Head
https://www.rd.ntt/e/research/JN202008_5963.html
Coherent Optical-amplifier-repeater Transmission Will Enable Optical Transmission over Longer Distances and with Larger Capacities | NTT R&D Website
optical-amplifier repeater digital coherent technology WDM bandwidth expansion The spread of the Internet
https://www.rd.ntt/e/research/JN202512_37464.html
Photonic Transport Network Systems Project | NTT R&D Website
high-density wavelength-multiplexing technology and digital-coherent technology—makes it possible to
https://www.rd.ntt/e/ntc/theme/transport.html
Nanophotonic Technologies toward Opto-electronic Integrated Accelerators | NTT R&D Website
expectations are being boosted by progress in miniature and energy-saving optical device and circuit technology
https://www.rd.ntt/e/research/JN202008_5995.html
Latest Research Contents | NTT Basic Research Laboratories | NTT R&D Website
Using a Graphene Electron Interferometer 09/30/2021 100,000-spin coherent Ising machine 05/14/2021
https://www.rd.ntt/e/brl/latesttopics/
Optical Circuit Technologies for Next-generation Computing Using Light | NTT R&D Website
/2022 Optical Circuit Technologies for Next-generation Computing Using LightNTT Device Technology
https://www.rd.ntt/e/research/JN202206_18579.html
Optical Technologies for Optical Quantum Computing with Continuous Variables | NTT R&D Website
amplitudes, similar to that used in digital-coherent transmission technology for optical fiber communications
https://www.rd.ntt/e/research/JN202304_21560.html
Open R&D <2025 Annual Report>|NTT R&D Website
Correction Technology using Power Generation 1 Tbit/s Class Large-Capacity Digital Coherent Optical Device 1
https://www.rd.ntt/e/about/openrd/
Turning an Innovative Idea into Common Sense and Making It Useful to Society | NTT R&D Website
repeater systems, wavelength-division multiplexing (WDM) systems, and digital-coherent systems. As a result
https://www.rd.ntt/e/research/JN202304_21583.html
Achieving IOWN/6G and Creating New Value with World-leading Technologies | NTT R&D Website
) that enables large-capacity transmission of 1.6-Tbit/s class by using digital coherent optical
https://www.rd.ntt/e/research/JN202405_26173.html
Sharing Moments of "This Is It!" with Colleagues to Research and Develop Optical Communication Technology for Revolutionizing Society | NTT R&D Website
amplified transmission systems, wavelength-division-multiplexing (WDM) systems, and digital coherent systems
https://www.rd.ntt/e/research/JN202007_5686.html
NTT R&D FORUM — Road to IOWN 2021|Exhibits| NTT R&D Website
social value. Read More Computing This theme introduces IOWN computing technologies, digital twin
https://www.rd.ntt/e/forum/2021/exhibits.html
Toshikazu Hashimoto | NTT R&D Website
Device Technology Laboratories Senior Distinguished ResearcherMore Senior Distinguished Researchers Basic
https://www.rd.ntt/e/organization/researcher/superior/s_028.html
NTT Innovative Photonic Network Center | NTT R&D Website
integration technology to achieve high-speed digital coherent optical transmission of the multi-terabit/s
https://www.rd.ntt/e/ipc/
Takahiro Suzuki | NTT R&D Website
, Takahiro Suzuki, Ken-Ichi Suzuki, Akihiro Otaka, "Demonstration of Real-Time Burst-Mode Digital Coherent
https://www.rd.ntt/e/organization/researcher/special/s_072.html
Yuta Ueda | NTT R&D Website
,Semiconductor optical physics,Digital coherent optical communication,Optical remote sensing Related Contents
https://www.rd.ntt/e/organization/researcher/special/s_065.html
Quantum Optical State Control Research Group | NTT Basic Research Laboratories | NTT R&D Website
(OPOs) haves been studied to realize a coherent Ising machine for combinatorial optimization problems. A
https://www.rd.ntt/e/brl/group_introduction/group_009.html
量子光制御研究グループ|NTT物性科学基礎研究所|NTT R&D Website
coherent Ising machine" Sci. Adv. 11 (7), eads7223 (2025). Publications in 2024 K. Inoue, and T. Honjo
https://www.rd.ntt/brl/group_introduction/group_009.html
Demonstration of a high performance optical logic gate for ultralow-latency data processing|NTT Basic Research Laboratories | NTT R&D Website
time in the world. According to the presented device, we can perform ultralow latency and wavelength
https://www.rd.ntt/e/brl/latesttopics/2020/03/latest_topics_202003061859.html
Basic Technologies toward the All-Photonics Network | NTT R&D Website
