Explanipedia

Wavelength-versatile Laguerre-Gaussian mode source based on Pr3+: WPFG fiber laser Open

Yuto Yoneda, A. Srinivasa Rao, Yasushi Fujimoto, Takashige Omatsu · 2025

We report the direct generation of wavelength-versatile Laguerre-Gaussian (LG) modes with positive and negative topological charge at cyan (490 nm), green (523 nm), orange (605 nm), red (637 nm), and deep red (697 nm) wavelengths from a di…

Retrospective study of definitive therapy for head and neck mucosal melanoma: The RESUME study Open

Motoo Nomura, Naomi Kiyota, Yasushi Shimizu, Atsushi Motegi, Tetsuo Akimoto , et al. · 2025

Background: Head and neck mucosal melanoma (HNMM) is a rare melanoma. Surgery and radiotherapy (RT) are commonly used; however, their effectiveness remains unclear. In addition, the role of immune checkpoint inhibitors (ICIs) in improving …

Multi‐Color Optical Quasiparticle Laser Source Formed of a Pr3+ Doped Fiber Laser with a Dual‐Output Coupling Geometry Open

Yuto Yoneda, A. Srinivasa Rao, William R. Kerridge‐Johns, Yasushi Fujimoto, Takashige Omatsu · 2024

The generation of multicolor (523, 605, 637, and 719 nm) optical quasiparticles (bimerons and skyrmions with topologically protected polarization textures) from a diode‐pumped Pr 3+ ‐doped fluoro‐aluminate glass (Pr 3+ : WPFG) fiber simply…

Direct generation of multicolor Bessel beams from a Pr3+: WPFG fiber laser Open

Yuto Yoneda, A. Srinivasa Rao, Yasushi Fujimoto, Katsuhiko Miyamoto, Takashige Omatsu · 2024

Multicolor visible high-order Bessel (Bessel-vortex) beams which have a helical wavefront and a long confocal length have garnered significant interest for applications in materials processing and biomedical technologies. In this paper, we…

A case of malignant transformation to angiosarcoma during long-term follow-up of a cervical schwannoma Open

Takuma Takeuchi, Hiromu Nakamura, Shunpei Yamanaka, Daisuke Inukai, Takashi Maruo , et al. · 2024

神経鞘腫が血管肉腫に悪性転化した1例を報告する。症例は46歳の男性,左頸部腫瘍の増大と頭痛のため当院を受診した。CT画像では,左胸鎖乳突筋の深部に長径約80mmの腫瘤性病変を認め,境界は明瞭で辺縁の造影効果が強いが,内部は出血や壊死の可能性を示す広範な低吸収領域を認めた。細胞診では悪性細胞が検出されたが,病理確定診断には至らなかった。診断と治療の目的で腫瘍切除を施行したところ,神経鞘腫と血管肉腫が併存しており,神経鞘腫が悪性転化した血管肉腫と診断された。手術後,早期再発腫瘍…

Artesunate and cisplatin synergistically inhibit HNSCC cell growth and promote apoptosis with artesunate‑induced decreases in Rb and phosphorylated Rb levels Open

Hiroki Okamoto, Kazuhiro Yoshikawa, Akiko Shimada, Rui Sano, Daisuke Inukai , et al. · 2023

In the treatment of head and neck cancer, cisplatin is often used as a therapeutic agent; however, its efficacy is limited and it can cause renal dysfunction as an adverse effect. For this reason, the use of cisplatin is limited in elderly…

Red, orange, and dual wavelength vortex emission from Pr:WPFGF fiber laser using a microscope slide output coupler Open

William R. Kerridge‐Johns, A. Srinivasa Rao, Yasushi Fujimoto, Takashige Omatsu · 2023

Visible vortex beams have a large array of applications; however, the sources are often large or complex. Here, we present a compact vortex source with red, orange, and dual wavelength emission. This Pr:Waterproof Fluoro-Aluminate Glass fi…

Establishment of Mucoepidermoid Carcinoma Cell Lines from Surgical and Recurrence Biopsy Specimens Open

Shunpei Yamanaka, Susumu Suzuki, Hideaki Ito, Sivasundaram Karnan, Ichiro Hanamura , et al. · 2023

Patients with advanced/recurrent mucoepidermoid carcinoma (MEC) have a poor prognosis. This study aimed to establish and characterize human mucoepidermoid carcinoma cell lines from the initial surgical specimen and biopsy specimen upon rec…

