[19p-E205-1~19] 3.6 Ultrashort-pulse and high-intensity lasers

△ [19p-E205-3] Cr²⁺:ZnS mid-infrared mode-locked laser using single walled carbon nanotubes II

〇(D)Daiki Okazaki¹, Hayato Arai², Esko Kauppinen³, Shohei Chiashi², Shigeo Maruyama^2,4, Satoshi Ashihara¹ (1.IIS, The Univ. of Tokyo, 2.Faculty of Eng., UTokyo, 3.Aalto Univ., 4.AIST)

Keywords:carbon nanotube, laser, mid infrared

In this research, we are developing a Cr²⁺:ZnS mid-infrared mode-locked laser as a compact and highly efficient mid-infrared ultrashort light source for advanced vibrational spectroscopy and strong field phenomena.
By using single-walled carbon nanotubes as a saturable absorber, mode-locked oscillation with a pulse duration of 49 fs, a spectral width of 9.2 THz, and a center wavelength of 2.4 um has been realized.
Subsequently, we are planning to improve the power scalability of the mode-locked Cr²⁺:ZnS laser by evaluating and engineering the saturable absorption characteristics of nanotubes at a wavelength of 2.4 um.