for digital coherent communications. Fig. 2. Progress in photonics technology enabling traffic growth
https://www.rd.ntt/e/research/JN20200126_h.html
Report on the NTT R&D Forum — Road to IOWN 2022|NTT R&D Website
infrastructure becoming available to you. IOWN "Datacenter × APN" Fig. 3. Digital coherent signal processing
https://www.rd.ntt/e/forum/2022/keynote_2.html
鈴木 貴大 | NTT R&D Website
, Akihiro Otaka, "Demonstration of Real-Time Burst-Mode Digital Coherent Reception With Wide Dynamic Range
https://www.rd.ntt/organization/researcher/special/s_072.html
NTT_TRFSW_2022_E.pdf
of optical transceiv- ers. Digital coherent technology is a transmission method combining digital
https://www.rd.ntt/e/download/NTT_TRFSW_2022_E.pdf
I Wish to Contribute to the World through Research for the Rest of My Life | NTT R&D Website
Research Laboratories I Wish to Contribute to the World through Research for the Rest of My Life coherent
https://www.rd.ntt/e/research/JN202204_17846.html
Early Deployment and Popularization of IOWN Technologies as Targeted by IOWN Product Design Center | NTT R&D Website
of Digital Coherent Optical Transmission Technology,” NTT Technical Review, Vol. 20, No. 7, pp. 17–23
https://www.rd.ntt/e/research/JN202302_20966.html
論文|NTT物性科学基礎研究所|NTT R&D Website
entanglement via coherent-state transmission" Phys. Rev. A 105 (6), 062432 (2022). V. M. Bastidas "Topological
https://www.rd.ntt/brl/result/publications/paper_2022.html
Publications | NTT Basic Research Laboratories | NTT R&D Website
). K. Azuma, N. Imoto, and M. Koashi "Optimal supplier of single-error-type entanglement via coherent
https://www.rd.ntt/e/brl/result/publications/paper_2022.html
Innovative Network for 2030 (Beyond 2020) | NTT R&D Website
service requirements (Function 3). A terminal function applying photonics-electronics convergence device
https://www.rd.ntt/e/research/JN20200122_h.html
NTT Basic Research Laboratories Theoretical quantum physics research group / Publications
's first realization of an optomechanical device with extremely low optical energy loss (2020.10.17
https://www.rd.ntt/brl/group_introduction/ryouron-g/publication.html
NTT物性科学基礎研究所 理論量子物理研究グループ / 出版物
realization of an optomechanical device with extremely low optical energy loss (2020.10.17) SIMULATING COMPLEX
https://www.rd.ntt/brl/group_introduction/ryouron-g/publication_j.html
Annual_report_2019_E.pdf
International Symposium on Coherent Network Comput ing (CNC) was held f rom March 18 to 20 , 2019, co-sponsored
https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2019_E.pdf
Theoretical Quantum Physics Research Group | NTT Basic Research Laboratories | NTT R&D Website
. 57 (10), 102001 (2024). L. Ruks, X. Xu, R. Ohta, W. J. Munro, and V. M. Bastidas Coherent response of
https://www.rd.ntt/e/brl/group_introduction/group_013.html
論文|NTT物性科学基礎研究所|NTT R&D Website
"Optimization by Neural Networks in the Coherent Ising Machine and its Application to Wireless Communication
https://www.rd.ntt/brl/result/publications/paper_2021.html
Publications | NTT Basic Research Laboratories | NTT R&D Website
"Optimization by Neural Networks in the Coherent Ising Machine and its Application to Wireless Communication
https://www.rd.ntt/e/brl/result/publications/paper_2021.html
Optical Transmission Technology for Practical Implementation of the All-Photonics Network | NTT R&D Website
based on dense wavelength division multiplexing and digital coherent technology, its transmission
https://www.rd.ntt/e/research/JN202211_20087.html
NTTBrl_honbun_E_260302.indd
Vds (V) Vgs = +5V: -1V step Device structure of AlN-based polarization-doped FET with downward-graded
https://www.rd.ntt/brl/result/activities/file/annual_report/NTTBrl_E_260310_print.pdf
Study on Open All-Photonic Network in IOWN Global Forum | NTT R&D Website
. Evolution of optical transport technologies Since the commercialization of digital coherent transmission
https://www.rd.ntt/e/research/JN202203_17536.html
理論量子物理研究グループ|NTT物性科学基礎研究所|NTT R&D Website
(2024). L. Ruks, X. Xu, R. Ohta, W. J. Munro, and V. M. Bastidas Coherent response of inhomogeneously
https://www.rd.ntt/brl/group_introduction/group_013.html
NTT R&D FORUM 2025 Event Report | NTT R&D Website
with optical communications. Photonic quantum technology and digital coherent technology share the
https://www.rd.ntt/e/forum/2025/
