[Japanese(日本語はこちら)]
Takanori Sato

Takanori Sato, Ph.D.

Hokkaido University
Graduate School of Information Science and Technology
Associate Professor
screenshot of E-mail address
(Laboratory's Web site)

Education

Mar. 2018Ph.D. in Engineering (Hokkaido University)
Mar. 2016Master's degree (Hokkaido University)
Mar. 2014Bachelor's degree (Hokkaido University)

Professional Experience

Apr. 2019 - Present.Associate Professor, Hokkaido University.
Apr. 2019 - Mar. 2020Assistant Professor, University of Hyogo.
Apr. 2017 - Mar. 2019Research Fellowship for Young Scientists, Hokkaido University.
Apr. 2016 - Sep. 2018Teaching Associate, Hokkai-Gakuen University.

Honors and Awards

Sep. 2018IEICE Electoronics Society, Student Encouragement Award
Mar. 2018IEICE Hokkaido, Student Encouragement Award
Mar. 2018Hokkaido University, Dean’s Award
Mar. 2016Hokkaido University, Dean’s Award
Feb. 2016IEEE Sapporo Section, Encouragement Award

Research Grants and Projects

Apr. 2019 - Mar. 2022kakenhi-logoJapan Society for the Promotion of Science: Grant-in-Aid for Early-Career Scientists (KAKENHI)
Apr. 2017 - Mar. 2019kakenhi-logoJapan Society for the Promotion of Science: Grant-in-Aid for JSPS Fellows (KAKENHI)

Research Interests

All-optical signal processing
Optoelectronics
Optical devices
Nonlinear optics
Silicon photonics
Photonic integrated circuits
Finite element method
Photonic crystal

Association Memberships

IEEE (The Institute of Electrical and Electronics Engineers)
IEEE Photonics Society
OSA (The Optical Society of America)
IEICE (The Institute of Electronics, Information and Communication Engineers)

Publications

Journal (peer-reviewed)

[] D. Furubayashi, Y. Kashiwagi, T. Sato, T. Kawai, A. Enokihara, N. Yamamoto, and T. Kawanishi, “Electro-optic modulator for compensation of third-order intermodulation distortion using frequency chirp modulation,” IEICE Transactions on Electronics, IEICE. (Accepted for publication) [Abstract is coming soon]
[] T. Sato and A. Enokihara, “Ultrasmall design of a universal linear circuit based on microring resonators,” Optics Express, OSA, vol. 27, no. 23, pp. 33005–33010, Nov. 2019. [Abstract]
[] K. Yoshida, T. Fujisawa, T. Sato, and K. Saitoh, “Optimum index profile of few-mode coupled multicore fibers for reducing the group delay spread,” Electronics Express, Optics Express, OSA, vol. 27, no. 11, pp. 16281–16295, May 2019. [Abstract]
[] Y. Sawada, T. Fujisawa, T. Sato, and K. Saitoh, “CMOS-compatible Si-wire polarization beam splitter based on wavelength-insensitive coupler,” Electronics Express, IEICE, vol. 16, no. 8, p. 20181126, Feb. 2019. [Abstract]
[] T. Sato, T. Fujisawa, and K. Saitoh, “All-optical diode suppressing broadband backward transmission using single- and four-port photonic crystal cavities,” Photonics Journal, IEEE, vol. 11, no. 1, p. 4900214, Feb. 2019. [Abstract]
[] M. Akie, T. Fujisawa, T. Sato, M. Arai, and K. Saitoh, “GeSn/SiGeSn multiple-quantum-well electroabsorption modulator with taper coupler for mid-infrared Ge-on-Si platform,” J. Sel. Top. Quantum Electron., IEEE, vol. 24, no. 6, pp. 3400208-1–3400208-8, Nov. 2018. [Abstract]
