Result for "Optical fiber measurement",181

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

-mode optical measurement technology is essential for high-quality, next-generation optical-fiber

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

Atsushi Nakamura | NTT R&D Website

Optical measurement technologies for realizing next-generation optical fiber transmission lines We aim to

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

Hiroshi Takahashi | NTT R&D Website

/center/dept Optical measurement technologies for environmental monitoring using optical fiber networks We

https://www.rd.ntt/e/organization/researcher/special/s_085.html

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

measurement technology focuses on these features. When using an optical fiber network for communication

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

Existing Optical Communication Infrastructure Will Lead the Future of Social Contribution through Optical Fiber Sensing Technology | NTT R&D Website

the optical fiber. By combining it with NTT’s optical measurement technology to increase sensing

https://www.rd.ntt/e/research/JN202601_37939.html

Optical Technologies for Optical Quantum Computing with Continuous Variables | NTT R&D Website

. Configuration of optical fiber communications and continuous-variable optical quantum computer. ＊2 Measurement

https://www.rd.ntt/e/research/JN202304_21560.html

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

-traffic-measurement results with optical fiber cables laid in field. Optical-fiber environmental

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

Ultra-high-precision frequency transmission technology enables optical lattice clock network concept｜NTT R&D Website

-high-precision optical lattice clock with a measurement error of 1 × 10-18 or less, differences in

https://www.rd.ntt/e/communication_device/0004.html

Takeo Sasai | NTT R&D Website

capable of visualizing the entire length of optical fiber links without dedicated measurement equipment

https://www.rd.ntt/e/organization/researcher/special/s_106.html

Other Corporations | Exhibits | Tsukuba Forum 2026

.,Ltd.  MARUBUN CORPORATION  MIKI Inc,  A specialized trading company in optical fiber measurement

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

100,000-spin coherent Ising machine｜NTT Basic Research Laboratories | NTT R&D Website

DOPO pulses were generated in a ring cavity that included a 1-km optical fiber, and the pulses were

https://www.rd.ntt/e/brl/latesttopics/2021/09/latest_topics_202109301549.html

Research

optical parametric oscillators”. Fig: Coherent Ising machine with measurement-feedback. S. Utsunomiya, K

https://www.rd.ntt/brl/people/htakesue/research.html

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

light are separated and injected to each output optical fiber [14]. Squeezing-level measurement The

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

Access Network Innovative Technology and Development Project | NTT R&D Website

maintenance of access network (railway and civil engineering), as well as the development of optical fiber

https://www.rd.ntt/e/ntc/theme/infra.html

C21-e.pdf

Commercialization Schedule #Safety & Security #Risk Management Underground optical fiber cables monitor the urban

https://www.rd.ntt/forum/2025/doc/C21-e.pdf

Large-scale artificial spin network realized using long-distance optical fiber cavity｜NTT Basic Research Laboratories | NTT R&D Website

Large-scale artificial spin network realized using long-distance optical fiber cavity｜NTT Basic

https://www.rd.ntt/e/brl/latesttopics/2016/04/latest_topics_201604181637.html

Optical-lattice-clock-network Technology for Gravitational Potential Sensing | NTT R&D Website

construction of the ultrahigh-precision optical frequency transmission fiber link in the Tokyo metropolitan

https://www.rd.ntt/e/research/JN202304_21619.html

no_23_en.pdf

from an entangled pair state, will be realized over optical fiber networks. We have achieved an

https://www.rd.ntt/brl/event/splaza2009/poster/EN/no_23_en.pdf

Demonstration of a CEO-locked Frequency Comb at Telecommunications Wavelengths with Low Pulse Energy

ruler" with a cesium atomic clock for controlling the spacing. Optical frequency measurement is one of

https://www.rd.ntt/e/brl/result/activities/file/report07/report28.html

Optoelectronic Subsystem Research Group｜Device Technology Laboratories｜NTT R&D Website

Research Group Introduction We are developing optical interconnect technology for high-speed and low-power

https://www.rd.ntt/e/dtl/technology/optoelectronic_subsystem_research_group_ntt_device_technology_laboratories_ntt_rd_website.html