R&D Activities of Core Wireless Technologies toward 6G Radio Access | NTT R&D Website
Paradigm with Wide-area Coverage Future Development of Digital Coherent Optical Transmission Technology
https://www.rd.ntt/e/research/JN202205_18140.html
What's IOWN? - Change the World | NTT R&D Website
name of her son. The son brings her a cube-shaped device. To help her recall her memories, her digital
https://www.rd.ntt/e/research/JN20200109_h.html
Updates | NTT R&D Website
Technologies 08/05/2022 Future Development of Digital Coherent Optical Transmission Technology 08/05/2022
https://www.rd.ntt/e/update_information/
NTTBrl__E_h1
Electronic Devices Information processing with coherent electron motion 07 Structure of our device and the
https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2017_E.pdf
論文|NTT物性科学基礎研究所|NTT R&D Website
.54-mu m Telecom Transitions of Epitaxial (ErxSc1-x)(2)O-3 Thin Layers for Coherent Population
https://www.rd.ntt/brl/result/publications/paper_2018.html
Publications | NTT Basic Research Laboratories | NTT R&D Website
Transitions of Epitaxial (ErxSc1-x)(2)O-3 Thin Layers for Coherent Population Manipulation: Weak Excitation
https://www.rd.ntt/e/brl/result/publications/paper_2018.html
Report on the NTT R&D Forum — Road to IOWN 2022|NTT R&D Website
. One is the development of a digital coherent signal processing circuit that can achieve an optical
https://www.rd.ntt/e/forum/2022/
NTTBrl_honbun_E_220301-2.indd
ide a wearable device. The algorithm also suppresses false detection of cardiac abnormalit ies caused
https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2021_E.pdf
NTTBrl_honbun_E_190306.indd
(>70%) is a key issue for device applications. We achieved a high hole concentration on the order of
https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2018_E.pdf
NTTBrl_honbun_E_230228_final.indd
optimized device structure and advanced measurement techniques. As we move forward, we aim to enhance the
https://www.rd.ntt/brl/brl/result/activities/file/annual_report/Annual_report_2022_E.pdf
NTTBrl_honbun_E_230228_final.indd
optimized device structure and advanced measurement techniques. As we move forward, we aim to enhance the
https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2022_E.pdf
Publications | NTT Basic Research Laboratories | NTT R&D Website
G. S. Buller "Experimental demonstration of quantum digital signatures over 43 dB channel loss using
https://www.rd.ntt/e/brl/result/publications/paper_2017.html
論文|NTT物性科学基礎研究所|NTT R&D Website
G. S. Buller Experimental demonstration of quantum digital signatures over 43 dB channel loss using
https://www.rd.ntt/brl/result/publications/paper_2017.html
R&D History | NTT R&D Website
service. R&D of ultralow-power 400 G per channel digital coherent device (DSP). Launched Train the Brain
https://www.rd.ntt/e/about/chronicle/
report_2005E.pdf
.................................................................. 72 Cover photograph: Coherent Control of Nuclear Spins in a Semiconductor Nano-scale Device. Nuclear
https://www.rd.ntt/e/brl/result/activities/file/report05/report_2005E.pdf
Annual_report_2023_E.pdf
to lead to the construction of a "biodigital twin" that maps us on a digital space using the
https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2023_E.pdf
Annual_report_2023_E.pdf
to lead to the construction of a "biodigital twin" that maps us on a digital space using the
https://www.rd.ntt/brl/brl/result/activities/file/annual_report/Annual_report_2023_E.pdf
Report on the NTT R&D Forum 2018 (Autumn) | NTT R&D Website
Research and Development Center (Musashino City, Tokyo) under the concept, "Transforming Your Digital
https://www.rd.ntt/e/forum/forum2018_autumn.html
Symposium Program
Superconducting Phase Qubit V. Petrashov University of London, UK 15:20-16:00 coffee break Coherent Vortices in
https://www.rd.ntt/brl/event/ms s2004/sympo_pgm.html
NTT物性科学基礎研究所の研究活動
figure are taken from [M. Brinkmann et al., Phys. Rev. Lett. 74 (1995) 4927]. (Page 22) -Ⅰ- Coherent
https://www.rd.ntt/e/brl/result/activities/file/report13/Report_13_e.pdf
Low-latency and Energy Efficient Technologies for New Optical Access Networks | NTT R&D Website
. Igarashi, J. Kani, and T. Yoshida, “New Photonic Gateway to Handle Digital-coherent and IM-DD User
https://www.rd.ntt/e/research/JN202307_22288.html