[] S. Nakano, T. Fujisawa, T. Sato, and K. Saitoh, “Beam propagation analysis of optical activity and circular dichroism in helically twisted photonic crystal fiber,” Jpn. J. Appl. Phys., vol. 57, no. 8S2, pp. 08PF06-1–08PF06-5, July 2018. [Abstract]
[] Y. Sawada, T. Sato, T. Fujisawa, and K. Saitoh, “Development of the wavefront matching method based on the 3-D finite-element method and its application to Si-wire mode converters,” J. Lightw. Technol., IEEE, vol. 37, no. 17, pp. 3652–3659, Jun. 2018. [Abstract]
[] T. Sato, T. Fujisawa, and K. Saitoh, “Design of a high-forward-transmission all-optical diode based on cascaded side-coupled photonic crystal cavities,” J. Opt. Soc. Am. B, OSA, vol. 34, no. 12, pp. 2493–2500, Dec. 2017. [Abstract]
[] K. Saitoh, T. Fujisawa, and T. Sato, “Coiling size dependence of group delay spread in coupled multicore fibers without intentional twisting,” J. Lightw. Technol., IEEE, vol. 35, no. 20, pp. 4559–4566, Oct. 2017. [Abstract]
[] T. Fujisawa, T. Sato, and K. Saitoh, “Full-Vector finite-element beam propagation method for helicoidal waveguides and its application to twisted photonic crystal fiber,” J. Lightw. Technol., IEEE, vol. 35, no. 14, pp. 2894–2901, July 2017. [Abstract]; T. Fujisawa, T. Sato, and K. Saitoh, Errata to “Full-Vector finite-element beam propagation method for helicoidal waveguides and its application to twisted photonic crystal fiber,” J. Lightw. Technol., IEEE, vol. 36, no. 18, pp. 4211–4212, Aug. 2018. [Abstract]
[] T. Fujisawa, S. Makino, T. Sato, and K. Saitoh, “Low-loss, compact, and fabrication-tolerant Si-wire 90° waveguide bend using clothoid and normal curves for large scale photonic integrated circuits,” Optics Express, OSA, vol. 25, no. 8, pp. 9150–9159, Apr. 2017. [Abstract]
[] T. Sato, S. Makino, T. Fujisawa, and K. Saitoh, “Design of a reflection-suppressed all-optical diode based on asymmetric L-shaped nonlinear photonic crystal cavity,” J. Opt. Soc. Am. B, OSA, vol. 33, no. 1, pp. 54–61, Jan. 2016. [Abstract] (author's accepted manuscript)
[] S. Makino, T. Sato, Y. Ishizaka, T. Fujisawa, and K. Saitoh, “Three-dimensional finite-element time-domain beam propagation method and its application to 1-D photonic crystal-coupled resonator optical waveguide,” J. Lightw. Technol., IEEE, vol. 33, no. 18, pp. 3836–3842, Aug. 2015. [Abstract]
[] T. Sato, S. Makino, Y. Ishizaka, T. Fujisawa, and K. Saitoh, “A rigorous definition of nonlinear parameter γ and effective area Aeff for photonic crystal optical waveguides,” J. Opt. Soc. Am. B, OSA, vol. 32, no. 6, pp. 1245–1251, Jun. 2015. [Abstract] (author's accepted manuscript)
[] T. Sato, S. Makino, Y. Ishizaka, T. Fujisawa, and K. Saitoh, “Three-dimensional finite-element mode-solver for nonlinear periodic optical waveguides and its application to photonic crystal waveguides,” J. Lightw. Technol., IEEE, vol. 32, no. 21, pp. 4011–4019, Nov. 2014. [Abstract]

