Result for "Optical transmission line",175

R&D of Innovative Optical Transmission Line Technologies｜NTT R&D Website

R&D of Innovative Optical Transmission Line Technologies｜NTT R&D Website NTT R&D Website Research

https://www.rd.ntt/e/research/JN202102_10373.html

Transmission Technology for Space-division Multiplexing Supporting Next-generation High-speed, Large-capacity Communications beyond Existing Limits | NTT R&D Website

Access Network Service Systems Laboratories In this article Optical fiber transmission line technology

https://www.rd.ntt/e/research/JN202307_22296.html

Spatial-mode Optical Measurement Technology to Support Diverse Global Services in the Future | NTT R&D Website

modes optical-fiber transmission line Communication traffic continues to increase each year and to

https://www.rd.ntt/e/research/JN202301_20661.html

Standardization Trends in Technologies Related to Fixed-line Networks | NTT R&D Website

Networks fixed-line network optical fiber optical connector Confronted by the development of various

https://www.rd.ntt/e/research/JN202311_23702.html

Successful Fabrication of 2D Photonic Crystals

optical-communications wavelength region [1]. We have also proposed a width-varied line-defect structure

https://www.rd.ntt/e/brl/result/activities/file/report00/E/report10_e.html

Successful Fabrication of 2D Photonic Crystals

optical-communications wavelength region [1]. We have also proposed a width-varied line-defect structure

https://www.rd.ntt/e/brl/result/activities/file/report00/E/k04_report_e.html

R&D of Innovative Optical Fiber Facility Technologies | NTT R&D Website

controlling the external node installed at the path switching point of the optical transmission line from the

https://www.rd.ntt/e/research/JN202408_28844.html

Takashi Matsui | NTT R&D Website

. 4178-4183. Keywords Optical fiber, Optical transmission line, space-division multiplexing Related

https://www.rd.ntt/e/organization/researcher/superior/s_042.html

Atsushi Nakamura | NTT R&D Website

technologies，Optical fiber transmission line characterization，Space division multiplexing fibers Related

https://www.rd.ntt/e/organization/researcher/special/s_073.html

E03_leaf_e.pdf

network enabled by wavelength conversion, and 2) long-haul multi-band transmission enabled by optical tilt

https://www.rd.ntt/forum/2023/doc/E03_leaf_e.pdf

N02_leaf_e.pdf

Transmission, which accommodates video signals directly into optical signals, enables transmission of high

https://www.rd.ntt/forum/2023/doc/N02_leaf_e.pdf

Publications | NTT Basic Research Laboratories | NTT R&D Website

, H. Olesen, X. Pan, and S. Saito "Transmission-Line Description Of Optical Feedback And Injection

https://www.rd.ntt/e/brl/result/publications/paper_1987.html

論文｜NTT物性科学基礎研究所｜NTT R&D Website

(1987). B. Tromborg, H. Olesen, X. Pan, and S. Saito "Transmission-Line Description Of Optical Feedback

https://www.rd.ntt/brl/result/publications/paper_1987.html

A Glimpse of the Information Communication Networks of the Future: Research on Optical Path Design for Large-Scale Computing Infrastructure｜NTT R&D Website

managed by NTT have been like roads. We establish a fixed optical transmission path, and customers' data

https://www.rd.ntt/e/research/RDNTT20210601.html

Optical Transmission Technology for Practical Implementation of the All-Photonics Network | NTT R&D Website

Optical Transmission Technology for Practical Implementation of the All-Photonics Network | NTT R

https://www.rd.ntt/e/research/JN202211_20087.html

Sharing Moments of "This Is It!" with Colleagues to Research and Develop Optical Communication Technology for Revolutionizing Society | NTT R&D Website