Optical Circuit Technologies for Next-generation Computing Using Light | NTT R&D Website

devices have been developed for optical fiber communications by using planar lightwave circuit (PLC

https://www.rd.ntt/e/research/JN202206_18579.html

A new scheme for manipulating the color of single photons｜NTT Basic Research Laboratories | NTT R&D Website

- Lossless wavelength conversion of single photons in an optical fiber - NTT Basic Research Laboratories has

https://www.rd.ntt/e/brl/latesttopics/2016/03/latest_topics_201603262135.html

Quantum Neural Network on Cloud｜NTT Basic Research Laboratories | NTT R&D Website

setup of the QNN, which is based on an optical fiber cavity comprising a 1-km-long optical fiber and an

https://www.rd.ntt/e/brl/latesttopics/2017/11/latest_topics_201711201940.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

An on-chip quantum buffer realized｜NTT Basic Research Laboratories | NTT R&D Website

photon pairs via spontaneous four-wave mixing *7 in an optical fiber and used them for the delay

https://www.rd.ntt/e/brl/latesttopics/2013/11/latest_topics_201311130702.html

Heterogeneous Materials and Devices Research Group｜Device Technology Laboratories｜NTT R&D Website

business opportunities in the fields of measurement, computation, and communications. Focusing on optical

https://www.rd.ntt/e/dtl/technology/heterogeneous_materials_and_devices_research_group_ntt_device_technology_laboratories_ntt_rd_website.html

Accelerating Practical Application of 4-core Optical Fiber with the Same Cladding Diameter as Current Optical Fiber and Advancing Power-over-fiber Technology | NTT R&D Website

Accelerating Practical Application of 4-core Optical Fiber with the Same Cladding Diameter as

https://www.rd.ntt/e/research/JN202502_32098.html

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

0 or π. The modulated packet is then sent to Bob through an optical fiber. Bob is equipped with a

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

List of Visitors' Talks (Fiscal 2007)

"Symmetries and Cryptography" Feb. 27 Mr. Tony Pisano NP Photonics, U.S.A. "Recent Status in Optical Fiber

https://www.rd.ntt/e/brl/result/activities/file/report07/data07.html

Highly Sensitive Detection and Control of a Nanowire Mechanical Resonator Using an Optical Microcavity | NTT R&D Website

optical fiber is brought into contact with this glass ball, a cavity-optical mode called the whispering

https://www.rd.ntt/e/research/JN202202_17217.html

Coherent Ising Machine for Combinatorial Optimization Problems

implement all-to-all optical couplings among DOPOs, we employed a measurement and feedback (MFB) scheme [Fig

https://www.rd.ntt/e/brl/result/activities/file/report16/report19E.html

Contents

Piezoresistance of InAs/AlGaSb Heterostructure Nanobeam Energy Distribution Measurement of Nonequilibrium Carriers

https://www.rd.ntt/e/brl/result/activities/file/report07/2007_E.html

List of Invited Talks at International Conferences (2007)

-Scale Optical Integration", Optical Fiber Communication Conference/National Fiber Optic Engineers

https://www.rd.ntt/e/brl/result/activities/file/report07/data11.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

国際会議招待講演一覧 (2006)

-Scale Optical Integration", Optical Fiber Communication Conference/National Fiber Optic Engineers

https://www.rd.ntt/brl/result/activities/file/report07/data10.html

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

experience (EX). We are conducting R&D of cutting-edge elemental technologies in five areas (optical-fiber

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

Publications

Y. Yamamoto, "Long-distance entanglement-based quantum key distribution over optical fiber," Opt

https://www.rd.ntt/brl/people/htakesue/papers.html

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

, optical fiber access technology, infrastructure technology, and operation technology, to achieve its

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

Quantum State Tomography for High-dimensional Time-bin States

-dimensional Time-bin States Takuya Ikuta and Hiroki Takesue Optical Science Laboratory High-dimensional

https://www.rd.ntt/e/brl/result/activities/file/report16/report20E.html

Generation of Energy-Time Entangled Photon Pairs in 1.5-μm Band

telecom band is essential for quantum communication over optical fiber networks[1, 2]. In this paper, we

https://www.rd.ntt/e/brl/result/activities/file/report05/report27.html

Toward a Quantum Internet | NTT R&D Website

-point quantum communication network worldwide. For example, if we use a standard optical fiber as the

