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Yusuke Sawada

High-power, stable single-mode CW operation of 1550 nm wavelength InP-based photonic-crystal surface-emitting lasers
2024 · Takeshi Aoki, Yuhki Itoh, et al. · Applied Physics Express · 23
High-power and high-efficiency operation of 1.3 µm-wavelength InP-based photonic-crystal surface-emitting lasers with metal reflector
2024 · Yuhki Itoh, Takeshi Aoki, et al. · Optics Express · 21
Development of the Wavefront Matching Method Based on the 3-D Finite-Element Method and Its Application to Si-wire Mode Converters
2018 · Yusuke Sawada, Takanori Sato, et al. · Journal of Lightwave Technology · 19
Low-Loss and Small 2 × 4λ Multiplexers Based on 2 × 2 and 2 × 1 Mach–Zehnder Interferometers With On-Chip Polarization Multiplexing for 400GbE
2020 · Takeshi Fujisawa, Junya Takano, et al. · Journal of Lightwave Technology · 18
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Power Scalability of 1.55-μm-Wavelength InP-Based Double-Lattice Photonic-Crystal Surface-Emitting Lasers With Stable Continuous-Wave Single-Mode Lasing
2024 · Yuhki Itoh, Takeshi Aoki, et al. · IEEE Journal of Selected Topics in Quantum Electronics · 14
Broadband and compact silicon mode converter designed using a wavefront matching method
2020 · Yusuke Sawada, Takeshi Fujisawa, et al. · Optics Express · 13
A novel Si four-wavelength multiplexer for 100/400GbE using higher-order mode composed of (a)symmetric directional couplers and TE1-TM0 mode converter
2019 · Takeshi Fujisawa, Junya Takano, et al. · Optics Express · 12
Direct-binary-search algorithm for fabrication-tolerant photonic-crystal-like subwavelength structures and its application to a four-mode waveguide crossing in 2 μ m waveband
2022 · Taichi Muratsubaki, Takeshi Fujisawa, et al. · Japanese Journal of Applied Physics · 11
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Ultrasmall Power Splitters With Triangular Lattice Mosaic Patterns Designed by Bayesian DBS Method
2023 · Takeshi Fujisawa, Takuya Mitarai, et al. · IEEE Photonics Technology Letters · 9
Modal amplitude and phase estimation of multimode near field patterns based on artificial neural network with the help of grey-wolf-optimizer
2021 · Naoto Sugawara, Takeshi Fujisawa, et al. · Optical Fiber Technology · 7
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Broadband silicon four-mode multi/demultiplexer designed by a wavefront matching method
2021 · Yusuke Sawada, Takeshi Fujisawa, et al. · Optics Express · 5
Scalable Multi-Band Narrow Linewidth Operation by a Single-Chip Tunable Laser with InP/Si Heterogeneous Integration
2025 · Takuo Hiratani, Kento Komatsu, et al. · European Conference on Optical Communication · 4
Narrow-linewidth 1.55-µm-wavelength InP-based photonic-crystal surface-emitting lasers with near-diffraction-limited beam quality
2025 · Takeshi Aoki, Yuhki Itoh, et al. · Optics Express · 4
A Novel Algorithm of Wavefront-Matching Method for Stable and Efficient Design of Si Waveguides
2022 · Yusuke Sawada, Takeshi Fujisawa, et al. · IEEE Photonics Technology Letters · 4
High-power high-beam-quality 1550-nm-wavelength InP-based photonic-crystal surface-emitting laser
2025 · Takeshi Aoki, Yuhki Itoh, et al. · Novel In-Plane Semiconductor Lasers · 3
Compact passive waveguides using mosaic-based device with triangular lattice photonic crystal-like structure
2023 · Takuya Mitarai, Takeshi Fujisawa, et al. · International Conference on Solid State Devices and Materials (SSDM) · 3
Compact Power Splitters with Mosaic-based Structure Designed by Bayesian Direct-binary-search Method
2022 · Takuya Mitarai, Takeshi Fujisawa, et al. · OptoElectronics and Communications Conference and International Conference on Photonics in Switching and Computing (OECC/PSC) · 3
Comparison of Scalar and Vector WFM Method Through the Design of High-Δ Waveguide Lenses
2022 · Yusuke Sawada, Takeshi Fujisawa, et al. · IEEE Photonics Technology Letters · 3
First Experimental Demonstration of Wavefront-Matching-Method-Designed Silicon Mode Converters
2019 · Yusuke Sawada, Takeshi Fujisawa, et al. · Optical Fiber Communication Conference · 3
Ultrasmall Four-Channel Multiplexer Designed by Bayesian Direct Binary Search Method
2026 · Yusuke Sawada, Takeshi Fujisawa, et al. · IEEE Photonics Technology Letters · 2
Directly Modulated C-band High-Power Photonic-Crystal Surface-Emitting Lasers for Free-Space Optical Communications
2026 · Takeshi Aoki, Shota Ishimura, et al. · Journal of Lightwave Technology · 2
Directly Modulated $1.55 \ \mu\text{m}$-Wavelength Photonic-Crystal Surface-Emitting Lasers for Free-Space Optical Communication
2025 · Takeshi Aoki, Shota Ishimura, et al. · European Conference on Optical Communication · 2
Compact Four-Channel Wavelength Multiplexer with Two-Stage Mosaic-Based Waveguides Designed by Bayesian Direct Binary Search
2024 · Yusuke Sawada, Takeshi Fujisawa, et al. · Opto-Electronics and Communications Conference (OECC) · 2
High tolerant design of athermal Si wavelength filter using Mach–Zehnder interferometer
2024 · Takanori Sato, Kengo Maeda, et al. · Japanese Journal of Applied Physics · 2
Low-loss and fabrication-tolerant Si four-wavelength multiplexer using higher-order mode for 100/400GbE
2019 · Junya Takano, Takeshi Fujisawa, et al. · Optical Fiber Communication Conference · 2
Works count: 55
Citation count: 199
H-index: 9
I10-index: 8
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