Takeshi Fujisawa

发表

Extremely small group delay spread six-core fiber with air-holes for mode-division-multiplexing: A principal mode analysis

Kunimasa Saitoh, Takeshi Fujisawa, Ren Tojo, 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).

A Review of PLC-Based Broadband Two-Mode Multi/Demultiplexer Designed by Wavefront Matching Method

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2018, IEICE Trans. Electron..

Ultra-Robust Design of Mode (De)Multiplexer Based on Asymmetrical Directional Coupler Using Wire and One-Side Rib Waveguides

Kunimasa Saitoh, Takeshi Fujisawa, Takanori Sato, 2019, 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC).

Broadband LP 01 /LP 11 PLC-based mode multi/demultiplexer designed by wavefront matching method

Taiji Sakamoto, Kunimasa Saitoh, Takeshi Fujisawa, 2015 .

Transmission of 214-Gbit/s 4-PAM signal using an ultra-broadband lumped-electrode EADFB laser module

Hiroshi Yamazaki, Yuta Ueda, Takeshi Fujisawa, 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).

C-3-2 A study on a PLC-based LP_ mode rotator with a curved trench

Taiji Sakamoto, Kazuhide Nakajima, Takeshi Fujisawa, 2015 .

Design and Fabrication of Broadband PLC-Based Two-Mode Multi/Demultiplexer Using a Wavefront Matching Method

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2017, Journal of Lightwave Technology.

3-Mode PLC-Based Mode Dependent Loss Equalizer in MDM Transmission

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2019, 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC).

First Experimental Demonstration of Wavefront-Matching-Method-Designed Silicon Mode Converters

Kunimasa Saitoh, Takeshi Fujisawa, Yusuke Sawada, 2019, 2019 Optical Fiber Communications Conference and Exhibition (OFC).

Long-Reach 100 Gbit Ethernet Light Source Based on 4×25-Gbit/s 1.3-µm InGaAlAs EADFB Lasers

Naoki Fujiwara, Takeshi Fujisawa, Shigeru Kanazawa, 2011, IEICE Trans. Electron..

A photonic-plasmonic mode converter using mode-coupling-based polarization rotation for metal-inserted silicon platform

Yuhei Ishizaka, Kunimasa Saitoh, Takeshi Fujisawa, 2017, IEICE Electron. Express.

400-Gb/s operation of flip-chip interconnection EADFB laser array module

Yuta Ueda, Takeshi Fujisawa, Hiroaki Sanjoh, 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

Scrambling-type three-mode multiplexer based on cascaded Y-branch waveguide with integrated mode rotator on PLC platform

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2017, 2017 Optical Fiber Communications Conference and Exhibition (OFC).

Ultracompact, 160-Gbit/s transmitter optical subassembly based on 40-Gbit/s×4 monolithically integrated light source

Hiroyuki Ishii, Yuta Ueda, Takeshi Fujisawa, 2012 .

Electroabsorption modulator integrated light sources for future high-speed ethernet

Hiroyuki Ishii, Takeshi Fujisawa, Shigeru Kanazawa, 2012 .

56-Gbaud 4-PAM (112-Gbit/s) operation of flip-chip interconnection lumped-electrode EADFB laser module for equalizer-free transmission

Hiroshi Yamazaki, Yuta Ueda, Takeshi Fujisawa, 2016, 2016 Optical Fiber Communications Conference and Exhibition (OFC).

Low-Loss and Fabrication-Tolerant Si Four-Wavelength Multiplexer using Higher-Order Mode for 100/400GbE

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2019, 2019 Optical Fiber Communications Conference and Exhibition (OFC).

Ultrasmall two-mode dividers based on mosaic structure designed by direct-binary-search algorithm aided by artificial neural network

Kunimasa Saitoh, Takeshi Fujisawa, 2020, 2020 Opto-Electronics and Communications Conference (OECC).

Transmission characteristics of laterally illuminated photonic crystal fibers

Kunimasa Saitoh, Masanori Koshiba, Takeshi Fujisawa, 2006, IEICE Electron. Express.

Cladding Diameter Dependence of Inter-Core Crosstalk in Heterogeneous Multicore Fibers

Kazuhiko Aikawa, Kunimasa Saitoh, Takeshi Fujisawa, 2019, 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC).

PLC-Based LP11 Mode Rotator With Curved Trench Structure Devised From Wavefront Matching Method

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2017, IEEE Photonics Technology Letters.

PLC-based mode controlling devices for mode-division-multiplexing

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2018, 2018 23rd Opto-Electronics and Communications Conference (OECC).

A Broadband Mode Divider with Arbitrary Branching Ratio Based on Wavelength-Insensitive Coupler

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2019, 2019 Optical Fiber Communications Conference and Exhibition (OFC).

The effects of providing a space for students to progress with self-directed free study

Takeshi Fujisawa, Matthew Bailey, 2015, 2015 IEEE 7th International Conference on Engineering Education (ICEED).

CMOS-compatible Si-wire polarization beam splitter based on wavelength-insensitive coupler

Takanori Sato, Kunimasa Saitoh, Takeshi Fujisawa, 2019, IEICE Electron. Express.

Evaluation of the affect of speech intonation using a model of the perception of interval dissonance and harmonic tension

Takeshi Fujisawa, Norman D. Cook, Kazuaki Takami, 2003, INTERSPEECH.

