naoya_kuse/published_papers/53950632 Sota Sakaue Naoya Kuse Coupled Lugiato–Lefever equation analysis of bright soliton microcombs in photonic-crystal ring resonators We present a theoretical framework for bright soliton microcombs in photonic-crystal ring resonators based on coupled Lugiato–Lefever equations that resolve forward- and backward-propagating fields. By analyzing continuous-wave steady states, we show that mode splitting reshapes the resonance structure and fundamentally alters the origin of modulation instability (MI), allowing it to be dominated by the pumped mode rather than finite-frequency sidebands. This mechanism explains direct comb initiation and spontaneous formation of blue-detuned solitons. Using effective parameters linked to the underlying field coupling, we further estimate the soliton existence range and show that soliton states can persist even when they are not dynamically accessible through conventional pump scanning. Optica Publishing Group Optics Express 1094-4087 34 12 22095 22095 20260608 10.1364/oe.599771 naoya_kuse/published_papers/54135424 Yu Tokizane Hiroki Kishikawa Takumi Kikuhara Miezel Talara Yoshihiro Makimoto Kodai Yamaji Yasuhiro Okamura Kenji Nishimoto Eiji Hase Isao Morohashi Atsushi Kanno Shintaro Hisatake Naoya Kuse Tadao Nagatsuma Takeshi Yasui Beyond 350 GHz: Single-channel 112 Gbps photonic wireless transmission at 560 GHz using soliton microcombs Abstract Sixth-generation (6 G) back-haul links will require terahertz (THz) carriers above 350 GHz to escape the congested 300 GHz band and support &gt;100 Gbps data rates. Photonic THz transmitters have so far remained below 350 GHz because high-frequency photomixing suffers from phase noise and power limits. Here we demonstrate single-channel wireless transmission at 560 GHz using a fibre-packaged silicon-nitride soliton microcomb as a compact, low-phase-noise optical reference. A high numerical aperture, UV-bonded fibre interface sustains soliton operation for more than 24 hours with 1 W pump power. We phase-lock two distributed-feedback lasers (DFBs) to adjacent comb lines and photomix them in a uni-traveling-carrier photodiode, generating a 560 GHz carrier that bears in-phase and quadrature modulation. We achieve hard-decision forward-error-correction-qualified quadrature phase-shift keying and 16-quadrature amplitude modulation (16QAM) transmissions at 42 and 28 GBaud, respectively, attaining a record 112 Gbps data rate at 560 GHz. Relative to free-running DFBs, microcomb-locked photomixing cuts carrier linewidth and improves 16QAM error-vector magnitude. The results establish soliton microcombs as compact and scalable frequency references for &gt;100 Gbps sub-THz links and chart a path toward compact 6 G back-haul radios. Springer Science and Business Media LLC Communications Engineering 2731-3395 5 1 null null 20260518 10.1038/s44172-026-00659-8 naoya_kuse/published_papers/52099132 Yudai Matsumura Hiroki Kishikawa Naoya Kuse Yasuhiro Okamura Eiji Hase Jun-Ichi Fujikata Masanobu Haraguchi Takahiro Kaji Akira Otomo Isao Morohashi Tomohiro Tetsumoto Shintaro Hisatake Atsushi Kanno Yu Tokizane Takeshi Yasui All-photonic W-band terahertz receiver based on THz-to-optical carrier conversion with soliton microcomb dual carriers for high-speed OOK wireless transmission We demonstrate an all-photonic terahertz (THz) receiver for a data-modulated signal, targeting a 106-GHz, 2.97-Gb/s on-off keying (OOK) link. The scheme employs dual-wavelength optical carriers referenced to a soliton microcomb and performs THz-to-optical carrier conversion via nonpolarimetric electro-optic downconversion using an electro-optic polymer modulator. RF spectra and eye diagrams confirmed error-free transmission with a Q-factor of 5.78 and a bit-error rate of 3.74 × 10 ^-9 , well below the hard-decision forward-error-correction threshold (Q-factor = 2.67, (BER) = 3.8 × 10 ^-3 ). Comparative measurements using a single-wavelength optical-carrier configuration clearly revealed the superior signal-to-noise performance of the dual-wavelength scheme. System-level