https://www.rd.ntt/e/research/JN202304_21666.html

Development of Membrane Optical Modulators for IOWN | NTT R&D Website

increase in Internet traffic, the application area where optical fiber can show its superiority has been

https://www.rd.ntt/e/research/JN202206_18502.html

Photonic-Crystal Single-Mode Waveguide

-mode optical waveguide. Fig. 2. Group dispersion of photonic-crystal waveguide (measurement). Group

https://www.rd.ntt/e/brl/result/activities/file/report01/E/report20.html

Transport Innovation Laboratory | NTT Network Innovation Laboratories | NTT R&D Website

reflectometers (OTDR) are used for this purpose. However, this method required the measurement at all optical

https://www.rd.ntt/e/mirai/organization/product_4/

来訪者による講演一覧　（2007年度）

27日 Mr. Tony Pisano NP Photonics, U.S.A. 「Recent Status in Optical Fiber Lasers in Telecom-band」 3月17

https://www.rd.ntt/brl/result/activities/file/report07/data06.html

C21-j.pdf

ファイバケーブルで測定 Measurement of micro-vibrations with underground optical fiber cables. 【関連Link】 ー https

https://www.rd.ntt/forum/2025/doc/C21-j.pdf

Generation of High-Purity Entangled Photon Pairs Using Silicon Wire Waveguide

* Optical Science Laboratory, *Microsystem Integration Laboratories Recently, 1.5-µm band entangled photon

https://www.rd.ntt/e/brl/result/activities/file/report08/report27.html

Quantum Optical State Control Research Group | NTT Basic Research Laboratories | NTT R&D Website

degenerate optical parametric oscillator pulses generated using a nonlinear fiber Sagnac loop Opt. Lett. 45

https://www.rd.ntt/e/brl/group_introduction/group_009.html

Latest Research Contents | NTT Basic Research Laboratories | NTT R&D Website

-high precision optical frequency transfer via 240-km-long telecommunications fiber 03/06/2020

https://www.rd.ntt/e/brl/latesttopics/

Performance Comparison between Coherent Ising Machines and Quantum Annealer｜NTT R&D Website

turning on and off the PSA placed in a 1-km optical fiber with a 1-GHz frequency (Fig. 1). The interaction

https://www.rd.ntt/e/research/JN202103_10945.html

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

various services emerge and spread. To support this growth in traffic, optical-fiber transmission

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

List of Visitors’ Talks

) Development of optical lattice clocks and delivery of the clock frequency using an optical fiber link Mar. 22

https://www.rd.ntt/e/brl/result/activities/file/report15/data03E.html

First high-speed quantum-safe randomness generation with realistic devices｜NTT Basic Research Laboratories | NTT R&D Website

optical pulse with time-bin encoding *4 we show that every 0.1 seconds a block of 8192 quantum-safe random

https://www.rd.ntt/e/brl/latesttopics/2021/02/latest_topics_202102241509.html

IOWN∴Quantum Leap | NTT R&D Website

that this device enables high-speed quantum measurement. Optical communications and optical quantum

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

50 Years at Tsukuba R&D Center | NTT R&D Website

Laboratories 50 Years at Tsukuba R&D Center access network infrastructure optical fiber NTT Access Network

https://www.rd.ntt/e/research/JN202207_18754.html

Updates | NTT R&D Website

Communication Infrastructure Will Lead the Future of Social Contribution through Optical Fiber Sensing

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

optomechanics.html

approach with optical gain realizes highly sensitive displacement measurement in nano- and micro-mechanical

https://www.rd.ntt/brl/group_introduction/butsume-g/optomechanics.html

List of Research Papers Published in International Journals

-correlated photon pairs in optical fiber: Influence of spontaneous Raman scattering," Jpn. J. Appl. Phys

https://www.rd.ntt/e/brl/result/activities/file/report04/data15.html

Moving Ising Machines Forward While Taking a Step towards Quantum Networks by Multi-photon Entangled States Based on Time-bin Qubits | NTT R&D Website

an optical fiber [4]. This experiment was the world's first to generate quantum entanglement in an

https://www.rd.ntt/e/research/JN202506_34177.html

Toshimori Honjo, Ph.D.