Optical Communication Technology for Revolutionizing Society Front-line Researchers, NTT Technical Review

https://www.rd.ntt/e/research/JN202007_5686.html

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

Hitless Redundant Switching Technology Able to Be Added on Networks | NTT R&D Website

short switching time such as switching lines at the time of trouble on a legacy dedicated line. In

https://www.rd.ntt/e/research/AS0085.html

R&D History | NTT R&D Website

Successful field test of a short-distance optical fiber transmission system. Developed optical fiber base

https://www.rd.ntt/e/about/chronicle/

Takui Uematsu | NTT R&D Website

transmission line, Optical network Related Contents

https://www.rd.ntt/e/organization/researcher/special/s_094.html

Optical fiber access technologies | NTT Access Network Service Systems Laboratories | NTT R&D Website

transmission capacity using SDM optical fiber design, the merging of system-power-saving/SDM-optical

https://www.rd.ntt/e/as/theme/02.html

Senior Distinguished Researcher Kazuhide Nakajima | NTT Access Network Service Systems Laboratories | NTT R&D Website

now has been progressing in line with developments in optical transmission systems and requirements

https://www.rd.ntt/e/as/team_researchers/researcher/01.html

Successful Fabrication of 2D Photonic Crystals

expected to lead to the development of future ultra-small-sized optical integrated cirsuits. Using SOI

https://www.rd.ntt/e/brl/result/activities/file/report00/E/k04_e.html

Optical Full-mesh Network Technologies Supporting the All-Photonics Network | NTT R&D Website

) Technologies for petabit-class ultra-large-capacity optical transmission system With the aim of deploying a

https://www.rd.ntt/e/research/JN20200318_h.html

Contributing to the Advancement of the IOWN APN through Research on New Optical Access Networks that Speed Up the Evolution of Information and Communication Services | NTT R&D Website

functions, and drastically improving transmission performance of optical access networks. Regarding the

https://www.rd.ntt/e/research/JN202510_36701.html

Photonics-electronics Convergence Technologies for Disaggregated Computing｜NTT R&D Website

(LSI). STEP 2 involves placing optical transmission devices, such as semiconductor lasers and

https://www.rd.ntt/e/research/JN202105_13599.html

Slow Light Propagation in Large-scale Photonic Crystal Coupled Resonator Waveguides

. Transmission spectra of long PC-CROWs (N: number of resonators). Fig. 2. Time-resolved data of optical pulses

https://www.rd.ntt/e/brl/result/activities/file/report07/report31.html

Photonic Gateway and Related Optical Access Technologies to Achieve the All-Photonics Network｜NTT R&D Website

important for optical access systems to support the separation of the basic transmission/transfer functions

https://www.rd.ntt/e/research/JN202102_10379.html

マラソン × 超低遅延通信技術｜NTT R&D Website

acquisition function is added to a white-box switch with an optical transponder for long-distance transmission

https://www.rd.ntt/e/research/JN202110_15557.html

Future Development of Digital Coherent Optical Transmission Technology | NTT R&D Website

transmission line consists of pure-silica-core fiber with an 80-km optical-amplification relay section and uses

https://www.rd.ntt/e/research/JN202205_18123.html

Achieving IOWN/6G and Creating New Value with World-leading Technologies | NTT R&D Website

(APN) optical transmission technology wireless transmission technology NTT Network Innovation

https://www.rd.ntt/e/research/JN202405_26173.html

Research and Development for Pioneering a New Communications Paradigm with Wide-area Coverage | NTT R&D Website

Pioneering a New Communications Paradigm with Wide-area Coverage optical transmission technology wireless

https://www.rd.ntt/e/research/JN202205_18109.html

High-output Optical Transmitter and High-sensitivity Optical Receiver for 400-Gbit/s 40-km Fiber-amplifier-less Transmission | NTT R&D Website

-amplifier-less Transmission | NTT R&D Website NTT R&D Website Research&Activity High-output Optical

https://www.rd.ntt/e/research/JN202206_18469.html

Demonstration of quantum cryptography without error rate monitoring｜NTT Basic Research Laboratories | NTT R&D Website

cryptography scheme that can assure security without monitoring the error rate of photon transmission. NTT-BRL

https://www.rd.ntt/e/brl/latesttopics/2015/09/latest_topics_201509150148.html

C+L-band Colorless, Directionless, Contentionless Reconfigurable Optical Add/Drop Multiplexing for High-capacity Network Flexibility | NTT R&D Website

transmission capacity and maximum end-to-end adoption of optical technology from the network to the terminal

https://www.rd.ntt/e/research/JN202206_18480.html

Turning an Innovative Idea into Common Sense and Making It Useful to Society | NTT R&D Website

