Ultrashort-pulse generation directly from laser-diode-pumped mode-locked laser with high-gain and highly-nonlinear media.

• Project/Area Number: 25390123
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: University of Fukui
• Principal Investigator: KAWATO Sakae 福井大学, 工学(系)研究科(研究院), 准教授 (60313730)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 超短パルスレーザー / モード同期 / 半導体レーザー励起 / 固体レーザー / イッテルビウム / 高密度励起 / 高利得 / 高非線形 / 超短パルス / 非線形 / 高効率 / 高利得化 / 高次分散 / 高効率化

Outline of Final Research Achievements

We study high-efficiency ultrashort pulse generation from mode-locked laser with intra-cavity highly nonlinear media. Spectral broadening inside mode-locked laser by using intra-cavity highly nonlinear media is advantageous to obtain ultrashort pulses and broad output spectra because nonlinear effects are easily enhanced by resonation inside the cavity.
For the analysis, we used two theories; i.e. a laser efficiency theory in which high gain medium by high intensity pumping which causes high-thermo-optic effects and a nonlinear Schroedinger equation in which a gain medium, a fast saturable absorber for mode-locking, an output coupler as a cavity loss, the second, third and fourth order dispersion are included. On the nonlinear effect, self-phase modulation in the gain and nonlinear media are only included. From the analysis, high-efficiency ultrashort pulse generation in which the output spectra and pulse exceeding the gain spectra.

Research Products

• [Journal Article] Theoretical Analysis of Dependence of Nonlinear Effects in Mode-Locked Yb:YAG Lasers with a Highly Nonlinear Intra-Cavity Medium (2015)
  • Author(s): Takeshi Yoshida, Hiroaki Okunishi, Keisuke Kyomoto, Kento Kato, Kyosuke Shimabayashi, Shinichi Inayoshi, Motoki Morioka and Sakae Kawato
  • Journal Title: Applied Sciences Volume: 5 Issue: 4 Pages: 1431-1439
  • DOI: 10.3390/app5041431
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] High-efficiency cavity-dumped micro-chip Yb:YAG laser (2014)
  • Author(s): M. Nishio; A. Maruko; M. Inoue; M. Takama; S. Matsubara; H. Okunishi; K. Kato; K. Kyomoto; T. Yoshida; K. Shimabayashi; M. Morioka; S. Inayoshi; S. Yamagata; S. Kawato
  • Journal Title: Proc. SPIE 9238, Pacific Rim Laser Damage 2014: Optical Materials for High-Power Lasers Volume: 9238 Pages: 92380K-92380K
  • DOI: 10.1117/12.2073668
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Thin-rod Yb:YAG regenerative laser amplifier (2014)
  • Author(s): A. Maruko; M. Nishio; S. Matsubara; M. Tanaka; M. Takama; T. Yoshida; K. Kyomoto; H. Okunishi; K. Kato; K. Shimabayashi; M. Morioka; S. Inayoshi; S. Yamagata; S. Kawato
  • Journal Title: Proc. SPIE 9238, Pacific Rim Laser Damage 2014: Optical Materials for High-Power Lasers Volume: 9238 Pages: 92380L-92380L
  • DOI: 10.1117/12.2073664
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Development of ultrafast laser oscillators based on thulium-doped ZBLAN fibers (2014)
  • Author(s): Y. Nomura, M. Nishio, S. Kawato, T. Fuji
