100 ps far-infrared laser pulses from optically pumped D2O |
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| Institution: | 1. Science and Mineral Resource, China University of Geosciences, Beijing 100083, China;2. Gold Geological Institute of CAPF, Langfang 065000, Hebei, China;3. MRL Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;4. Economic Geology Research Center, College of Science, Technology and Engineering, James Cook University, Townsville 4811, Australia;5. Surveying Geotechnical Research Co., Ltd of MCC, Wuhan 430080, Hubei, China |
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| Abstract: | In this paper we report the generation of ultrashort far-infrared laser pulses with durations less than 100 ps, powers exceeding 200 kW and intensities of more than 1.5 MW/cm2. Far-infrared radiation was produced via stimulated resonance Raman scattering using a high-pressure CO2-laser as pump source and the heavy water isotopes D216O and D218O as far-infrared laser media. Pulses achieved from this laser system were detected by a novel type of detector, sensitive over a broad spectral range from the far-infrared to the visible, basing on quasiparticle heating in a strip-line structured YBa2Cu3O7−δ thin film. |
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