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TypeAuthor(s)TitleOther TitlesCitationCitation(alt)Issue Date
articleFujisawa, Takeshi; Saitoh, KunimasaArbitrary higher-order optical spatial state generation by using spontaneously broken degeneracy modes in helically twisted ring-core hole assisted fibers-Optics express-22-Jun-2022
article (author version)Wang, Yizhou; Fujisawa, Takeshi; Saitoh, KunimasaAnalytical expression for mode-coupling coefficient between non-identical step-index cores and its application to multi-core fiber design within 125-mu m cladding diameter-Optics communications-1-Mar-2022
articleSaitoh, KunimasaMulti-Core Fiber Technology for SDM: Coupling Mechanisms and Design-Journal Of Lightwave Technology-25-Jan-2022
article (author version)Sugawara, Naoto; Fujisawa, Takeshi; Nakamura, Kodai; Sawada, Yusuke; Mori, Takayoshi; Sakamoto, Taiji; Imada, Ryota; Matsui, Takashi; Nakajima, Kazuhide; Saitoh, KunimasaModal amplitude and phase estimation of multimode near field patterns based on artificial neural network with the help of grey-wolf-optimizer-Optical fiber technology-Dec-2021
articleFujisawa, Takeshi; Saitoh, KunimasaArbitrary polarization and orbital angular momentum generation based on spontaneously broken degeneracy in helically twisted ring-core photonic crystal fibers-Optics express-27-Sep-2021
articleSawada, Yusuke; Fujisawa, Takeshi; Sato, Takanori; Saitoh, KunimasaBroadband silicon four-mode multi/demultiplexer designed by a wavefront matching method-Optics express-16-Aug-2021
article (author version)Fujisawa, Takeshi; Sakamoto, Taiji; Miyata, Masashi; Matsui, Takashi; Hashimoto, Toshikazu; Kasahara, Ryoichi; Mori, Takayoshi; Imada, Ryota; Nakajima, Kazuhide; Saitoh, KunimasaSix-mode scrambler based on cascaded side-wall grating waveguides-Japanese Journal of Applied Physics (JJAP)-18-May-2021
articleNakamura, Kodai; Fujisawa, Takeshi; Sato, Takanori; Saitoh, KunimasaHigh-tolerance CWDM4 wavelength multiplexer based on 2x2/2x1 MZ filters with polarization multiplexing-IEICE electronics express-25-Apr-2021
articleFujisawa, Takeshi; Saitoh, KunimasaBayesian direct-binary-search algorithm for the efficient design of mosaic-based power splitters-OSA Continuum-15-Apr-2021
article (author version)Fujisawa, Takeshi; Takano, Junya; Sawada, Yusuke; Saitoh, KunimasaLow-Loss and Small 2 x 4 lambda Multiplexers Based on 2 x 2 and 2 x 1 Mach-Zehnder Interferometers With On-Chip Polarization Multiplexing for 400GbE-Journal of lightwave technology-1-Jan-2021
articleSawada, Yusuke; Fujisawa, Takeshi; Saitoh, KunimasaBroadband and compact silicon mode converter designed using a wavefront matching method-Optics express-7-Dec-2020
articleFujisawa, Takeshi; Saitoh, KunimasaGeometric-phase-induced arbitrary polarization and orbital angular momentum generation in helically twisted birefringent photonic crystal fiber-Photonics Research-1-Aug-2020
articleShirata, Motoki; Fujisawa, Takeshi; Sakamoto, Taiji; Matsui, Takashi; Nakajima, Kazuhide; Saitoh, KunimasaDesign of small mode-dependent-loss scrambling-type mode (de) multiplexer based on PLC-Optics express-30-Mar-2020
articleFujisawa, Takeshi; Takano, Junya; Sawada, Yusuke; Sakamoto, Taiji; Matsui, Takashi; Nakajima, Kazuhide; Saitoh, KunimasaA novel Si four-wavelength multiplexer for 100/400GbE using higher-order mode composed of (a)symmetric directional couplers and TE1-TM0 mode converter-Optics express-9-Dec-2019
articleSato, Takanori; Fujisawa, Takeshi; Saitoh, KunimasaAll-Optical Diode Suppressing Broadband Backward Transmission Using Single- and Four-Port Photonic Crystal Cavities-IEEE photonics journal-Feb-2019
article (author version)Akie, Minami; Fujisawa, Takeshi; Sato, Takanori; Arai, Masakazu; Saitoh, KunimasaGeSn/SiGeSn Multiple-Quantum-Well Electroabsorption Modulator With Taper Coupler for Mid-Infrared Ge-on-Si Platform-IEEE journal of selected topics in quantum electronics-Nov-2018
articleOhta, S.; Fujisawa, T.; Makino, S.; Sakamoto, T.; Matsui, T.; Tsujikawa, K.; Nakajima, K.; Saitoh, K.Si-based Mach-Zehnder wavelength/mode multi/demultiplexer for a WDM/MDM transmission system-Optics express-11-Jun-2018
articleFujisawa, Takeshi; Amma, Yoshimichi; Sasaki, Yusuke; Matsuo, Shoichiro; Aikawa, Kazuhiko; Saitoh, Kunimasa; Koshiba, MasanoriCrosstalk Analysis of Heterogeneous Multicore Fibers Using Coupled-Mode Theory-IEEE photonics journal-Oct-2017
article (author version)Yamashita, Yoko; Makino, Shuntaro; Fujisawa, Takeshi; Hanzawa, Nobutomo; Sakamoto, Taiji; Matsui, Takashi; Tsujikawa, Kyozo; Yamamoto, Fumihiko; Nakajima, Kazuhide; Saitoh, KunimasaPLC-Based LP11 Mode Rotator With Curved Trench Structure Devised From Wavefront Matching Method-IEEE photonics technology letters-1-Jul-2017
article (author version)Fujisawa, Takeshi; Saitoh, KunimasaGroup delay spread analysis of coupled-multicore fibers : A comparison between weak and tight bending conditions-Optics communications-15-Jun-2017
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