19 November 2012 Three-year program to improve critical 1-micron Qsw laser technology for Earth observation
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Laser remote sensing technologies are valuable for a variety of scientific requirements. These measurement techniques are involved in several earth science areas, including atmospheric chemistry, aerosols and clouds, wind speed and directions, prediction of pollution, oceanic mixed layer depth, vegetation canopy height (biomass), ice sheet, surface topography, and others. Much of these measurements have been performed from the ground to aircraft over the past decades. To improve knowledge of these science areas with transport models (e.g. AGCM), further advances of vertical profile are required. JAXA collaborated with NICT and RIKEN started a new cross-sectional 3-year program to improve a technology readiness of the critical 1-micron wavelengths from 2011. The efficient frequency conversions such as second and third harmonic generation and optical parametric oscillation/generation are applied. A variety of elements are common issues to lidar instruments, which includes heat rejection using high thermal conductivity materials, laser diode life time and reliability, wavelength control, and suppression of contamination control. And the program has invested in several critical areas including advanced laser transmitter technologies to enable science measurements and improvement of knowledge for space-based laser diode arrays, Pockels cells, advanced nonlinear wavelength conversion technology for space-based LIDIRs. Final goal is aim to realize 15 watt class Q-switched pulse laser over 3-year lifetime.
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Daisuke Sakaizawa, Daisuke Sakaizawa, Yoshikazu Chishiki, Yoshikazu Chishiki, Yohei Satoh, Yohei Satoh, Tatsuyuki Hanada, Tatsuyuki Hanada, Shiro Yamakawa, Shiro Yamakawa, Takayo Ogawa, Takayo Ogawa, Satoshi Wada, Satoshi Wada, Shoken Ishii, Shoken Ishii, Kohei Mizutani, Kohei Mizutani, Motoaki Yasui, Motoaki Yasui, } "Three-year program to improve critical 1-micron Qsw laser technology for Earth observation", Proc. SPIE 8526, Lidar Remote Sensing for Environmental Monitoring XIII, 85260V (19 November 2012); doi: 10.1117/12.979665; https://doi.org/10.1117/12.979665

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