M. Kohtoku

1.7k total citations
90 papers, 1.3k citations indexed

About

M. Kohtoku is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Surfaces, Coatings and Films. According to data from OpenAlex, M. Kohtoku has authored 90 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 87 papers in Electrical and Electronic Engineering, 23 papers in Atomic and Molecular Physics, and Optics and 8 papers in Surfaces, Coatings and Films. Recurrent topics in M. Kohtoku's work include Photonic and Optical Devices (80 papers), Semiconductor Lasers and Optical Devices (46 papers) and Advanced Photonic Communication Systems (28 papers). M. Kohtoku is often cited by papers focused on Photonic and Optical Devices (80 papers), Semiconductor Lasers and Optical Devices (46 papers) and Advanced Photonic Communication Systems (28 papers). M. Kohtoku collaborates with scholars based in Japan, Thailand and United States. M. Kohtoku's co-authors include Yusuke Nasu, Yoshinori Hibino, Y. Shibata, S. Oku, Y. Yoshikuni, Hiroaki Sanjoh, Y. Kadota, Kenji Kawano, Yuta Ueda and Takeshi Fujisawa and has published in prestigious journals such as Optics Letters, Optics Express and Japanese Journal of Applied Physics.

In The Last Decade

M. Kohtoku

88 papers receiving 1.1k citations

Peers

Countries citing papers authored by M. Kohtoku

Since Specialization

Citations

This map shows the geographic impact of M. Kohtoku's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by M. Kohtoku with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites M. Kohtoku more than expected).

Fields of papers citing papers by M. Kohtoku

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by M. Kohtoku. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by M. Kohtoku. The network helps show where M. Kohtoku may publish in the future.

Co-authorship network of co-authors of M. Kohtoku

This figure shows the co-authorship network connecting the top 25 collaborators of M. Kohtoku. A scholar is included among the top collaborators of M. Kohtoku based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with M. Kohtoku. M. Kohtoku is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Low Driving Voltage Operation of MZI-Type EA Modulator Integrated With DFB Laser Using Optical Absorption and Interferometric Extinction 2015 ·IEEE Journal of Selected Topics in Quantum Electronics ·Yuta Ueda, Takeshi Fujisawa, Shigeru Kanazawa, Wataru Kobayashi, Kiyoto Takahata, Hiroaki Sanjoh, Hiroyuki Ishii, M. Kohtoku	8
2	Highly Sensitive Laser Based Trace-gas Sensor Technology and Its Application to Stable Isotope Ratio Analysis 2014 ·NTT technical review ·R. Yoshimura, M. Kohtoku, Koji Fujii, Tadashi Sakamoto, (unknown)	5
3	50-Gb/s Direct Modulation of a 1.3-μm InGaAlAs-Based DFB Laser With a Ridge Waveguide Structure 2013 ·IEEE Journal of Selected Topics in Quantum Electronics ·Wataru Kobayashi, Tsuyoshi Ito, T. Yamanaka, Takeshi Fujisawa, Y. Shibata, T. Kurosaki, M. Kohtoku, Takashi Tadokoro, Hiroaki Sanjoh	95
4	Demonstration of High Temperature Operation in 1.3-µm-Range Metamorphic InGaAs Laser 2012 ·(unknown), Yasuhiro Kondo, Shigeru Kanazawa, Takashi Tadokoro, M. Kohtoku	2
5	50-GHz-Spacing Athermal Mach–Zehnder Interferometer-Synchronized Arrayed-Waveguide Grating With Improved Temperature Insensitivity 2009 ·IEEE Photonics Technology Letters ·S. Kamei, T. Kitoh, Mikitaka Itoh, Tomohiro Shibata, M. Kohtoku	6
6	Port Scalable PLC-Based Wavelength Selective Switch with Low Extension Loss for Multi-Degree ROADM/WXC 2008 ·Takashi Goh, T. Kitoh, M. Kohtoku, (unknown), Takayuki Mizuno, Akimasa Kaneko	10
7	Developments in laser processing for silica-based planar lightwave circuits 2006 ·Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE ·Yusuke Nasu, Masahiro Abe, M. Kohtoku	1
8	Low-loss waveguides written with a femtosecond laser for flexible interconnection in a planar light-wave circuit 2005 ·Optics Letters ·Yusuke Nasu, M. Kohtoku, Yoshinori Hibino	153
9	Optical circuit design based on a wavefront-matching method 2005 ·Optics Letters ·Toshikazu Hashimoto, Takashi Saida, I. Ogawa, M. Kohtoku, Tomohiro Shibata, Hiroshi Takahashi	55
10	Fabrication of wavelength splitter designed by wavefront matching method 2005 ·OFC/NFOEC Technical Digest. Optical Fiber Communication Conference, 2005. ·Takashi Saida, Toshikazu Hashimoto, I. Ogawa, M. Kohtoku, Tomohiro Shibata, Hiroshi Takahashi, S. Suzuki	5
11	Low-loss athermal silica-based lattice-form interleave filter with silicone-filled grooves 2005 ·IEEE Photonics Technology Letters ·S. Kamei, M. Oguma, M. Kohtoku, T. Shibata, Yoshiyuki Inoue	11
12	New Waveguide Fabrication Techniques for Next-generation PLCs 2005 ·M. Kohtoku, T. Kominato, Yusuke Nasu, Tomohiro Shibata	7
13	Birefringence and path length adjustment of silica-based waveguide using permanent heater trimming 2004 ·Electronics Letters ·Takayuki Mizuno, M. Kohtoku, M. Oguma, Y. Hida, Yoshiyuki Inoue	5
14	Low Loss and Low Crosstalk PLC-based Interleave Filter Fabricated with Automatic Phase Trimming Method 2002 ·European Conference on Optical Communication ·M. Kohtoku, Takayuki Mizuno, T. Kitoh, M. Oguma, T. Shibata, (unknown), Y. Hibino	5
15	Evaluation of the rejection ratio of an MMI-based higher order mode filter using optical low-coherence reflectometry 2002 ·IEEE Photonics Technology Letters ·M. Kohtoku, Y. Shibata, Y. Yoshikuni	7
16	Monolithically integrated WDM channel selectors on InP substrates 2002 ·Hiroyuki Ishii, Hiroaki Sanjoh, M. Kohtoku, S. Oku, Y. Kadota, Y. Yoshikuni, Yasuhiro Kondo, Kenji Kishi	14
17	Polarisation-insensitive semiconductor arrayedwaveguide gratingintegrated with spotsize converter 2000 ·Electronics Letters ·M. Kohtoku, S. Oku, Y. Kadota, Yoshitaka Shibata, Y. Yoshikuni	6
18	Polarization Independent Semiconductor Arrayed Waveguide Gratings Using a Deep-Ridge Waveguide Structure 1998 ·IEICE Transactions on Electronics ·M. Kohtoku, Hiroaki Sanjoh, S. Oku, (unknown), (unknown)	15
19	Packaged polarization-insensitive WDM monitor with low loss (7.3 dB) and wide tuning range (4.5 nm) 1998 ·IEEE Photonics Technology Letters ·M. Kohtoku, Hiroaki Sanjoh, S. Oku, Y. Kadota, Y. Yoshikuni	16
20	Switching operation in a GaInAs-InP MQW integrated-twin-guide (ITG) optical switch 1991 ·IEEE Photonics Technology Letters ·M. Kohtoku, Satoshi Baba, Shigehisa Arai, Y. Suematsu	16

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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