  • Journal Title: Journal of Selected Topcs in Quantum Electronics Volume: 99
  • Peer Reviewed
• [Journal Article] High efficiency laser-diode-pumped cavity-dumped ytterbium-doped Y3Al5O12 laser (2013)
  • Author(s): H. Hitotsuya, N. Shimojo, S. Matsubara, M. Inoue, and S. Kawato
  • Journal Title: International Journal of Latest Research in Science and Technology Volume: 2 Pages: 450-453
  • Peer Reviewed
• [Journal Article] Cavity-dumped mode-locked ytterbium-doped Y3Al5O12 laser (2013)
  • Author(s): H. Hitotsuya, M. Takama, M. Inoue, S. Matsubara, Y. Sasatani, N. Shimojo, and S. Kawato
  • Journal Title: International Journal of Latest Research in Science and Technology Volume: 2 Pages: 434-436
  • Peer Reviewed
• [Journal Article] Single-emitter laser-diode-pumped cavity-dumped ytterbium-doped Y3Al5O12 laser (2013)
  • Author(s): H. Hitotsuya, M. Takama, M. Inoue, S. Matsubara, Y. Sasatani, N. Shimojo, and S. Kawato
  • Journal Title: International Journal of Latest Research in Science and Technology Volume: 2 Pages: 442-446
  • Peer Reviewed
• [Journal Article] A Picosecond thin-rod Yb:YAG regenerative laser amplifier with the high average power of 20 W (2013)
  • Author(s): Shinichi Matsubara, Motoharu TANAKA, Masaki TAKAMA, Hiroyuki Hitotsuya, Taka Kobayashi, Sakae Kawato
  • Journal Title: Laser Physicls Letters Volume: 10 Pages: 55810-55810
  • Peer Reviewed
• [Presentation] Efficiency improvement of ultra-short pulse lasers (2016)
  • Author(s): Sakae Kawato
  • Organizer: EMN Meeting on Ultrafast 2016
  • Place of Presentation: Melbourne, Australia
  • Year and Date: 2016-10-16
  • Int'l Joint Research / Invited
• [Presentation] Ultrashort pulse and broadband generation directly from mode-locked laser within highly nonlinear medium (2015)
  • Author(s): Sakae Kawato, A. Maruko, T. Yoshida, S. Inayoshi, H. Okunishi, K. Kyomoto, K. Kato, M. Morioka, K. Shimabayashi, H. Kadoya, K. Hayashi, T. Sato, S. Takashima
  • Organizer: EMN Meeting on Ultrafast Research 2015
  • Place of Presentation: Las Vegas, Nevada, United States
  • Year and Date: 2015-11-16
  • Int'l Joint Research / Invited
• [Presentation] Higher order dispersion effects for ultrashort pulse generation directly from a mode-locked laser with an intra- cavity highly nonlinear medium (2015)
  • Author(s): S.Inayoshi, A. Maruko, T. Yoshida, K. Kyomoto, K. Kato, H. Okunishi, K. Shimabayashi, M. Morioka, H. Kadoya, K. Hayashi, T. Sato, S. Takashima, and S. Kawato
  • Organizer: Frontiers in Optics 2015
  • Place of Presentation: San Jose, California, United States
  • Year and Date: 2015-10-18
  • Int'l Joint Research
• [Presentation] Theoretical analysis for ultrashort pulse mode-locked Yb:YAG lasers with an intra-cavity highly nonlinear medium (2014)
  • Author(s): Takeshi Yoshida, Akiyuki Maruko, Keisuke Kyomoto, Masatoshi Nishio, Kento Kato, Hiroaki okunishi, Kyosuke Shimabayashi, Motoki Morioka, Shinichi Inayoshi, Sayumi Yamagata, and Sakae Kawato
