Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Kazuya Takasago"'
Autor:
Tomohiro Imahoko, Hitoshi Sekita, Tetsumi Sumiyoshi, Kazuya Takasago, Minoru Obara, M. Kamata, J. Sakuma
Publikováno v:
Applied Physics B. 89:217-222
We have developed a pulsed Yb:YAG thin disk green laser for pumping a 100 kHz and 10 W femtosecond laser. We optimized numerically and experimentally the open duration of the acousto-optic (AO) Q-switcher and the internal SHG method, generating stabl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72ee7d425a8f7384a57991c1889b9239
https://doi.org/10.1007/s00340-007-2806-4
https://doi.org/10.1007/s00340-007-2806-4
Autor:
Tetsumi Sumiyoshi, Kazuya Takasago, Minoru Obara, Tomohiro Imahoko, Katsutoshi Takahashi, Hitoshi Sekita
Publikováno v:
Applied Physics B. 87:629-634
We have developed a 6–12 μm mid-infrared (MIR) femtosecond laser source for glyco-protein structure analysis. The MIR femtosecond laser pulses are generated by a differential frequency generation (DFG) configuration with a combination of Ti:sapphi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cff20bddb6574409ccc6c52e45d26e2e
https://doi.org/10.1007/s00340-007-2657-z
https://doi.org/10.1007/s00340-007-2657-z
Autor:
Kazuya Takasago, H. Nagaoka, Fumihiko Kannari, K. Kobayashi, Kenji Torizuka, Akira Endo, Masakazu Washio, Taisuke Miura
Publikováno v:
Applied Physics B. 75:19-23
Two mode-locked Ti:sapphire lasers of different wavelengths were precisely synchronized by a simple feedback system employing sum-frequency generation (cross correlation). When the timing error exceeded the pulse duration, the periodic bunch of the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d159385c0b52a74032b1ca193a20739
https://doi.org/10.1007/s00340-002-0994-5
https://doi.org/10.1007/s00340-002-0994-5
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 4:346-352
We numerically and experimentally evaluate the performance of programmable femtosecond pulse shaping with specified time-dependent amplitude and phase profiles using phase-only masks. With the masks that have discrete phase levels of /spl ges/4 desig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c188dd7326a4773aa45648f1c66d16b4
https://doi.org/10.1109/2944.686741
https://doi.org/10.1109/2944.686741
Publikováno v:
The Review of Laser Engineering. 22:843-849
A simple iterative-calculation-based method for reconstructing time histories of intensity and phase for a commercially available Ti3+: Al2O3 mode-locked femtosecond laser pulse is demonstrated. Time histories of intensity and phase, which are recons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::692e0e15f696470dc0690f7e4ef40862
https://doi.org/10.2184/lsj.22.843
https://doi.org/10.2184/lsj.22.843
Publikováno v:
2008 Conference on Lasers and Electro-Optics.
We have demonstrated the second harmonic generation with output pulses of a 50 kHz Ti:sapphire regenerative amplifier. 280 fs pulses with an average power of 3.1 W were generated at 389 nm.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cd574e971a5b282b87ca0b55f225e3f
https://doi.org/10.1109/cleo.2008.4552354
https://doi.org/10.1109/cleo.2008.4552354
Publikováno v:
Applied optics. 39(14)
A new, to our knowledge, space-variant optical interconnection system based on a spatial-phase code-division multiple-access technique with multiplexed Fourier holography is described. In this technique a signal beam is spread over wide spatial frequ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e90a311678f81f9c3fb9959c1407b8f
https://pubmed.ncbi.nlm.nih.gov/18345134
https://pubmed.ncbi.nlm.nih.gov/18345134
Autor:
Tomohiro Imahoko, Masanao Kamata, Tetsumi Sumiyoshi, Kazuya Takasago, Hitoshi Sekita, Susumu Tsujikawa
Publikováno v:
2007 Quantum Electronics and Laser Science Conference.
We solved the stability, life-time and cost problems of femtosecond lasers and opened the door to their huge commercial market in near future. Femtosecond lasers will be used in the semiconductor and LCD manufacturing factory.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2c2708559fcaa37e8711de53015c611
https://doi.org/10.1109/qels.2007.4431528
https://doi.org/10.1109/qels.2007.4431528
Autor:
Tomohiro Imahoko, N. Inoue, Tetsumi Sumiyoshi, Kazuya Takasago, K. Yoshida, Minoru Obara, T. Ando, Z. Zhang, Katsutoshi Takahashi
Publikováno v:
2006 IEEE LEOS Annual Meeting Conference Proceedings.
We have developed a mid-infrared femtosecond laser source with high stability and optical system for glycol-protein structure analysis. The DFG (difference frequency generation) light was irradiated to the SLeX proton added ion to a photo-dissociate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb7e87c276f3b31a0f4fb84d46d2acdc
https://doi.org/10.1109/leos.2006.278819
https://doi.org/10.1109/leos.2006.278819
Publikováno v:
2005 Pacific Rim Conference on Lasers & Electro-Optics.
We have developed a high-repetition, 1-W, and 70 fs regenerative amplifier system. The stable operation was obtained due to a seeding fiber laser, a compact folded cavity, and a green pump source built by ourselves.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24f549e3437f747e8037c5f0da41f7a3
https://doi.org/10.1109/cleopr.2005.1569346
https://doi.org/10.1109/cleopr.2005.1569346