研究・活動 Study & Activity
臨床工学科 School of Biomedical Engineering

臨床工学科 研究・活動内容

笠松　直史（かさまつ　ただし）

主な担当科目
電磁気学　電磁気学演習　医用画像機器　電気・電子実験
資格・学位
教授　博士（工学）

研究紹介

専門分野
医用工学　光・量子エレクトロニクス　医用光学　光センシング
研究概要
これまで、光・量子エレクトロニクスをベースに、新しいレーザ光源や光システムの開発と、それを用いた医療・生体・通信・計測分野などへの応用を行ってきました。医療・生体向けとして代表的なものは以下です。
〇2光子バイオイメージング向け超小型フェムト秒レーザの研究と顕微鏡への応用
〇光音響イメージング向けアレキサンドライトレーザの研究と臨床応用（共同研究）
〇新しい内視鏡向け光システム、光デバイスの開発研究
今後は、レーザ光のもつ波動性やコヒーレンス（可干渉性）に加え、量子的な性質をも付与することで生まれる特徴を活かした新しい光源や光センシングシステムを構築し、センシング性能やユーザビリティを向上することを目指していきます。
著書・学術論文
【原著論文】（抜粋）
1) S. Yamazoe, K. Katou, T. Adachi, and T. Kasamatsu, "Palm-top-size, 1.5-kW peak-power, and femtosecond (160 fs) diode-pumped mode-locked Yb+3:KY(WO4)2 solid-state laser with a semiconductor saturable absorber mirror," Optics Letters (vol. 35, no. 5, pp. 748-750), 2010.
2) Y. Wang, T. Kasamatsu, Y. Zheng, H. Miyajima, H. Fukuoka, S. Matsuoka, M. Niigaki, H. Kubomura, T. Hiruma, and H. Kan, "Cesium vapor laser pumped by a volume Bragg grating coupled quasi-continuous-wave laser-diode array," Applied Physics Letters (vol. 88, issue 14, 141112), 2006.
3) T. Kasamatsu, H. Kubomura, and H. Kan, "Numerical simulation of conversion efficiency and beam quality factor in second harmonic generation with diffraction and pump depletion," Japanese Journal of Applied Physics (part 1, Brief Communications), vol. 44, no. 12, pp. 8495-8497, 2005.
4) Y. Yakabe, T. Kasamatsu, and T. Ono, "1.65-um-band optical amplification with Er3+-doped fluorozirconate fiber using 0.8 um upconversion pumping," Electronics Letters (vol. 38, no. 21, pp. 1244-1245), 2002.
5) T. Kasamatsu, Y. Yano, and T. Ono, "1.49-um-band gain-shifted thulium-doped fiber amplifier for WDM transmission systems," IEEE Journal of Lightwave Technology, (vol. 20, no. 10, pp.1826-1838), 2002.
6) T. Kasamatsu, Y. Yano, and T. Ono, "Laser-diode-pumped highly-efficient gain-shifted thulium-doped fiber amplifier operating in the 1480-1510-nm band," IEEE Photonics Technology Letters, (vol. 13, no. 5, pp. 433-435), 2001.
7) T. Kasamatsu, Y. Yano, and T. Ono, "Gain-shifted dual-wavelength-pumped thulium-doped fiber amplifier for WDM signals in the 1.48-1.51-um wavelength region," IEEE Photonics Technology Letters, (vol. 13, no. 1, pp. 31-33), 2001.
8) T. Kasamatsu, Y. Yano, and T. Ono, "Laser-diode pumping (1.4 and 1.56 um) of gain-shifted thulium-doped fibre amplifier," Electronics Letters, (vol. 36, no. 19, pp. 1607-1609), 2000.
9) T. Kasamatsu, Y. Yano, and H. Sekita, "1.50-um-band gain-shifted thulium-doped fiber amplifier with 1.05- and 1.56-um dual-wavelength pumping," Optics Letters, (vol. 24, no. 23, pp. 1684-1686), 1999.
10) T. Kasamatsu, T. Sumiyoshi, and H. Sekita, "Laser-diode-pumped Yb:YAG laser as a new pump source and its application to an Er3+, Yb3+-codoped high-output-power fiber amplifier," Applied Physics B, (vol. 69, pp. 491-495), 1999.
11) T. Kasamatsu, H. Sekita, and Y. Kuwano, "Temperature dependence and optimization of 970-nm diode-pumped Yb:YAG and Yb:LuAG lasers," Applied Optics, (vol. 38, no. 24, pp. 5149-5153), 1999.
12) T. Kasamatsu and H. Sekita, "Laser-diode-pumped Nd:YAG active-mirror laser," Applied Optics, (vol. 36, no. 9, pp. 1879-1881), 1997.
13) T. Kasamatsu, M. Tsunekane, H. Sekita, Y. Morishige, and S. Kishida, "1 pm spectrally narrowed ArF excimer laser injection-locked by 4th harmonic seed source of 773.6 nm Ti:Sapphire laser," Applied Physics Letters, (vol. 67, no. 23, pp. 3396-3398), 1995.