  • Organizer: Advanced Solid-State Lasers
  • Place of Presentation: 上海
  • Year and Date: 2014-11-16
• [Presentation] Influences of high intensity pumping for laser threshold intensity (2014)
  • Author(s): K Kato, M. Nishio ,H. Okunishi , A. Maruko, K. Kyomoto, T. Yoshida, S Inayoshi, M Morioka, S Yamagata K Shimabayashi, D Mizuno and Sakae Kawato
  • Organizer: Advanced Solid-State Lasers
  • Place of Presentation: 上海
  • Year and Date: 2014-11-16
• [Presentation] Mode-Locked Thulium-Doped ZBLAN Fiber Laser Oscillators at 2 μm (2014)
  • Author(s): Yutaka Nomura, Masatoshi Nishio, Sakae Kawato, and Takao Fuji
  • Organizer: Advanced Solid-State Lasers
  • Place of Presentation: 上海
  • Year and Date: 2014-11-16
• [Presentation] Theoretical analysis for ultrashort pulse mode-locked Yb:YAG lasers with an intra-cavity highly nolinear medium (2014)
  • Author(s): Akiyuki Maruko, Takeshi Yoshida, Masatoshi Nishio, Keisuke Kyomoto, Kento Kato, Hiroaki Okunishi, Sakae Kawato
  • Organizer: Europhoton
  • Place of Presentation: Neuchatel
  • Year and Date: 2014-08-28
• [Presentation] Z型レーザー共振器における収差及び利得媒質の熱光学歪効果の影響に関する研究 (2014)
  • Author(s): 京元 敬介, 西尾 正敏, 丸小 淳幸, 奥西 弘旭, 加唐 賢人, 吉田 武志, 松原 伸一, 川戸 栄
  • Organizer: レーザー研シンポジウム 2014
  • Place of Presentation: 大阪大学
• [Presentation] 半導体レーザー励起固体レーザーの高効率化に関する研究 (2014)
  • Author(s): 嶋林 恭輔，下条 直哉，西尾 正敏，丸小 淳幸，奥西 弘旭，加唐 賢人，京元 敬介，吉田 武志，川戸 栄
  • Organizer: レーザー研シンポジウム 2014
  • Place of Presentation: 大阪大学
• [Presentation] レーザー発振時における利得媒質の熱光学歪効果の測定法 (2014)
  • Author(s): 加唐 賢人, 京元 敬介, 西尾 正敏, 丸小 敦幸, 奥西 弘旭, 吉田 武志, 川戸 栄††
  • Organizer: レーザー研シンポジウム 2014
  • Place of Presentation: 大阪大学
• [Presentation] V型レーザー共振器における収差及び利得媒質の熱光学歪効果の影響に関する研究 (2014)
  • Author(s): 奥西 弘旭，西尾 正敏，丸小 淳幸，加唐 賢人，京元 敬介，吉田 武志，川戸 栄
  • Organizer: レーザー研シンポジウム 2014
  • Place of Presentation: 大阪大学
• [Presentation] モード同期レーザーの非線形材料を用いた短パルス出力化に関する理論的解析 (2014)
  • Author(s): 吉田 武志, 西尾 正敏, 丸小 淳幸, 奥西 弘旭, 加唐 賢人, 京元 敬介, 川戸 栄, 實野孝久
  • Organizer: レーザー研シンポジウム 2014
  • Place of Presentation: 大阪大学
• [Presentation] Regenerative spectral and pulse shaping of thin-rod Yb:YAG amplifier (2014)
  • Author(s): Akiyuki MARUKO, Masatoshi NISHIO, Shinichi MATSUBARA, Motoharu TANAKA, Masaki TAKAMA and S Kawato
  • Organizer: Optics and Photonics International Congress 2014
  • Place of Presentation: パシフィコ横浜
• [Presentation] High efficiency cavity dumped micro-chip Yb:YAG laser (2014)
  • Author(s): Masatoshi NISHIO, Naoya SHIMOJO, Akiyuki MARUKO, Daisuke KIMURA, Hiroaki OKUNISHI, Keisuke KYOMOTO, Kento KATO, Takeshi YOSHIDA, and Sakae KAWATO
  • Organizer: Optics and Photonics International Congress 2014
  • Place of Presentation: パシフィコ横浜
• [Presentation] 高密度LD励起Yb:YAGレーザの高効率発振 (2014)
  • Author(s): 西尾正敏・下條直哉・丸小淳幸・木村大介・奥西弘旭・加唐賢人・京元敬介・吉田武志・嶋林恭輔・川戸 栄
  • Organizer: レーザー学会「固体・半導体レーザー」 電子情報通信学会レーザ・量子エレクトロニクス研究会技術報告
  • Place of Presentation: 福井大学
• [Presentation] 共振器内部に非線形媒質を挿入したモード同期レーザの超短パルス化および広帯域化に関する非線形波動伝播解析 (2014)
  • Author(s): 丸小淳幸・木村大介・下條直哉・西尾正敏・奥西弘旭・加唐賢人・京元敬介・吉田武志・嶋林恭輔・川戸 栄
