[13p-B3-1~9] 3.5 Laser system and materials

▲ [13p-B3-6] Generation of multi-nano-Joule 650 nm optical pulses based on a synchronously driven gain-switched 1300 nm laser diode

〇Hung JuiHung¹, Yi-Cheng Fang¹, Tomomi Nemoto², Shunichi Sato³, Lung-Han Peng⁴, Hiroyuki Yokoyama¹ (1.NICHe, Tohoku Univ., 2.RIES, Hokkaido Univ., 3.IMRAM, Tohoku Univ., 4.GIPO, National Taiwan Univ.)

Keywords:Stimulated Emission Depletion, STED, Gain switched laser diode, GSLD

In recent years, the pulsed stimulated emission depletion (pulsed STED) microscopy technologies are attracting much attention to reduce the light power necessary for achieving super-resolution microscopy. The simplest method to obtain pulsed STED source is to use a pulsed laser diode (LD) for generating pico- to nano-second duration STED light pulse. A drawback of direct generation of optical pulses from an LD is, however, the limited pulse energy (in general, less than 0.1nJ). We here demonstrate that multi-nano-Joule 650nm STED optical pulses are generated by taking second-harmonic-generation (SHG) of amplified optical pulses from gain-switched LD (GSLD), which is synchronized to an excitation optical pulse source.