Conference proceedings (peer-reviewed)

[] K. Nakamura, T. Sato, T. Fujisawa, and K. Saitoh, “Nonreciprocity enhancement of graphene-on-Si waveguide using one-dimensional photonic crystal,” The 24th Microoptics Conference (MOC 2019), Paper P-48, Toyama, Japan, Nov. 17-20, 2019. [Abstract]
[] T. Sato, T. Fujisawa, and K. Saitoh, “Ultra-robust design of mode (de)multiplexer based on asymmetrical directional coupler using wire and one-side rib waveguides,” 24th Optoelectronics and Communications Conference / International Conference on Photonics in Switching and Computing 2019 (OECC/PSC 2019), Paper. TuE2-3, Fukuoka, Japan, July 7-11, 2019. [Abstract]
[] K. Nishimura, T. Sato, T. Fujisawa, Y. Amma, K. Takenaga, K. Aikawa, and K. Saitoh, “Cladding diameter dependence of inter-core crosstalk in heterogeneous multicore fibers,” 24th Optoelectronics and Communications Conference / International Conference on Photonics in Switching and Computing 2019 (OECC/PSC 2019), Paper. ThG3-2, Fukuoka, Japan, July 7-11, 2019. [Abstract]
[] Y. Yasui, K. Yoshida, T. Sato, T. Fujisawa, T. Sakamoto, T. Matsui, K. Tsujikawa, K. Nakajima, and K. Saitoh, “Simple GDS estimation method for coupled multicore fibers with various core layouts,” International Symposium on Extremely Advanced Transmission Technologies (EXAT 2019), Paper P-19, Ise, Japan, May 29-31, 2019. [Abstract]
[] Y. Sawada, T. Fujisawa, T. Sato, and K. Saitoh, “First experimental demonstration of wavefront-matching-method-designed silicon mode converters,” Optical Fiber Communication Conference (OFC), Paper W3B.4, San Diego, USA, Mar. 3-7, 2019. [Abstract]
[] J. Takano, T. Fujisawa, T. Sato, Y. Sawada, T. Sakamoto, T. Matsui, K. Tsujikawa, K. Nakajima, and K. Saitoh, “Low-loss and fabrication-tolerant Si four-wavelength multiplexer using higher-order mode for 100/400GbE,” Optical Fiber Communication Conference (OFC), Paper Tu2J.2, San Diego, USA, Mar. 3-7, 2019. [Abstract]
[] T. Sato, K. Yoshida, T. Fujisawa, T. Sakamoto, T. Matsui, K. Tsujikawa, K. Nakajima, and K. Saitoh, “Suppression of group-delay spread in coupled two-LP-mode four-core fiber,” IEEE Photonics Conference (IPC 2018), Paper MA4.2, Reston, USA, Sept. 30-Oct. 4, 2018. [Abstract]
[] T. Sato, T. Fujisawa, and K. Saitoh, “Novel all-optical diode based on single-port and four-port photonic crystal cavities,” OptoElectronics and Communications Conference (OECC 2018), Paper 4D2-2, Jeju, Korea, July 2-6, 2018. [Abstract]
[] J. Takano, T. Sato, Y. Sawada, T. Fujisawa, T. Sakamoto, T. Matsui, K. Tsujikawa, K. Nakajima, and K. Saitoh, “Proposal of Si four-wavelength multiplexer using higher-order mode for 100GbE,” OptoElectronics and Communications Conference (OECC 2018), Paper 4E2-4, Jeju, Korea, July 2-6, 2018. [Abstract]
[] Y. Sawada, T. Sato, T. Fujisawa, and K. Saitoh, “A broadband silicon two-mode multiplexer designed by wavefront matching method,” OptoElectronics and Communications Conference (OECC 2018), Paper 5E4-4, Jeju, Korea, July 2-6, 2018. [Abstract]
[] S. Nakano, T. Fujisawa, T. Sato, and K. Saitoh, “Beam propagation analysis of optical activity and circular dichroism in helically twisted photonic crystal fiber,” The 22nd Microoptics Conference (MOC 2017), Paper P-16, Tokyo, Japan, Nov. 19-22, 2017. [Abstract]
[] K. Yoshida, T. Fujisawa, T. Sato, and K. Saitoh, “Group delay spread analysis of few-mode, coupled 3-core fibres: Optimum index profile and maximum transmission distance for strong coupling regime,” European Conference on Optical Communications (ECOC 2017), Paper P1.SC1.8, Gothenburg, Sweden, Sept. 17-21, 2017. [Abstract]
[] T. Sato, T. Fujisawa, and K. Saitoh, “High-forward-transmission all-optical diode based on cascaded L3 photonic crystal cavities,” The 24th Congress of International Commission for Optics (ICO-24), Paper Th3E-03, Tokyo, Japan, Aug. 21-25, 2017. [Online abstract is unavalilable]
[] K. Saitoh, T. Fujisawa, and T. Sato, “Design and analysis of weakly- and strongly-coupled multicore fibers,” Photonic Networks and Devices in Proceedings Advanced Photonics 2017 (IPR, NOMA, Sensors, Networks, SPPCom, PS), Paper NeTu2B.5, New Orleans, USA, Jul. 24-27, 2017. [Abstract]
[] M. Akie, T. Sato, M. Arai, T. Fujisawa, and K. Saitoh, “A compact and low-loss GeSn electroabsorption modulator using vertical multimode interference for mid-infrared Ge-on-Si platform,” 2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR 2017), Singapore, Jul. 31-Aug. 4, 2017. [Abstract]
[] T. Sato, M. Akie, M. Arai, T. Fujisawa, and K. Saitoh, “Highly efficient GeSn electroabsorprtion modulator using higher-order-mode for mid-infrared Ge-on-Si platform,” Conference on Lasers and Electro-Optics (CLEO 2017), Paper JW2A.110, San Jose, USA, May 14-19, 2017. [Abstract]
[] S. Makino, M. Suga, T. Sato, T. Fujisawa, and K. Saitoh, “Ultimately low-loss and compact Si wire 90° waveguide bend composed of clothoid and normal curves for dense optical interconnect PICs,” Optical Fiber Communication Conference (OFC 2017), Paper Th3E.2, Los Angeles, USA, Mar. 19-23, 2017. [Abstract]
[] T. Sato, S. Makino, T. Fujisawa, and K. Saitoh, “A simple design method of reflection-suppressed photonic crystal cavity with asymmetric waveguides,” IEEE Photonics Conference (IPC 2016), pp. 91–92, Hawaii, USA, Oct. 2-6, 2016. [Abstract]
[] T. Sato, S. Makino, Y. Ishizaka, and K. Saitoh, “Investigation of nonlinear characteristics in a 1-D slotted photonic crystal coupled resonator optical waveguide with modulated mode-gap,” in Optical Fibre Technology, 2014 OptoElectronics and Communication Conference and Australian Conference on (OECC/ACOFT 2014), pp. 673–675, Melbourne, Australia, Jul. 6-10, 2014. [Abstract]