modeling further indicated the scalability of the transmission distance beyond 100 m. These results establish soliton microcomb-referenced dual carriers as a promising platform for compact, integrated receivers enabling seamless wireless-optical convergence in future 6G networks. Optica Publishing Group Optics Express 1094-4087 34 2 3355 3355 20260123 10.1364/oe.582936 naoya_kuse/published_papers/51886726 Kenji Nishimoto Kaoru Minoshima Naoya Kuse Self-cooling, blue-detuned dissipative Kerr microresonator soliton comb Dissipative Kerr solitons (DKSs) generated in high-Q microresonators driven by continuous-wave (CW) lasers provide chip-scale optical frequency combs composed of mutually coherent CW lines. However, their small mode volume makes them highly susceptible to thermal fluctuations, and the resulting thermo-refractive noise perturbs the repetition rate, frep. Here, we experimentally demonstrate a ``blue-detuned'' DKS in a coupled-ring microresonator. By employing avoided-mode-crossing-induced dispersion engineering at the pump mode, DKSs are generated even when the pump laser is tuned to the higher-frequency (blue) side of the resonance. In this regime, the pump laser not only seeds DKS formation but also serves as a cooling laser for the thermally sensitive pumped mode. We observe a self-cooling effect that reduces the phase noise of frep by up to 14.5 dB, while achieving a pump-to-comb conversion efficiency as high as 37%. These results establish blue-detuned DKSs as a thermally robust and power-efficient solution for integrated microcomb systems, eliminating the need for auxiliary lasers. AIP Publishing APL Photonics 2378-0967 10 12 126119 null 20251218 10.1063/5.0294122 naoya_kuse/published_papers/51979788 Miezel Talara Yu Tokizane Kodai Yamaji Yudai Matsumura Yoshihiro Makimoto Kenji Nishimoto Masayuki Higaki Naoya Kuse Takeshi Yasui Direct fiber-coupled soliton microcomb system with enhanced stability and reproducibility via high numerical-aperture polarization-maintaining single-mode fibers and temperature control We propose a relatively simple and robust system architecture for soliton microcomb generation, based on two key techniques: direct fiber coupling using high numerical-aperture polarization-maintaining single-mode fibers (high-NA PMFs) and active temperature control of the microresonator. These complementary strategies address two major challenges in microcomb implementation: environmental sensitivity and resonance instability. Building on prior work using single-mode fiber (SMF)-based direct coupling, which demonstrated device miniaturization and partial suppression of thermal drift in total fiber-to-fiber insertion loss, our PMF-based approach offers enhanced thermal stability and significantly greater robustness to environmental disturbances such as temperature fluctuations and vibration. In our system, the need for precision alignment using microscopes or multi-axis stages is alleviated, enabling a less complex optical setup and stable long-term operation. The direct coupling scheme achieved a total fiber-to-fiber insertion loss of 2.39 dB and maintained stable soliton operation for over 24 hours under external perturbations. In parallel, active temperature control of the microresonator was quantitatively evaluated, reducing the wavelength variation of the pump and auxiliary lasers by 79% and 97%, respectively. This stability enables reproducible soliton generation even in thermally dynamic environments. Comparative experiments with SMF-based direct coupling and lensed-SMF-based free-space coupling systems confirmed the superior performance of the PMF-based design in terms of coupling stability, soliton lifetime, and immunity to environmental noise. The architecture developed in this study lays a strong foundation for future integration into compact modules, with ongoing efforts aimed at reducing the reliance on laboratory-scale laser systems and optical components. Optica Publishing Group Optics Continuum 2770-0208 4 11 2772 2772 20251114 10.1364/optcon.581058 naoya_kuse/published_papers/51166960 