Single-line-extracted pure rotational Raman lidar to measure atmospheric temperature and aerosol profiles

US10620318B2 · kind B2 · utility

Assignee

• Wuhan University · CN

Inventors

• Fan Yi · Nanhu, CN
• Miao Weng · 红钢城街道, CN
• Fuchao Liu · 红钢城街道, CN
• Yunpeng Zhang · 红钢城街道, CN
• Changming Yu · 红钢城街道, CN
• Yujin He · 红钢城街道, CN
• Ying Tan · Sugar Land, US
• Yang Yi · Allen, US
• Xiangliang Pan · 红钢城街道, CN

Key dates

• Filing date: May 21, 2017
• Grant date: Apr 14, 2020
• Expiry date: Feb 16, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02A90/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A single-line-extracted pure rotational Raman lidar system, including: a transmitter unit configured to emit extremely narrow-band laser light that is guided into atmosphere zenithward; a receiver unit configured to collect backscattered signals from the atmosphere; and a data acquisition and control unit configured to deliver data and guarantee automatic operation of the lidar system orderly. The transmitter unit employs a powerful injection-seeded Nd: YAG laser to emit 532.23 nm laser beam with a pulse energy of approximately 800 mJ, a repetition rate of 30 Hz and linewidth of <0.006 cm−1. The lidar system has an optical bandwidth of approximately 30 pm for the two Raman channels and an optical bandwidth of 0.3 nm for an elastic channel, as well as a field of view of approximately 0.4 mrad. The two Raman channels extract the N2 anti-Stokes pure rotational Raman line signals with J=6 and 16, respectively.