-transmission-system technology. NTT has been a world leader in research and development (R&D) of optical

https://www.rd.ntt/e/research/JN202304_21583.html

NTTAS_EN_omote

high speed optical fiber communication services at lower cost. Analyze network device alarms and past

https://www.rd.ntt/e/download/NTTAS_2024Pamphlet_EN.pdf

Overview of Materials Science Research

optical devices and larger scales of integration. We proposed and fabricated line-defect two-dimensional

https://www.rd.ntt/e/brl/result/activities/file/report00/E/report06_e.html

Lambda-Scale Embedded Active-Region Photonic-Crystal (LEAP) Lasers

,2 1Nanophotonics Center, 2NTT Photonics Laboratories, 3Optical Science Laboratory    Photonic

https://www.rd.ntt/e/brl/result/activities/file/report12/report30e.html

A Leap Forward in Ultra-high-speed Optical Modulation and Demodulation Technology for Achieving High-capacity, Long-distance Transmission | NTT R&D Website

laser light. The optical signal that arrives via an optical-fiber transmission line is demodulated into

https://www.rd.ntt/e/research/JN202605_39218.html

Past and Future Prospects for Advanced Operation of Access Network Facilities | NTT R&D Website

line, it was difficult to predict optical demand, and additional construction could occur, so it was a

https://www.rd.ntt/e/research/JN202307_22286.html

Research and Development of 1.6-Tbit/s-class Ethernet Optical Transmission Technology Supporting Large-scale Datacenter Networks | NTT R&D Website

effect of waveform distortion generated in the optical fiber transmission line is very pronounced in

https://www.rd.ntt/e/research/JN202405_26179.html

APN-controller Technology for IOWN Service Provision and Expansion | NTT R&D Website

-resolution and high-frequency input/output optical-level-monitoring functions and transmission-line fiber

https://www.rd.ntt/e/research/JN202311_23716.html

Extremely Narrow Violet Photoluminescence Line from Ultrathin InN Single Quantum Well on Step-Free GaN Surface

Extremely Narrow Violet Photoluminescence Line from Ultrathin InN Single Quantum Well on Step-Free

https://www.rd.ntt/e/brl/result/activities/file/report12/report03e.html

Coupled Resonator Waveguides Formed by Ultrahigh-Q Si Photonic Crystal Nano-resonators

Tanabe, Hideaki Taniyama, and Masaya Notomi Optical Science Laboratory A periodic chain of optical

https://www.rd.ntt/e/brl/result/activities/file/report06/report32.html

Optical Device Technology for Next-generation Computing Using Light | NTT R&D Website

, frequency, and phase to transmit information. To provide an optical communication line, optical signals are

https://www.rd.ntt/e/research/JN202206_18551.html

Freestanding GaAs Nanowires with a Controlled Diameter and Their Optical Properties with the Radial Quantum-confinement Effect

Freestanding GaAs Nanowires with a Controlled Diameter and Their Optical Properties with the

https://www.rd.ntt/e/brl/result/activities/file/report09/report27.html

Efforts of NTT IOWN Integrated Innovation Center toward the Early Deployment of IOWN | NTT R&D Website

enable optical transmission between chips on a board, and IOWN4.0 will enable the installation of optical

https://www.rd.ntt/e/research/JN202311_23714.html

Purcell-Enhanced Single Photon Emission at Telecom Wavelengths from Quantum-Dot Nanocavities