Jonathan Cuevas Yue Hu Baoqi Shi Junqiu Liu Kaoru Minoshima Naoya Kuse Frequency-multiplexed optical reservoir computing using a microcomb Abstract Optical reservoir computing (ORC) promises fast, energy-efficient temporal inference by harnessing the rich transient dynamics of photonic systems. Yet most ORC demonstrations still depend on fiber delay lines or camera-based spatial multiplexing, which caps the clock rate at a few tens of MSa/s and complicates monolithic integration. Here we introduce a frequency-multiplexed ORC whose nodes are the individual modes of a dissipative Kerr-soliton microcomb generated in a high-Q Si<sub>3</sub>N<sub>4</sub> microresonator. The input signal is encoded as a rapid detuning modulation of the pump laser, so the intracavity dynamics of the microcomb provide both the high-dimensional nonlinear mapping and tens of nanoseconds of memory, while output weighting is realized optically with standard microring arrays. Numerical modeling with 60 comb modes provides a normalized mean-square error (NMSE) of 0.015 on the Santa Fe chaotic time-series task at 50 MSa/s and more than a tenfold reduction in symbol-error rate for nonlinear equalization (NLEQ) at 100 MSa/s. A proof-of-concept experiment using 37 measured modes also confirms the concept on the Santa Fe chaotic time-series and NLEQ benchmarks. Because both the microcomb and weighting network are fabricated by a complementary metal-oxide semiconductor (CMOS)-compatible process, the architecture offers a clear path toward compact, energy-efficient photonic processors operating at greater than 1 GSa/s, directly addressing the scalability and speed challenges of nanophotonic ORC. Walter de Gruyter GmbH Nanophotonics 2192-8614 14 18 3063 3073 20250829 10.1515/nanoph-2025-0260 naoya_kuse/published_papers/50239893 Daichi Hitotsumatsu Kaoru Minoshima Naoya Kuse Photonic extreme learning machine based on phase-sensitive optical-time-domain reflectometry of Rayleigh scattering from a long fiber Photonic extreme learning machines (ELMs) offer rapid training, low power consumption, and inherent parallelism compared to conventional electronic systems. Time-domain photonic ELMs employing Rayleigh backscattering in an optical fiber for high-dimensional mapping enable simplified architectures and ultrafast processing. In this work, we introduce a novel phase-sensitive optical-time-domain reflectometry method that encodes input data in pulse phase and employs heterodyne detection to eliminate the need for optical amplification of the Rayleigh backscattered signal. In the proof-of-concept experiments, we showcase competitive classification accuracies of 94.93% and 91.56% on the Iris and Vowel datasets, respectively, highlighting the effectiveness and practical advantages of our approach. Optica Publishing Group Optics Letters 1539-4794 50 11 3485 3485 20250516 10.1364/ol.561867 naoya_kuse/published_papers/48808722 Omnia Nawwar Kaoru Minoshima Naoya Kuse Parametric Study of Chaotic Combs for High-Rate Random Number Generation Institute of Electrical and Electronics Engineers (IEEE) IEEE Photonics Technology Letters 1941-0174 37 3 153 156 20241225 10.1109/lpt.2024.3522239 naoya_kuse/published_papers/46539583 Omnia Nawwar Kaoru Minoshima Naoya Kuse Stepped-Frequency THz-Wave Signal Generation From a Kerr Microresonator Soliton Comb Institute of Electrical and Electronics Engineers (IEEE) Journal of Lightwave Technology 1558-2213 42 7 2260 2266 20240401 10.1109/jlt.2023.3336991 naoya_kuse/published_papers/45876456 Jonathan Cuevas Ryugo Iwami Atsushi Uchida Kaoru Minoshima Naoya Kuse Solving multi-armed bandit problems using a chaotic microresonator comb The Multi-Armed Bandit (MAB) problem, foundational to reinforcement learning-based decision-making, addresses the challenge of maximizing rewards amid multiple uncertain choices. While algorithmic solutions are effective, their computational efficiency diminishes with increasing problem complexity. Photonic accelerators, leveraging temporal and spatial-temporal chaos, have emerged as promising alternatives. However, despite