Aiming for High-speed, High-capacity Wireless Communication Systems through Practical Application of Terabit-class Wireless Transmission Technology | NTT R&D Website
) promoting the introduction of NTT optical device technologies (coherent digitalsignal-processor technology
https://www.rd.ntt/e/research/JN202507_34705.html
Quantum Optical Physics Research Group | NTT Basic Research Laboratories | NTT R&D Website
science and technology. We are conducting experimental research in this field and exploring new device
https://www.rd.ntt/e/brl/group_introduction/group_010.html
山本 喜久|NTT R&D Website
čković, G. S. Solomon, and Y. Yamamoto, "Indistinguishable photons from a single-photon device", Nature 419
https://www.rd.ntt/organization/authority/008.html
Keynote Speech 2|Report on the NTT R&D Forum 2021|NTT R&D Website
topology, photonic disaggregated computing, Cradio®, 4D digital platform™, infinite clustering, NTT Green
https://www.rd.ntt/e/forum/2021/keynote_2.html
学術論文出版一覧
, "Experimental Transmission of Quantum Digital Signatures over 90 km of Installed Optical Fiber Using a
https://www.rd.ntt/brl/result/activities/file/report16/data10J.html
Publication List
. Takeoka, E. Andersson, G. S. Buller, and M. Sasaki, "Experimental Transmission of Quantum Digital
https://www.rd.ntt/e/brl/result/activities/file/report16/data09E.html
論文|NTT物性科学基礎研究所|NTT R&D Website
"Applying Coherent Ising Machines for Enhancing Communication Efficiency in Large-Scale UAV-Aided Networks
https://www.rd.ntt/brl/result/publications/paper_2024.html
Publications | NTT Basic Research Laboratories | NTT R&D Website
. Takesue, K. Inaba, K. Aihara, and M. Hasegawa "Applying Coherent Ising Machines for Enhancing
https://www.rd.ntt/e/brl/result/publications/paper_2024.html
Thin-Film Materials Research Group | NTT Basic Research Laboratories | NTT R&D Website
growth and device applications of new semiconductor materials such as cubic boron nitride (c-BN) and
https://www.rd.ntt/e/brl/group_introduction/group_001.html
Annual_report_2020_E.pdf
and diamond. For electron device applications of c-BN, electrical conductivity control by impurity
https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2020_E.pdf
薄膜材料研究グループ|NTT物性科学基礎研究所|NTT R&D Website
Performance of AlN MESFETs With Epitaxially Grown n-Type AlN Channel Layers IEEE Electron Device Lett. 43 (3
https://www.rd.ntt/brl/group_introduction/group_001.html
Microsoft Word - 01_akasaka-E.doc
present device achieves high-speed transfer and long retention. We demonstrated that the device could
https://www.rd.ntt/e/brl/result/activities/file/report04/BRLReports_E.pdf
Yasushi Takatori | NTT R&D Website
, Mitsuki Nakamura, Wataru Yamada, Yasushi Takatori, "Joint Delay and Azimuth Estimation of Coherent Waves
https://www.rd.ntt/e/organization/researcher/superior/s_029.html
鷹取 泰司 | NTT R&D Website
, Wataru Yamada, Yasushi Takatori, "Joint Delay and Azimuth Estimation of Coherent Waves for Millimeter
https://www.rd.ntt/organization/researcher/superior/s_029.html
Papers -KN's HP-
simulations indicated that such a device with inhomogeneous tunnel and gate capacitances can exhibit single
https://www.rd.ntt/brl/people/knishi50/paper_all.html
Report_15_E.pdf
Optical Science Laboratory ◆ Coherent Raman Beat Analysis of the Hyperfine Sublevel Coherence Properties
https://www.rd.ntt/e/brl/result/activities/file/report15/Report_15_E.pdf
Program_H170124.pdf
corporation, 2Institute for Laser Science, UEC, 3CREST, Japanese Science and Technology Agency, 4Coherent
https://www.rd.ntt/brl/event/nnci2005/Program_H170124.pdf
論文|NTT物性科学基礎研究所|NTT R&D Website
. Fujisawa, S. Tarucha, and L. P. Kouwenhoven "Out-of-equilibrium Kondo effect in a mesoscopic device" Phys
https://www.rd.ntt/brl/result/publications/paper_2002.html
Publications | NTT Basic Research Laboratories | NTT R&D Website
. Kouwenhoven "Out-of-equilibrium Kondo effect in a mesoscopic device" Phys. Rev. Lett. 89 (15), 156801 (2002
https://www.rd.ntt/e/brl/result/publications/paper_2002.html
Report_14_E.pdf
Manager Dr. Hideki Yamamoto Quantum and Nano Device Research Senior Distinguished Researcher Dr. Hiroshi
https://www.rd.ntt/e/brl/result/activities/file/report14/Report_14_E.pdf
Papers>>Sensor -KN's HP-
mode. Our measurements reveal that even an incoherent input into the higher mode results in coherent
https://www.rd.ntt/brl/people/knishi50/paper_2.html