Development of a Primary Yellow (575 Nm) Laser by Dy3+-Doped Double-Clad-Structured Waterproof Fluoro-Aluminate Glass Fiber Open

Yasushi Fujimoto, Kenta Takahashi, Natsuho Nashimoto, Ayaka Koganei, Hiroya Katuragawa , et al. · 2023

Examination on Current Situation in Training Optical Engineers Open

Yasushi Fujimoto · 2022

Rod‐Type Ce/Cr/Nd : YAG Ceramic Lasers with White‐Light Pump Source Open

Taku Saiki, Tomoharu Iwashita, JIN J. SAKAMOTO, Toshiyuki Hayashi, T. Nakamachi , et al. · 2022

Ceramic is promising for use as a solid‐laser material pumped with solar or lamp light. We developed a Cr 3+ ion doped Nd : YAG ceramic laser that converts white light into near‐infrared laser light more efficiently. Investigation of its o…

Special Issue on Toward the Next Generation of Optical Fiber and Optical Device Technologies −Challenge the Limits of Stereotypes!− Open

Yasushi Fujimoto · 2020

"Transcending" is such a comfortable word. "Transcending" technology not only contributes to the development in a specific field, but its influence rapidly and widely spreads to peripheral fields. This special issue picks up some technolog…

Potential of Functional Silica Glass by Zeolite Method and Development of Specialty Fiber Elements Open

Yasushi Fujimoto · 2020

The zeolite method enables the uniform dispersion of impurity elements, particularly rare-earth elements, in silica glass. Applications primarily allow more ultra-high concentrations of rare-earth elements to be doped in silica glass than …

Examination optical education role of university for optical industry and efforts at Chiba Institute of Technology Open

Yasushi Fujimoto, Koji Suizu, Kazuki Wakita · 2019

As announced the other day, the 2018 Nobel Prize in Physics was given for the development of optical tweezers and ultrashort pulse lasers. Optical technology is constantly advancing and penetrating into various industrial fields. Recently,…

Comparison of Inspection Data by Difference in Odour Inspection Kit (Including Results of Young and Old Age) Open

Naomi Katayama, Shoko Kondo, Yui Nakayama, T Nakada, Seiya Goto , et al. · 2019

Comparison of Survey Results on Subjective Dizziness, Hearing and Tinnitus and Stabilometry Test Results in Yakumo Inhabitant Examination Study (Comparison of 2005, 2007 and 2015, 2017) Open

Naomi Katayama, Shoko Kondo, Yui Nakayama, Takafumi Nakada, Naoki Saji , et al. · 2019

Odour and salt taste identification in older adults: evidence from the Yakumo study in August 2014 Open

Naomi Katayama, Shoko Kondo, Satofumi Sugimoto, Seiya Goto, Wakako Kinoshita , et al. · 2019

Background: This study examined the relationship between olfactory function and taste function. A personal function test was calculated from the Yakumo study database, and the odour stick identification test and salt taste identification t…

Outlook in Refractance Window Drying Technology Open

Naomi Katayama, Shoko Kondo, Yui Nakayama, Takafumi Nakada, Seiya Goto , et al. · 2019

This study examined the relationship between olfactory function and taste function as same as last report.A personal function test was calculated from the Yakumo study database, and the odour stick identification test and salt taste identi…

Development of High-Efficiency UV Laser Generated by SHG Technique with Primary Visible Fiber Laser Open

Yasushi Fujimoto, Masamori Nakahara, Paul Binun, Shinji Motokoshi, Osamu Ishii , et al. · 2019

We are developing a compact, high-efficiency continuous-wave UV (CW-UV) laser system whose concept is that the CW-UV laser source is only generated by a second harmonic generation (SHG) technique with a visible fiber laser excited by blue …

Odour and Salt Taste Identification in Older Adults: Evidence from The Yakumo Study in August, 2015 - 2017 Open

Naomi Katayama, Shoko Kondo, Yui Nakayama, Takafumi Nakada, Seiya Goto , et al. · 2018

This study examined the relationship between olfactory function and taste function as same as last report.A personal function test was calculated from the Yakumo study database, and the odour stick identification test and salt taste identi…

Development of all-fiber Fabry-Perot pulse laser with a fiber type saturable absorber and improvement of the oscillation characteristics Open