these advancements, current approaches either compromise computation speed or amplify system complexity. In this paper, we introduce a chaotic microresonator frequency comb (chaotic comb) to tackle the MAB problem, where each comb mode is assigned to a slot machine. Through a proof-of-concept experiment, we employ 44 comb modes to address an MAB with 44 slot machines, demonstrating performance competitive with both conventional software algorithms and other photonic methods. Furthermore, the scalability of decision making is explored with up to 512 slot machines using experimentally obtained temporal chaos in different time slots. Power-law scalability is achieved with an exponent of 0.96, outperforming conventional software-based algorithms. Moreover, we find that a numerically calculated chaotic comb accurately reproduces experimental results, paving the way for discussions on strategies to increase the number of slot machines. AIP Publishing APL Photonics 2378-0967 9 3 null null 20240301 10.1063/5.0173287 naoya_kuse/published_papers/45524614 Yu Tokizane Shota Okada Takumi Kikuhara Hiroki Kishikawa Yasuhiro Okamura Yoshihiro Makimoto Kenji Nishimoto Takeo Minamikawa Eiji Hase Jun-Ichi Fujikata Masanobu Haraguchi Atsushi Kanno Shintaro Hisatake Naoya Kuse Takeshi Yasui Wireless data transmission in the 560-GHz band utilizing terahertz wave generated through photomixing of a pair of distributed feedback lasers injection-locking to a Kerr micro-resonator soliton comb The increasing demand for higher data rates in 6G mobile wireless systems has sparked a keen interest in terahertz (THz) waves as a high-frequency, high-bandwidth carrier. This study presents a novel approach to wireless data transmission at 560 GHz, leveraging the use of THz waves generated through the injection-locking of a pair of distributed feedback lasers into a Kerr micro-resonator soliton comb. Experimental results demonstrate a Q-factor of 6.23 in 1-Gbit/s on-off-keying data transmission, which closely approaches the error-free limit represented by a Q-factor of 6.36. Additionally, the study achieves low error vector magnitudes for various modulation formats: 23.9% for 1-GBaud binary-phase-shift-keying, 23.6% for 1-GBaud quadrature-phase-shift-keying, and 8.07% for 0.1-GBaud 16-quadrature-amplitude modulation. This innovative approach holds promise for achieving high-quality, high-speed wireless data transmission, thereby advancing THz communication technology for integration into 6G systems. Optica Publishing Group Optics Continuum 2770-0208 3 1 1 1 20231218 10.1364/optcon.504431 naoya_kuse/published_papers/54083995 Takeshi Yasui Naoya Kuse Next-generation mobile communication leveraging cutting-edge photonic technologies (Photonic 6G) <jats:sec> <jats:title>Next-generation mobile communication leveraging cutting-edge photonic technologies (Photonic 6G)</jats:title> <jats:p>Our aim is to develop `Photonic 6G', an all-photonic THz communication technology, by integrating advanced photonic methods. This includes generating low-phase-noise THz waves with microcombs and converting modulated THz waves into optical carrier signals. By leveraging these advancements, we aim to enable advanced modulation and multiplexing in the optical domain, ultimately achieving the integration for photonic 6G.</jats:p> </jats:sec> European Dissemination Media Agency Limited The Project Repository Journal 2632-4067 18 78 82 20231123 10.54050/prj1820760 1873679867250356480 naoya_kuse/published_papers/43850452 Yudai Matsumura Yu Tokizane Eiji Hase Naoya Kuse Takeo Minamikawa Jun-Ichi Fujikata Hiroki Kishikawa Masanobu Haraguchi Yasuhiro Okamura Takahiro Kaji Akira Otomo Isao Morohashi Atsushi Kanno Shintaro Hisatake Takeshi Yasui Carrier conversion from terahertz wave to dual-wavelength near-infrared light for photonic terahertz detection in wireless communication. THz waves are promising wireless carriers for next-generation wireless communications, where a seamless connection from wireless to optical communication is required. In this study, we demonstrate carrier conversion from THz