Optical Science Laboratory, 2Nanophotonics Center, 3NTT Photonics Laboratories    A telecom-band (1.55 µm

https://www.rd.ntt/e/brl/result/activities/file/report12/report29e.html

Network-service Technology Enabled by the All-Photonics Network｜NTT R&D Website

aim to build a network that enables anyone to (i) use ultra-high-speed optical transmission and

https://www.rd.ntt/e/research/JN202108_14878.html

NTT | Exhibits | Tsukuba Forum 2026

; justify-content: center; text-align: center; line-height: normal; box-sizing: border-box; } .nttc1-text

https://www.rd.ntt/e/as/tforum/companylist_nttc5.html

Experimental demonstration of ultra-high precision optical frequency transfer via 240-km-long telecommunications fiber｜NTT Basic Research Laboratories | NTT R&D Website

optical lattice clocks (a gray shaded line in Fig. 3). Technical points Cascaded optical fiber link using

https://www.rd.ntt/e/brl/latesttopics/2020/03/latest_topics_202003181528.html

On-demand Photonic Multipoint Connection Technology Supporting High-presence Communications Services｜NTT R&D Website

, since optical transmission equipment is conventionally provided by a single vendor in an end-to-end (E2E

https://www.rd.ntt/e/research/JN202108_14889.html

Sailing × Ultra-realistic Communication Technology Kirari!｜NTT R&D Website

. 1. Example of live video transmission via offshore wide-vision display. Fig. 2. Logo of TOKYO 2020 5

https://www.rd.ntt/e/research/JN202110_15525.html

R&D Activities to Implement an Access Network for the IOWN Era | NTT R&D Website

pipelines or overhead lines. Each line housed in an optical fiber cable is accommodated in an NTT building

https://www.rd.ntt/e/research/JN202408_28842.html

Exhibits | Tsukuba Forum 2026

Exhibitors NTT   Optical Communication Technologies To create diverse services, we will introduce

https://www.rd.ntt/e/as/tforum/exhibition.html

Efficiently Accommodating High-frequency-band Wireless Systems by Using Analog Radio-over-fiber | NTT R&D Website

D/A (digital-to-analog) conversion, and the required optical transmission bandwidth can be narrowed

https://www.rd.ntt/e/research/JN20200315_h.html

Publication

, "Singlemode lightwave transmission in SOI-type photonic-crystal line-defect waveguides with phase-shifted

https://www.rd.ntt/npc/group/ryouna-g/publication-j.html

Publication

, "Singlemode lightwave transmission in SOI-type photonic-crystal line-defect waveguides with phase-shifted

https://www.rd.ntt/npc/group/ryouna-g/publication.html

Realizing a smart world.Evolution of access networks through the integration of cutting edge technology from around the world and in the field｜NTT R&D Website

and development of spatial multiplexing optical fiber technology for future transmission capacity

https://www.rd.ntt/e/network/0002.html

Publication

-Hermitian hollow nanowire cavity for generating optical orbital angular momentum", Opt. Mater. Express 16

https://www.rd.ntt/brl/group_introduction/butsuna-g/publication.html

Publication

-Hermitian hollow nanowire cavity for generating optical orbital angular momentum", Opt. Mater. Express 16

https://www.rd.ntt/brl/group_introduction/butsuna-g/publication-j.html

Achieving the Word's Highest Wireless Transmission Rate by Delving into Theories That Appeared about 100 Years Ago | NTT R&D Website

transmission comparable to optical transmission systems and (ii) seamless connection between wireless and

https://www.rd.ntt/e/research/JN202403_25301.html

The Future of Photonics-electronics Convergence Technologies and Super Computers | NTT R&D Website

will give a simple history of optical technology. Transmission can be done using electrical wiring or

https://www.rd.ntt/e/forum/2024/panel_discussion_2.html

Access Network Technologies to Implement IOWN | NTT R&D Website

that executes transmission and edge control to switch to optimal optical paths and edge resources

https://www.rd.ntt/e/research/JN202207_18784.html

Measuring an Ultrashort Soft X-Ray Pulse Shape

shape using the rapid increase in Kr+ ion density caused by optical-field induced ionization, which

https://www.rd.ntt/e/brl/result/activities/file/report01/E/report18.html

Highly Efficient, Low-cost Optical Communications through Optimal Communication Path Design Technology | NTT R&D Website

