Nobuhiko Sarukura

By Tomoya Ogawa, Nobuhiko Sarukura, Masahito Watanabe, Tsuguo Fukuda, Nobuhito Nango, Yasunobu Arikawa, Kohei Yamanoi, Tomoharu Nakazato, Marilou Cadatal-Raduban, Toshihiko Shimizu, Mitsuo Nakai, Takayoshi Norimatsu, Hiroshi Azechi, Takahiro Murata, Shigeru Fujino, Hideki Yoshida, Kei Kamada, Yoshiyuki Usuki, Toshihisa Suyama, Akira Yoshikawa, Nakahiro Sato, Hirofumi Kan, Hiroaki Nishimura, Kunioki Mima, Masahito Hosaka, Masahiro Katoh, Nobuhiro Kosugi, Kentaro Fukuda, Takayuki Yanagida, Yuui Yokota, Fumio Saito, Kouhei Sakai, Dirk Ehrentraut, Mitsuru Nagasono, Tadashi Togashi, Atsushi Higashiya, Makina Yabashi, Tetsuya Ishikawa, Haruhiko Ohashi and Hiroaki Kimura

Part of the book: Nuclear Power

By Marilou Cadatal-Raduban, Minh Hong Pham, Luong Viet Mui, Nguyen Dai Hung and Nobuhiko Sarukura

Transient cavity method used to generate ultrashort laser pulses in dye lasers is extended to a solid-state gain medium. Numerical simulations are performed to investigate the spectro-temporal evolution of broadband ultraviolet (UV) laser emission from Ce3+-doped LiCaAlF6 (Ce:LiCAF), which is represented as a system of two homogeneous broadened singlet states. By solving the rate equations extended to multiple wavelengths, the appropriate cavity length and Q-factor for optimal photon cavity decay time and pumping energy that will generate resonator transients is determined. Formation of resonator transients could generate picosecond UV laser pulses from a Ce:LiCAF crystal pumped by the fourth harmonics (266 nm) of a Nd:YAG laser. Numerical simulations indicate that a 1-mol% Ce3+-doped LiCAF crystal that is 1-mm long can generate a single picosecond pulse. This is accomplished by using a low Q (output coupler reflectivity of 10%), short cavity (cavity length of 2 mm) laser oscillator. Ultrashort pulses can also be generated using other rare earth-doped fluoride laser materials using this technique.

Part of the book: Numerical Simulations in Engineering and Science