waves to dual-wavelength NIR light injection-locking to an optical frequency comb using asynchronous nonpolarimetric electro-optic downconversion with an electro-optic polymer modulator. THz wave in the W band was detected as a stable photonic RF beat signal of 1 GHz with a signal-to-noise ratio of 20 dB via the proposed THz-to-NIR carrier conversion. In addition, the results imply the potential of the photonic detection of THz waves for wireless-to-optical seamless communication. Optics express 31 20 33103 33112 20230925 10.1364/OE.499472 37859097 naoya_kuse/published_papers/42553709 Yu Tokizane Shota Okada Kenji Nishimoto Yasuhiro Okamura Hiroki Kishikawa Takeo Minamikawa Eiji Hase Jun-ichi Fujikata Masanobu Haraguchi Atsushi Kanno Shintaro Hisatake Naoya Kuse Takeshi Yasui Terahertz wireless communication in a 560-GHz band using a Kerr micro-resonator soliton comb Optics Continuum 2578-7519 2 5 1267 1275 20230515 10.1364/OPTCON.491729 2-s2.0-85168640223 naoya_kuse/published_papers/40621599 Naoya Kuse Kenji Nishimoto Yu Tokizane Shota Okada Gabriele Navickaite Michael Geiselmann Kaoru Minoshima Takeshi Yasui Low phase noise THz generation from a fiber-referenced Kerr microresonator soliton comb Abstract THz oscillators generated via frequency-multiplication of microwaves are facing difficulty in achieving low phase noise. Photonics-based techniques, in which optical two tones are translated to a THz wave through opto-electronic conversion, are promising if the relative phase noise between the two tones is well suppressed. Here, a THz (≈560 GHz) wave with a low phase noise is provided by a frequency-stabilized, dissipative Kerr microresonator soliton comb. The repetition frequency of the comb is stabilized to a long fiber in a two-wavelength delayed self-heterodyne interferometer, significantly reducing the phase noise of the THz wave. A measurement technique to characterize the phase noise of the THz wave beyond the limit of a frequency-multiplied microwave is also demonstrated, showing the superior phase noise of the THz wave to any other photonic THz oscillators (&gt;300 GHz). Springer Science and Business Media LLC Communications Physics 2399-3650 5 1 null null 20221202 10.1038/s42005-022-01100-0 naoya_kuse/published_papers/40772939 Naoya Kuse Emerging applications with microresonator optical frequency combs Photonics Review 2022 220201 null 20221200 10.11470/photo.220201 naoya_kuse/published_papers/36219233 Kenji Nishimoto Kaoru Minoshima Takeshi Yasui Naoya Kuse Thermal control of a Kerr microresonator soliton comb via an optical sideband We report the thermal control of a dissipative Kerr microresonator soliton comb via an optical sideband generated from an electro-optic modulator. Same as the previous reports using an independent auxiliary laser, our sideband-based (S-B) auxiliary light also enables access to a stable soliton comb and reduces the phase noise of the soliton comb, greatly simplifying the set-up with an auxiliary laser. More importantly, because of the intrinsically high frequency/phase correlation between the pump and S-B auxiliary light, the detuning between the pump and resonance frequency is automatically almost fixed, which allows an 18 times larger ``effective" soliton existence range than the conventional method using an independent auxiliary laser, as well as a scanning of the soliton comb of more than 10 GHz without using microheaters. The Optical Society Optics Letters 1539-4794 47 2 281 284 20220115 10.1364/ol.448326 naoya_kuse/published_papers/36219232 Naoya Kuse Kaoru Minoshima Amplification and phase noise transfer of a Kerr microresonator soliton comb for low phase noise THz generation with a high signal-to-noise ratio The Optical Society Optics Express 1094-4087 30 1 318 325 20211215 10.1364/oe.446903 naoya_kuse/published_papers/33125275 Naoya Kuse Gabriele Navickaite Michael Geiselmann Takeshi Yasui Kaoru Minoshima Frequency-scanned microresonator soliton comb with tracking of the frequency of all comb modes The Optical Society Optics Letters 1539-4794 46 14 3400 3400 20210715 10.1364/ol.426841 