Shogo Fukuyama, Minoru Yoshida, Yasushi Fujimoto · 2018

We developed high-concentration erbium doped fiber as a saturable absorber, making use of its concentration quenching. Then, we developed all-fiber Fabry-Perot pulse laser with high-concentration erbium doped fiber, and demonstrated it ena…

Odour and Salt Taste Identification in Older Adults: Evidence from the Yakumo Study in August, 2016 Open

Naomi Katayama, Shoko Kondo, Satofumi Sugimoto, Wakako Kinoshita, Masaaki Teranishi , et al. · 2018

We performed taste and olfactometry in Yakumo-cho inhabitants examination in 2015 and reported the result in Advances in Sciences and Engineering 2017.This study examined the relationship between olfactory function and taste function as sa…

Odour and Salt Taste Identification in Older Adults: Evidence from the Yakumo Study in August, 2016 Open

Naomi Katayama, Shoko Kondo, Satofumi Sugimoto, Wakako Kinoshita, Masaaki Teranishi , et al. · 2018

We performed taste and olfactometry in Yakumo-cho inhabitants examination in 2015 and reported the result in Advances in Sciences and Engineering 2017.This study examined the relationship between olfactory function and taste function as sa…

Optimization of loading ratio of ErN as regenerator of 4K-GM cryocooler Open

Takashi Nakagawa, Tatsuya Miyauchi, Toshihiko SHIRAISHI, Satoshi Seino, Takao A. Yamamoto , et al. · 2017

High purity erbium nitride (ErN) spheres with the size range of 150-180 µm and 180-212 µm were prepared by nitriding Er metal spheres with low oxygen content. The initial regenerator material of HoCu2 on the cold end of the second regenera…

Visible ns‐pulse laser oscillation in Pr‐doped double‐clad structured waterproof fluoride glass fibre with SESAM Open

Shota Kajikawa, Minoru Yoshida, Shinji Motokoshi, Osamu Ishii, Masaaki Yamazaki , et al. · 2017

A visible Q‐switched pulse train at 639 nm was successfully generated in a Pr‐doped double‐clad structured waterproof fluoride glass fibre with a semiconductor saturable absorber mirror. The slope efficiency was calculated as 36.3%. The pu…

Erratum: “Partially deuterated potassium dihydrogen phosphate optimized for ultra-broadband optical parametric amplification” [J. Appl. Phys. 117, 093103 (2015)] Open

Kana Fujioka, Yasushi Fujimoto, Koji Tsubakimoto, Junji Kawanaka, Ichiro Shoji , et al. · 2016

First Page

The diagnostics of the energy coupling efficiency in the Fast Ignition integrated experiment Open

Yasunobu Arikawa, Shinsuke Fujioka, A. Morace, Zhe Zhang, Takahiro Nagai , et al. · 2016

The energy coupling efficiency (CE) in Fast Ignition (FI) laser fusion was studied at GEKKO XII and LFEx laser facility by using newly developed targets and plasma diagnostic instruments. The gated-liquid scintillator neutron detectors had…

Conceptual design of sub-exa-watt system by using optical parametric chirped pulse amplification Open

Junji Kawanaka, Koji Tsubakimoto, Hidetsugu Yoshida, Kana Fujioka, Yasushi Fujimoto , et al. · 2016

A 50 PW ultrahigh-peak-power laser has been conceptually designed, which is based on optical parametric chirped pulse amplification (OPCPA). A 250 J DPSSL and a flash- lamp-pumped kJ laser are adopted as new repeatable pump source. The exi…

Visible Pulse Fiber Laser Oscillation Properties Enhanced by Improved Transcription Method of Graphene Saturable Absorber Mirror Open

Shota Kajikawa, Tokinori Terao, Minoru Yoshida, Yasushi Fujimoto · 2016

Improved transcription method of graphene saturable absorber mirror (GSAM) is tested to enhance visible pulse fiber laser oscillation properties. When a graphene thin film on a dielectric multi-layered mirror is soaked in nitric acid solut…

Regenerator Material of Rare Earth Nitride (HoxEr1-xN) for a 4 K-GM Cryocooler Open

Kohei SHODA, Takayuki MIYAUCHI, Hiroshi Kobayashi, Takanori Nakano, Takashi Nakagawa , et al. · 2015

We synthesized HoxEr1-xN (x = 0, 0.25, 0.5) sphere materials using the hot isostatic pressing (HIP) method and studied the regenerator performance by measuring the cooling power obtained by a 4 K-GM cryocooler loaded with them. At 4.2 K, w…

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