A Design of Low MDL Scrambling-type PLC 6-mode Multiplexer

Kazuhide Nakajima, Kunimasa Saitoh, Takeshi Fujisawa, 2019, 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC).

One chip, PLC three-mode exchanger based on symmetric and asymmetric directional couplers with integrated mode rotator

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2017, 2017 Optical Fiber Communications Conference and Exhibition (OFC).

Group Delay Spread Analysis of Few-Mode, Coupled 3-Core Fibres: Optimum Index Profile and Maximum Transmission Distance for Strong Coupling Regime

Kunimasa Saitoh, Takeshi Fujisawa, Takanori Sato, 2017, 2017 European Conference on Optical Communication (ECOC).

Digital teaching materials of Kosen fundamental mathematics for Bilingual Engineering Education

Takeshi Fujisawa, Akiko Nakatani, Tadakazu Sakakura, 2018, 2018 IEEE 10th International Conference on Engineering Education (ICEED).

Experimental Demonstration of Broadband Silicon 4-Mode (de)Multiplexer Designed by Wavefront-Matching Method

Kunimasa Saitoh, Takeshi Fujisawa, Yusuke Sawada, 2021, 2021 Optical Fiber Communications Conference and Exhibition (OFC).

Bayesian direct-binary-search algorithm for the efficient design of mosaic-based power splitters

Kunimasa Saitoh, Takeshi Fujisawa, K. Saitoh, 2021 .

Numerical investigation and optimization of a photonic crystal fiber for simultaneous dispersion compensation over S + C + L wavelength bands

Kunimasa Saitoh, Masanori Koshiba, Takeshi Fujisawa, 2007 .

Low-loss, compact, and fabrication-tolerant Si-wire 90° waveguide bend using clothoid and normal curves for large scale photonic integrated circuits.

Kunimasa Saitoh, Takeshi Fujisawa, Shuntaro Makino, 2017, Optics express.

Coiling Size Dependence of Group Delay Spread in Coupled Multicore Fibers Without Intentional Twisting

Kunimasa Saitoh, Takeshi Fujisawa, Takanori Sato, 2017, Journal of Lightwave Technology.

Crosstalk Analysis of Heterogeneous Multicore Fibers Using Coupled-Mode Theory

Yusuke Sasaki, Kazuhiko Aikawa, Kunimasa Saitoh, 2017, IEEE Photonics Journal.

Scrambling-Type Three-Mode PLC Multiplexer Based on Cascaded Y-Branch Waveguide With Integrated Mode Rotator

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2018, Journal of Lightwave Technology.

Novel design of inherently gain-flattened discrete highly nonlinear photonic crystal fiber Raman amplifier and dispersion compensation using a single pump in C-band.

Kunimasa Saitoh, Masanori Koshiba, Takeshi Fujisawa, 2005, Optics express.

Polarization-independent optical directional coupler based on slot waveguides.

Masanori Koshiba, Takeshi Fujisawa, M. Koshiba, 2006, Optics letters.

Full-vector finite-element beam propagation method for three-dimensional nonlinear optical waveguides

Takeshi Fujisawa, M. Koshiba, M. Koshiba, 2002 .

Finite element characterization of chromatic dispersion in nonlinear holey fibers.

Masanori Koshiba, Takeshi Fujisawa, M. Koshiba, 2003, Optics express.

Chromatic dispersion profile optimization of dual-concentric-core photonic crystal fibers for broadband dispersion compensation.

Kunimasa Saitoh, Masanori Koshiba, Takeshi Fujisawa, 2006, Optics express.

Development of the Wavefront Matching Method Based on the 3-D Finite-Element Method and Its Application to Si-wire Mode Converters

Kunimasa Saitoh, Takeshi Fujisawa, Yusuke Sawada, 2018, Journal of Lightwave Technology.

Optimal design of 4LP-mode multicore fibers for high spatial multiplicity.

Kazuhiko Aikawa, Shinichi Aozasa, Taiji Sakamoto, 2017, Optics express.

Design and Analysis of Weakly- and Strongly-coupled Multicore Fibers

Kunimasa Saitoh, Takeshi Fujisawa, Takanori Sato, 2017 .

All-optical logic gates based on nonlinear slot-waveguide couplers

Masanori Koshiba, Takeshi Fujisawa, M. Koshiba, 2006 .

Time-Domain Beam Propagation Method for Nonlinear Optical Propagation Analysis and Its Application to Photonic Crystal Circuits

Masanori Koshiba, Takeshi Fujisawa, M. Koshiba, 2003 .

Apodized photonic crystal waveguide gratings.

Kunimasa Saitoh, Masanori Koshiba, Takeshi Fujisawa, 2006, Optics express.

Impulse Response Analysis of Strongly-Coupled Three-Core Fibers

Kunimasa Saitoh, Takeshi Fujisawa, 2015 .

Dependence of Cladding Diameter on Inter-core Crosstalk in Heterogeneous Multi-core Fibers

Kazuhiko Aikawa, Kunimasa Saitoh, Masanori Koshiba, 2018, 2018 23rd Opto-Electronics and Communications Conference (OECC).

Demonstration of PLC-based six-mode multiplexer for mode division multiplexing transmission

Taiji Sakamoto, Yuhei Ishizaka, Kunimasa Saitoh, 2015, 2015 European Conference on Optical Communication (ECOC).

PLC-based mode multi/demultiplexers for mode division multiplexing

Taiji Sakamoto, Kazuhide Nakajima, Kunimasa Saitoh, 2017 .