naoya_kuse/published_papers/31201602 Kenji Nishimoto Kaoru Minoshima Takeshi Yasui Naoya Kuse Generation of a microresonator soliton comb via current modulation of a DFB laser The Optical Society OSA Continuum 2578-7519 3 11 3218 3218 20201115 10.1364/osac.409885 naoya_kuse/published_papers/33125289 L. Yi K. Iwamoto T. Yamamoto F. Ayano A. Rolland N. Kuse M. Fermann Y. Li T. Nagatsuma 300-GHz-band wireless communication using a low phase noise photonic source <title>Abstract</title>The implementation of advanced multi-level modulation schemes such as quadrature phase-shift keying (QPSK) in contrast to the conventional on–off keying is crucial to further boost the terahertz (THz) communications speed. Thereby, carrier phase noise reduction in the THz range is one of the key goals that need to be urgently achieved. In this paper, the photonic-based THz sources and the phase noise problem are briefly summarized. Then, a low phase-noise photonic source based on the stimulated Brillouin scattering (SBS) optical fiber cavity is first applied for a 300-GHz-band QPSK wireless communication link. The highest data rate at forward-error-correction limited condition was 15 Gbaud utilizing the SBS-based photonic source with a small transmit power of ~ -36 dBm. Its transmission characteristics are evaluated and compared with the conventional optical frequency comb generator (OFCG)-based source at 5 Gbaud. The proposed SBS-based photonic source has been proven to offer better performances than the OFCG-based source with respect to the phase noise, optical carrier to noise ratio, and bit error rate in communications. Cambridge University Press (CUP) International Journal of Microwave and Wireless Technologies 1759-0795 12 7 551 558 20200900 10.1017/s175907872000029x naoya_kuse/published_papers/28431209 Kenji Nishimoto Kaoru Minoshima Takeshi Yasui Naoya Kuse Investigation of the phase noise of a microresonator soliton comb The Optical Society Optics Express 1094-4087 28 13 19295 19295 20200622 10.1364/oe.395436 naoya_kuse/published_papers/24566488 Naoya Kuse, Tomohiro Tetsumoto, Gabriele Navickaite, Michael Geiselmann, and Martin E. Fermann Continuous scanning of a dissipative Kerr-microresonator soliton comb for broadband, high-resolution spectroscopy Optics Letters 1539-4794 45 4 927 930 20200200 10.1364/OL.383036 32058508 2-s2.0-85079361743 naoya_kuse/published_papers/3131849 Naoya Kuse Martin E. Fermann Frequency-modulated comb LIDAR APL Photonics 4 106105 null 20191000 naoya_kuse/published_papers/22293157 Naoya Kuse Travis C. Briles Scott B. Papp Martin E. Fermannn Control of Kerr-microresonator optical frequency comb by a dual-parallel Mach-Zehnder interferometer Optics Express 27 4 3873 3883 20190200 naoya_kuse/published_papers/22293162 Yihan Li Antoine Rolland Kenta Iwamoto Naoya Kuse Martin E. Fermannn Tadao Nagatsuma Low-noise millimeter-wave synthesis from a dual-wavelength fiber Brillouin cavity Optics Letters 44 2 359 362 20190100 naoya_kuse/published_papers/22293161 Naoya Kuse Martin E. Fermannn A photonic frequency discriminator based on a two wavelength delayed self-heterodyne interferometer for low phase noise tunable micro/mm wave synthesis Scientific Reports 8 13719 null 20180900 naoya_kuse/published_papers/22293217 Antoine Rolland Peng Lin Naoya Kuse Marco Cassinerio Carsten Langrock Martin E. Fermannn Ultra-broadband dual-branch optical frequency comb with 10-18 instability Optica 5 9 1070 1077 20180800 naoya_kuse/published_papers/22293220 Yihan Li Naoya Kuse Martin E. Fermannn Photonics-enabled wideband microwave burst detection Optics Letters 43 7 1491 1494 20180300 naoya_kuse/published_papers/22293221 Yihan Li Naoya Kuse Martin Fermann Fast ultra-wideband microwave spectral scanning utilizing photonic wavelength- and time-division multiplexing OPTICS EXPRESS 1094-4087 25 16 18863 18871 20170800 10.1364/OE.25.018863 naoya_kuse/published_papers/22293235 Yihan Li Naoya Kuse Antoine Rolland Yuriy Stepanenko Czeslaw Radzewicz Martin E. Fermann Low noise, self-referenced all polarization maintaining Ytterbium fiber laser