distribution over optical fiber network. Differential phase shift quantum key distribution (DPS-QKD) Quantum

https://www.rd.ntt/brl/people/honjo/

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

degenerate optical parametric oscillator pulses generated using a nonlinear fiber Sagnac loop Opt. Lett. 45

https://www.rd.ntt/brl/group_introduction/group_009.html

Study on Open All-Photonic Network in IOWN Global Forum | NTT R&D Website

-Photonic Network (Open APN) to provide direct optical paths between any location on demand to implement use

https://www.rd.ntt/e/research/JN202203_17536.html

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

and optical measurement of optical devices. The technology consists of the following three elements

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

Annual_report_2020_E.pdf

optical frequency transfer over a 200-km fiber with accuracy exceeding that of optical lattice clocks. We

https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2020_E.pdf

英文論文一覧

in optical fiber: Influence of spontaneous Raman scattering," Jpn. J. Appl. Phys. Part 1 - Regul. Pap

https://www.rd.ntt/brl/result/activities/file/report04/data15.html

Security Based on Quantum Information Technology and Data Protection of Quantum Information｜NTT R&D Website

the readout measurement results (Fig. 1). In this case, the resource required for quantum error

https://www.rd.ntt/e/research/JN202104_12240.html

NTT R&D Forum - Road to IOWN 2022｜NTT R&D Website

fiber environmental monitoring We use environment information from optical fiber network N-E18IOWN

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

The Future Pioneered by Device Technology for a Sustainable Society｜NTT R&D Website

-precision sensing technologies. In addition to conventional electrocardiographic measurement and

https://www.rd.ntt/e/research/JN202104_11918.html

Infrastructure technologies | NTT Access Network Service Systems Laboratories | NTT R&D Website

environmental load in the construction of the new social infrastructure. Other Access system Optical Fiber

https://www.rd.ntt/e/as/theme/03.html

山本 喜久｜NTT R&D Website

. Lett. 58, 1000-1003 (March 1987). Y. Yamamoto and T. Kimura, "Coherent optical fiber transmission

https://www.rd.ntt/organization/authority/008.html

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

Traditionally, NTT's optical transmission networks have used dispersion shifted fiber (DSF)[2], which is

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

Annual_report_2024_E.pdf

that combines an optical cavity and a mechanical resonator using a glass fiber as thin as a hair and

https://www.rd.ntt/brl/brl/result/activities/file/annual_report/Annual_report_2024_E.pdf

NTTBrl_honbun_E_250225.indd

sensor element that combines an optical cavity and a mechanical resonator using a glass fiber as thin as

https://www.rd.ntt/brl/result/activities/file/annual_report/NTTBrl_E_250321_print.pdf

Quantum Optical Physics Research Group | NTT Basic Research Laboratories | NTT R&D Website

. Sanada, and K. Oguri "Single-comb Vernier method for precise optical-frequency measurement" Opt. Express

https://www.rd.ntt/e/brl/group_introduction/group_010.html

Toshikazu Hashimoto | NTT R&D Website

/center/dept Research on optical circuit technology to manipulate lightwaves for novel information

https://www.rd.ntt/e/organization/researcher/superior/s_028.html

Developing a Theory for a Quantum Internet for Global Quantum Communication | NTT R&D Website

, optical fiber and free space are used as communication channels, and signals are amplified using repeaters

https://www.rd.ntt/e/research/JN202408_28857.html

Applying Optical Oscillator Networks to Diverse Problems as the First Step to Information Processing Systems of the Future | NTT R&D Website

optical pulses in a ring of optical fiber much like running trains on the Yamanote loop line in Tokyo

https://www.rd.ntt/e/research/JN202306_22121.html

List of Exhibitions | NTT R&D Website

the detail PDF Research Network γ10-16Space-division multiplexing optical fiber cable technology

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

NTT R&D FORUM 2025 Event Report | NTT R&D Website

2," as well as sustainability, represented by optical fiber sensing, autonomous and remote driving