-sharing path usage method," with which various users will be able to reserve optical path, occupy the line

https://www.rd.ntt/e/research/JN202509_36072.html

International Symposium on "Mesoscopic Superconductivity and Spintronics 2006"

SQubit and a transmission line resonator, and the NTT BRL group demonstrated entanglement manipulation of

https://www.rd.ntt/e/brl/result/activities/file/report05/data03.html

My Responsibility Is to Continue Researching Speech/Audio Coding to Provide Highest Quality Services and High Reliability | NTT R&D Website

in the fixed-line network and analog transmission in the mobile network (mobile phones) and the

https://www.rd.ntt/e/research/JN20200532_h.html

Updates | NTT R&D Website

Contribute to People's Well-being 02/16/2026 Coherent Optical-amplifier-repeater Transmission Will Enable

https://www.rd.ntt/e/update_information/

Open R&D　＜2025 Annual Report＞｜NTT R&D Website

readers. In line with the globalization of NTT Group businesses, the NTT Technical Review is issued as a

https://www.rd.ntt/e/about/openrd/

Research into Ultra-high-speed Full Software Access Networks that Virtualize the Physical Layer Functionality of Communications Networks｜NTT R&D Website

in optical access equipment that has so far been handled by hardware such as optical line terminals

https://www.rd.ntt/e/research/RDNTT20211201.html

IOWN∴Quantum Leap | NTT R&D Website

classical information processing. The IOWN (Innovative Optical and Wireless Network) approach aims to

https://www.rd.ntt/e/forum/2025/keynote_2.html

Report on the NTT R&D Forum — Road to IOWN 2022｜NTT R&D Website

be provided. Because of transmission as optical wavelengths, latency can be reduced to just 1/200th

https://www.rd.ntt/e/forum/2022/keynote_1.html

NTT_TRFSW_2022_E.pdf

and transmission processing technology with the invention of the world’s first optical transistor

https://www.rd.ntt/e/download/NTT_TRFSW_2022_E.pdf

Creating New Value: Access Networks to Support a Sustainable Society | NTT R&D Website

-friendly manner. It creates optical paths at the petabit level, which is ultra-high-capacity transmission

https://www.rd.ntt/e/research/JN202408_28840.html

NTT R&D FORUM 2026 | NTT R&D Website

computing power, technology is at a major turning point. Just as optical fiber once connected the world and

https://www.rd.ntt/e/forum/2026/

Researchers Should Take Every Experience as a Positive One to Improve Their Well-being | NTT R&D Website

controller for real-time optical-path switching of the IOWN APN line via eCTI (Fig. 5). Fig. 5. Operation

https://www.rd.ntt/e/research/JN202410_29838.html

Realization of an ultra-energy-saving electro-optic modulator and highly-efficient optical transistor｜NTT Basic Research Laboratories | NTT R&D Website

Realization of an ultra-energy-saving electro-optic modulator and highly-efficient optical

https://www.rd.ntt/e/brl/latesttopics/2019/04/latest_topics_201904161802.html

Wireless Technology Supporting People to Live a Fulfilling Social Life | NTT R&D Website

was linked to a controller able to switch at the optical path level on an IOWN APN line, using the

https://www.rd.ntt/e/research/JN202408_28848.html

High-frequency-band Distributed Antenna System Technology Exploring the Possibilities of Higher Frequency Bands for Mobile Communications | NTT R&D Website

work involves a broad range of fields including circuit-line technology, optical technology, wireless

https://www.rd.ntt/e/research/JN202404_25756.html

english.pdf

demonstrated 2D photonic crystal and line-defect structures with good transmission characteristics for the

https://www.rd.ntt/e/brl/result/activities/file/report00/english.pdf

Next-generation Energy Technology Contributing to Zero Environmental Impact | NTT R&D Website

Optical and Wireless Network (IOWN) and artificial intelligence/machine learning (Al/ML). For this

https://www.rd.ntt/e/research/JN202212_20353.html

Machine Learning Using an On-chip Photonic Neural Network--Changing the Future through Photonic Technology | NTT R&D Website

