[15p-213-5~20] 3.5 Laser system and materials

▼ [15p-213-18] Generation of sub-nanosecond multi-wavelength optical pulses based on semiconductor laser diodes and stimulated Raman scattering

〇Hung JuiHung¹, Kai-Hsun Chang¹, Yi-Cheng Fang¹, Lung-Han Peng², Hiroyuki Yokoyama¹ (1.NICHe, Tohoku Univ., 2.GIPO, National Taiwan Univ.)

Keywords:Gain-switched semiconductor optical amplifier, GS-SOA, Stimulated Raman Scattering, SRS, Stimulated Emission Depletion, STED

We have generated multi-wavelength sub-nanosecond optical pulses having pulse energy of nearly 10 nJ based on an advanced semiconductor laser technology. Smooth and single peak optical pulses are generated by the gain switching of a 1064-nm semiconductor-laser optical amplifier, and are converted to second-harmonic optical pulses after the amplification by Yb-doped optical fiber amplifiers. The second-harmonic pulses then are coupled into a single-mode fiber to induce 6 consecutive red-shifted peaks via stimulated Raman scattering. This wavelength-selectable sub-ns light source opens the possibility of multi-color stimulated emission depletion (STED) microscopy.