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

学術論文出版一覧

. Matsuzaki, I. G. Savenko, and M. Mottonen, "Parity Measurement of Remote Qubits Using Dispersive Coupling

https://www.rd.ntt/brl/result/activities/file/report15/data10J.html

Publication List

, Y. Matsuzaki, I. G. Savenko, and M. Mottonen, "Parity Measurement of Remote Qubits Using Dispersive

https://www.rd.ntt/e/brl/result/activities/file/report15/data09E.html

Annual_report_2019_E.pdf

the private capacity of a point-to-point （Pt2Pt） optical fiber link by using a repeater node between

https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2019_E.pdf

NTTBrl_honbun_E_220301-2.indd

( < mm) Inter-chip-com (1mm–1cm) Optical data-com (1m–100m) Optical fiber tele-com (> 1 km) Shrink of

https://www.rd.ntt/e/brl/result/activities/file/annual_report/Annual_report_2021_E.pdf

橋本 俊和 | NTT R&D Website

, Hidetoshi; Hashimoto, Toshikazu; "Optical frequency distribution using laser repeater stations with planar

https://www.rd.ntt/organization/researcher/superior/s_028.html

論文｜NTT物性科学基礎研究所｜NTT R&D Website

). J. Govenius, Y. Matsuzaki, I. G. Savenko, and M. Mottonen Parity measurement of remote qubits using

https://www.rd.ntt/brl/result/publications/paper_2015.html

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

measurement of remote qubits using dispersive coupling and photodetection" Phys. Rev. A 92 (4), 042305 (2015

https://www.rd.ntt/e/brl/result/publications/paper_2015.html

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

.6 Tbit/s Optical Transmission Experiment with Multi-core Fiber Cable Installed in a Field

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

量子光デバイス研究グループ｜NTT 物性科学基礎研究所｜NTT R&D Website

for precise optical-frequency measurement" Opt. Express 33 (8), 16684-16695 (2025). T. Okajima, R

https://www.rd.ntt/brl/group_introduction/group_010.html

Technical Study on IOWN for Mobile Networks | NTT R&D Website

using fiber-based optical transport networks for mobile networks that use the data-centric

https://www.rd.ntt/e/research/JN202312_24191.html

論文｜NTT物性科学基礎研究所｜NTT R&D Website

Amplification Of Number States By Nondegenerate Parametric Oscillators With Idler-Measurement Feedback" Phys

https://www.rd.ntt/brl/result/publications/paper_1988.html

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

Number States By Nondegenerate Parametric Oscillators With Idler-Measurement Feedback" Phys. Rev. A 37 (1

https://www.rd.ntt/e/brl/result/publications/paper_1988.html

Changing the World through Basic Research on Light Demands a Pioneering Spirit and Results beyond the Ordinary | NTT R&D Website

stable representation of spins. By using this OPO to generate 2000 optical pulses within an optical fiber

https://www.rd.ntt/e/research/JN20180651_h.html

AS Information | NTT R&D Website

） 論文採録 2023.12.14光センシング分野の最高峰の国際会議の１つである28th International Conference on Optical Fiber Sensors（OFS-28

https://www.rd.ntt/as/info/

Long-distance Laser-energy Transmission for Space Solar Power Systems and Their Application on Earth | NTT R&D Website

measured through current-voltage (IV) measurement*6. Fig. 5. Schematic of optical system of energy

https://www.rd.ntt/e/research/JN202401_24534.html

Observation of Exceptional Point Degeneracy with Current-injected Photonic Crystal Lasers | NTT R&D Website

of their gain and loss are non-Hermitian optical systems, which are based on energy-non-conserving

https://www.rd.ntt/e/research/JN202206_18514.html

english.pdf

Optical Materials Research ････････････････････ 24 ♦Optical Parametric Amplification in Fiber ♦Efficient X

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

NTT-BRL Research Activities Vol 19

important receptor in pain sensation, with atomic force microscopy (AFM). (Page 20) Direct Measurement of

https://www.rd.ntt/e/brl/result/activities/file/report08/BRLreport_2008E.pdf

Activity report

Electron reflectivity map Measurement results: relation- ship between resistance and beam deflection

https://www.rd.ntt/e/brl/result/activities/file/report07/BRLreport_2007E.pdf

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

"Photonic-crystal optical parametric oscillator" (Early Access Article) Nat. Photonics (2020). T. Ikuta, T

https://www.rd.ntt/e/brl/result/publications/paper_2020.html

論文｜NTT物性科学基礎研究所｜NTT R&D Website

. Ishizawa, K. Hitachi, and K. Oguri "Low-noise optical measurement of sound using midfringe locked

https://www.rd.ntt/brl/result/publications/paper_2021.html