【国際会議】（抜粋）
1. S. Hakuta, Y. Sugawara, S. Yamazoe, M. Naya, and T. Kasamatsu, "Membrane-type acoustic metamaterials with through-holes for lightweight sound insulation", International Conference on Ultrasonics, ICU2019, Bruges, Belgium, Sep.3-6, 2019.
2. A. Horiguchi, K. Tsujita, K. Irisawa, T. Kasamatsu, K. Ito, T. Asano, H. Tsuda, and M. Ishihara, "Development of photo-acoustic imaging system for improved real-time visualization of neurovascular bundle during radical prostatectomy," in Proc. American Urological Association conference, 2014 (Orlando), paper 14-181 (poster paper), Journal of Urology. vol.191, Issue 4s, e69-e70, 2014.
3. T. Yoshihiro, Y. Ono, and T. Kasamatsu, "Wavelength Insensitive, Non-contact and Highly Efficient Fiber Optic Connector using Up-tapered Multi-mode Optical Fibers," in Technical Digest of 8th Micro Optics Conference, October 2013, Tokyo, paper H52.
4. T. Kasamatsu, S. Yamazoe, M. Kato, and T. Adachi, "Palm-top-size GHz-repetition-rate visible femtosecond Yb:KY(WO4)2 laser, " in Proc. International Workshop on Holographic Memories and Display (IWHM&D 2009), December 2009, Tokyo, paper 4F-1　(invited).
5. S. Yamazoe, M. Katou, and T. Kasamatsu, "Ultra-compact (palm-top size), low-cost, maintenance-free (>3000 h), diode-pumped femtosecond (160 fs) solid-state laser source for multiphoton microscopy," in Proc. SPIE BiOS 2009, Muliphoton Microscopy in Biomedical Sciences ,February 2009, San Jose, vol.7183, paper 718334.
6. T. Kasamatsu and Y. Yano, "Tm-doped fiber amplifier for S-band," in Proc. Topical Meeting on Optical Amplifiers and Their Applications (OAA2001), July 2001, Stresa, Italy, paper OWB1　(invited).
7. K. Fukuchi, T. Kasamatsu, M. Morie, R. Ohhira, T. Ito, K. Sekiya, D. Ogasawara, and T. Ono, "10.92-Tb/s (273x40-Gb/s) triple-band/ultra-dense WDM optical-repeatered transmission experiment," in Proc. Optical Fiber Communication Conference (OFC2001), Anaheim, March 2001, postdeadline paper PD24.
8. T. Kasamatsu, Y. Yano, and H. Sekita, "Novel 1.50-m band gain-shifted thulium-doped fiber amplifier by using dual wavelength pumping of 1.05 m and 1.56 m," in Proc. Topical Meeting on Optical Amplifiers and Their Applications (OAA'99), June 1999, Nara, postdeadline paper PDP1.
所属学会
応用物理学会　レーザー学会　Optica（米国光学会）