Accurate thermodynamic profiling is crucial for predicting cloud developments leading to torrential rainfall. Here, we present the construction of a rotational and vibrational Raman lidar system aiming at profiling temperature and water vapor in the lower troposphere, utilizing a 266 nm laser. Our novel optical system for our rotational Raman detection incorporates a double-grating spectrometer and a linear array photomultiplier tube, which effectively shapes the spectrum and streamlines optical alignment. This design minimizes the impact of laser wavelength instability, allowing for using a non-seeded laser source. Furthermore, we enhance temperature estimation accuracy by integrating a relay lens that optimizes wavelength resolution across the optical detection and receiving systems. Our work introduces an optimized optical design for rotational Raman lidar, facilitating precise atmospheric temperature profiling.
Yabuki et al. (Thu,) studied this question.