frequency comb OPTICS EXPRESS 1094-4087 25 15 18017 18023 20170700 10.1364/OE.25.018017 naoya_kuse/published_papers/22293236 Naoya Kuse Martin E. Fermann Electro-optic comb based real time ultra-high sensitivity phase noise measurement system for high frequency microwaves Scientific Reports 7 2847 null 20170600 naoya_kuse/published_papers/22293238 Noriaki Ohmae Naoya Kuse Martin E. Fermann Hidetoshi Katori All-polarization-maintaining, single-port Er: fi ber comb for high-stability comparison of optical lattice clocks All-polarization-maintaining, single-port Er:fiber combs offer long-term robust operation as well as high stability. We have built two such combs and evaluated the transfer noise for linking optical clocks. A uniformly broadened spectrum over 135–285 THz with a high signal-to-noise ratio enables the optical frequency measurement of the subharmonics of strontium, ytterbium, and mercury optical lattice clocks with the fractional frequency-noise power spectral density of (1–2) × 10^-17Hz^-1/2at 1 Hz. By applying a synchronous clock comparison, the comb enables clock ratio measurements with 10^-17instability at 1 s, which is one order of magnitude smaller than the best instability of the frequency ratio of optical lattice clocks. Institute of Physics Applied Physics Express 1882-0778 10 6 062503 62503 20170500 10.7567/APEX.10.062503 naoya_kuse/published_papers/22293240 Naoya Kuse Thomas R. Schibli Martin E. Fermann Low noise electro-optic comb generation by fully stabilizing to a mode-locked fiber comb OPTICS EXPRESS 1094-4087 24 15 16884 16893 20160700 10.1364/OE.24.016881 naoya_kuse/published_papers/22293241 N. Kuse J. Jiang C. -C. Lee T. R. Schibli M. E. Fermann All polarization-maintaining Er fiber-based optical frequency combs with nonlinear amplifying loop mirror OPTICS EXPRESS 1094-4087 24 3 3095 3102 20160200 10.1364/OE.24.003095 naoya_kuse/published_papers/22293242 Naoya Kuse Chien-Chung Lee Jie Jiang Christian Mohr Thomas R. Schibli Martin E. Fermann Ultra-low noise all polarization-maintaining Er fiber-based optical frequency combs facilitated with a graphene modulator Optics Express 23 19 24342 24350 20150900 naoya_kuse/published_papers/22293243 Naoya Kuse Akira Ozawa Yohei Kobayashi Static FBG strain sensor with high resolution and large dynamic range by dual-comb spectroscopy Optics Express 21 9 11141 11149 20130400 naoya_kuse/published_papers/22293245 Naoya Kuse Akira Ozawa Yohei Kobayashi Comb-Resolved Dual-Comb Spectroscopy Stabilized by Free-Running Continuous-Wave Lasers Applied Physics Express 5 112402 null 20121000 naoya_kuse/published_papers/22293247 Naoya Kuse Akira Ozawa Yutaka Nomura Isao Ito Yohei Kobayashi Injection locking of Yb-fiber based optical frequency comb Optics Express 20 10 10509 10518 20120400 naoya_kuse/published_papers/22293248 Naoya Kuse Yutaka Nomura Akira Ozawa Makoto Kuwata-Gonokami Shuntaro Watanabe Yohei Kobayashi Self-compensation of third-order dispersion for ultrashort pulse generation demonstrated in an Yb fiber oscillator OPTICS LETTERS 1539-4794 35 23 3868 3870 20101200 10.1364/OL.35.003868 naoya_kuse/misc/50239901 久世 直也 マイクロコムを使って多腕バンディット問題を解く オプトロニクス 44 120 176 180 20250400 naoya_kuse/misc/48417057 久世 直也 マイクロコムのライダーへの応用 レーザー研究 52 11 null null 20241100 naoya_kuse/misc/48417037 安井 武史 南川 丈夫 時実 悠 久世 直也 駒 貴明 上田 隆雄 野間口 雅子 不可視光が切り拓く光の世紀 クリーンテクノロジー 34 6 49 53 20240600 naoya_kuse/misc/48417021 安井 武史 南川 丈夫 時実 悠 久世 直也 駒 貴明 上田 隆雄 野間口 雅子 目に見えない光が切り拓く『光の世紀』 精密工学会誌 89 8 587 591 20230800 naoya_kuse/misc/33159115 久世 直也 マイクロコムによる光周波数コムの新展開 フォトニクスニュース 7 1 40 44 20210600 naoya_kuse/misc/33159104 吉井 一倫 久世 直也 美濃島薫 次世代光周波数コム - 中赤外光周波数コムと集積光周波数コム - 月刊オプトロニクス2020年9月号 null null 20200900 naoya_kuse/misc/37283796 大前 宣昭 久世 直也 Fermann Martin E. 香取 秀俊 Low-noise erbium fiber comb for high-stability comparison of optical lattice clocks 光格子時計の高安定比較のための低雑音エルビウムファイバコムの開発 (電子回路研究会・最先端光領域周波数計測) 電気学会 電気学会研究会資料. ECT = The papers of technical meeting on electronic circuits, IEE Japan 2017 89 1 6 20170911 naoya_kuse/misc/17267797 久世直也 小澤陽 小林洋平 デュアルコム分光∼FT-IRにかわる高速広帯域精密分光∼ 日本物理学会誌 0029-0181 69 1 null null 20130000