Field-deployable prototype of the 1.53-µm coherent DIAL for simultaneous vertical profiling of water vapor density and wind speed and direction

H. Tsuji; M. Imaki; T. Yanagisawa; K. Shigyo; S. Kameyama

doi:10.1117/12.2636104

28 October 2022 Field-deployable prototype of the 1.53-μm coherent DIAL for simultaneous vertical profiling of water vapor density and wind speed and direction

H. Tsuji, M. Imaki, T. Yanagisawa, K. Shigyo, S. Kameyama

Author Affiliations +

Proceedings Volume 12265, Remote Sensing of Clouds and the Atmosphere XXVII; 1226508 (2022) https://doi.org/10.1117/12.2636104
Event: SPIE Remote Sensing, 2022, Berlin, Germany

Abstract

We show the field-deployable prototype which can demonstrate this concept in the field testing. The prototype has the newly developed optical transceiver and optics. The transceiver integrates all functions of (i) pulse modulation of the transmitted light, (ii) heterodyne detection of the received light, (iii) digital signal processing, and (iv) system operation control. The optics is also unique and capable of multi-directional transmitting and receiving with one telescope. The above-mentioned technologies contribute to the compactness and portability. The optical circuit is the fiber-based. The size of the prototype is 1100 mm * 900 mm * 800 mm. The vertical profiling of the wind direction can be realized simultaneously owing to this multi-directional optics, in addition to the profiling of the water vapor density and wind speed. Some results of the initial observation test with the prototype are shown in addition to the preliminary test with the bench-top system. It was confirmed that the water vapor density and wind speed are measured simultaneously with the measurable range of more than 500 m, range resolution of 100 m, and measurement interval of 10 minutes. The correlation between the DIAL-measured water vapor density and the one measured by an in-situ sensor is also shown.

Conference Presentation

Citation Download Citation

H. Tsuji, M. Imaki, T. Yanagisawa, K. Shigyo, and S. Kameyama "Field-deployable prototype of the 1.53-μm coherent DIAL for simultaneous vertical profiling of water vapor density and wind speed and direction", Proc. SPIE 12265, Remote Sensing of Clouds and the Atmosphere XXVII, 1226508 (28 October 2022); https://doi.org/10.1117/12.2636104

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