Technology machine learning optical circuit optical computing Artificial intelligence (AI) is now entering

https://www.rd.ntt/e/research/JN202406_26663.html

IOWN INTEGRAL | NTT R&D Website

the transmission delay of optical fiber is said to be 15 ms, this means that we have achieved stable

https://www.rd.ntt/e/forum/2024/keynote_2.html

Keynote Speech 1｜Report on the NTT R&D Forum 2021｜NTT R&D Website

-electronics-converged device that enables both inter-chip and intra-chip optical transmission. In the era of

https://www.rd.ntt/e/forum/2021/keynote_1.html

Broadband Continuous-wave Optical Quadrature Squeezer for Ultra-fast Optical Quantum Computers | NTT R&D Website

ferroelectric material with a wide transmission bandwidth and high second-order nonlinear optical coefficient

https://www.rd.ntt/e/research/JN202206_18572.html

ATII_WP3_WP_v1.pdf

Gigabit-capable Passive Optical Network GTC G-PON Transmission Convergence HTTP Hypertext Transfer

https://www.rd.ntt/as/img/fasa/ATII_WP3_WP_v1.pdf

Electrical Control of Plasmon Reflectivity in Graphene | NTT R&D Website

electrically tunable metamaterials*1. ＊1 Metamaterial: An artificial material the optical properties of which

https://www.rd.ntt/e/research/JN202303_21254.html

Latest Activities in the IOWN Global Forum | NTT R&D Website

optical network With a view to creating a smart world, the concept of the Innovative Optical and Wireless

https://www.rd.ntt/e/research/JN202312_24187.html

List of Exhibitions | NTT R&D Website

cryptography with photonic circuits, we ensure high security and improve convenience of next-generation optical

https://www.rd.ntt/e/forum/2024/exhibit.html

Keynote speech 1｜Report on the NTT R&D Forum 2020｜NTT R&D Website

initiative aimed at implementing our Innovative Optical and Wireless Network (IOWN) concept. This article is

https://www.rd.ntt/e/forum/2020/keynote_1.html

Development of an Optomechanical Device with Extremely Low Optical Energy Loss | NTT R&D Website

band (about 1.5 μm) suitable for long-distance transmission, it has been applied to lasers and optical

https://www.rd.ntt/e/research/JN202202_17215.html

Researchers Are the Source of Social Progress. Be Confident in Your Research Theme and Aim for the Next Big Topic | NTT R&D Website

coding increased thanks to its ability to ensure quality under the severe limitations on transmission bit

https://www.rd.ntt/e/research/JN202302_20970.html

OpticalNetworkControllerNBISpecification_V1.0.1.xlsx

authentication ・HTTP authentication Request syntax Request line (*3) GET https://{Optical Network Controller IP

https://www.rd.ntt/e/ns/2025/11/28/OpticalNetworkControllerNBISpecification_V1.0.1.xlsx

Report on the NTT R&D Forum 2018 (Autumn) | NTT R&D Website

options based on FASA. An Optical Line Terminal (OLT) is an endpoint device at the central office for FTTH

https://www.rd.ntt/e/forum/forum2018_autumn.html

Creating a photonic topological insulator by current injection｜NTT Basic Research Laboratories | NTT R&D Website

- and line-shaped defects in such photonic crystals function as minute optical cavities and waveguides

https://www.rd.ntt/e/brl/latesttopics/2018/11/latest_topics_201811201351.html

Research Activities

oscillations along the dot-dash line corresponding to correlated coherent oscillations of the first qubit. (d

https://www.rd.ntt/e/brl/result/activities/file/report09/BRLreport_2009E.pdf

Social Well-being Achieved through Social Infrastructure That Is Friendly to People and the Planet | NTT R&D Website

, we are using optical technology--from transmission to data processing--and incorporating the features

https://www.rd.ntt/e/research/JN202408_28836.html

Innovation in Computing Powered by Photonic Technology--Evolution toward IOWN 2.0 and 3.0, and the Leap to Quantum | NTT R&D Website

5000 optical engines per month per manufacturing line. Going forward, we plan to expand to at least

https://www.rd.ntt/e/forum/2025/keynote_1.html