  • Organizer: レーザー学会「固体・半導体レーザー」 電子情報通信学会レーザ・量子エレクトロニクス研究会技術報告
  • Place of Presentation: 福井大学
• [Presentation] High efficiency laser-diode-pumped continuous-wave Yb:YAG laser at room temperature (2014)
  • Author(s): M. Nishio, N. Shimojo, S.Maruko, H. Okunishi, K. Kato, K. Kyomoto, T. Yoshida, and S. Kawato
  • Organizer: Conference on Lasers and Electro-Optics 2014
  • Place of Presentation: San Jose, USA
• [Presentation] Ultrafast 2 micro-meter Laser Oscillators Based on Thulium-Doped ZBLAN Fibers (2014)
  • Author(s): Yutaka Nomura, Masatoshi Nishio, Sakae Kawato, and Takao Fuji
  • Organizer: International Conference on Ultrafast Phenomena 2014
  • Place of Presentation: 沖縄コンベンションセンター
• [Presentation] Development of femtosecond thulium-doped ZBLAN fiber laser oscillators (2014)
  • Author(s): Yutaka Nomura, Masatoshi Nishio , Sakae Kawato, and Takao Fuji
  • Organizer: Conference on Lasers and Electro-Optics 2014
  • Place of Presentation: San Jose, USA
• [Presentation] High efficiency Multi-mode laser-diode-pumped cavity-dumped Ytterbium-doped Yttrium Alminium Garnet laser (2013)
  • Author(s): N. Shimojo, S. Matsubara, M. Inoue, D. Kimura, Y. Sasatani, A. Maruko, D. Mizuno, M. Nishio,and and S. Kawato
  • Organizer: The European Conference on Lasers and Electro-Optics
  • Place of Presentation: Munich, Germany
• [Presentation] Continuous-wave Yb3Al5O12 laser pumped by a single-mode laser-diode (2013)
  • Author(s): N. Shimojo, Y. Kondo, D. Kimura, M. Inoue, S. Matsubara, A. Maruko, D. Mizuno, M. Nishio, and S. Kawato
  • Organizer: Advanced Solid-State Lasers
  • Place of Presentation: Paris, France
• [Presentation] Multimode Laser-Diode Pumped Continuous-Wave Stoichiometric Yb3Al5O12 Laser (2013)
  • Author(s): D. Kimura, S. Matsubara, K. Otani, T. Ueda, M. Inoue, N. Shimojo, Y. Ssatani, A. Maruko, D. Mizuno, M. Nishio, and S. Kawato
  • Organizer: The European Conference on Lasers and Electro-Optics
  • Place of Presentation: Munich, Germany
• [Presentation] LD励起Yb:YAGレーザーの高効率化 (2013)
  • Author(s): 下條直哉,加唐賢人,木村大介,丸子淳幸,西尾正敏,奥西弘旭,京元敬介,吉田武志,川戸栄
  • Organizer: レーザー学会「固体・半導体レーザー」 電子情報通信学会レーザ・量子エレクトロニクス研究会技術報告
  • Place of Presentation: 金沢大学
• [Presentation] 高効率レーザーダイオード励起Yb:YAGキャビティダンプレーザーの研究 (2013)
  • Author(s): 下條直哉, 松原伸一, 木村大介 , 丸小淳幸, 西尾正敏, 吉田武志, 奥西弘旭, 加唐賢人, 京元敬介, 川戸栄
  • Organizer: Japan Photonics Network of Student 2013
  • Place of Presentation: 福井大学
• [Presentation] ストイキオメトリックYb3Al5O12レーザー (2013)
  • Author(s): 木村大介, 下條直哉, 松原伸一, 丸小淳幸, 西尾正敏, 吉田武志, 奥西弘旭, 加唐賢人, 京元敬介, 川戸栄
  • Organizer: Japan Photonics Network of Student 2013
  • Place of Presentation: 福井大学
• [Presentation] High Efficiency Cavity-Dumped Mode-Locked Yb:YAG Laser (2013)
  • Author(s): N. Shimojo, M. Takama, M. Inoue, S. Matsubara, D. Kimura, A. Maruko, D. Mizuno, M. Nishio, and S. Kawato
  • Organizer: レーザー研シンポジウム 2013
  • Place of Presentation: 大阪大学
• [Remarks]
  • URL: https://www.researchgate.net/profile/Sakae_Kawato
• [Remarks]
  • URL: https://u-fukui.academia.edu/SKawato