Development of a compact solid-state laser sensor for detecting distributed, low-concentration widely environmental-pollution molecules

开发紧凑型固态激光传感器，用于检测分布、低浓度、广泛的环境污染分子

• 批准号: 12558058
• 负责人: KOBAYASHI Takao
• 金额: $ 6.53万
• 依托单位: Fukui University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12558058/
• 关键词: Atmospheric minor molecules; Long-path absorption laser radar; LD pumped OPO; Infrared wavelength; Widely frequency tunable; Topographic target; 差分吸収レーザレーダー; マイクロチップレーザー; 光パラメトリック発振器; 環境汚染ガス; 温室効果ガス; レーザーレーダー; 吸収分光; 微量分子センサー

In this research, a long-path absorption laser system has been developed as a remote sensor of low-concentration atmospheric molecules related to environmental pollution and global warming issues. The compact optical parametric oscillator (OPO) has been constructed for generating tunable infrared pulse beam of 20ns pulse width, 1〜10kHz pulse repetition frequency, 175MHz spectral width, 10〜150mW average power with single and stabilized frequency in the wavelength range of 1.50〜1.93μm and 2.36〜3.68μm. Using the long-path absorption laser radar, the atmospheric methane has been measured using a rough-surface topographic target at 150m range with the signal-to-noise ratio of 100, and the absorption accuracy of 10^<-2> in 1s integration time.Further improvement is possible in the system characteristics by increasing the laser efficiency and reducing the system noise to realize estimated ideal performance. Other molecules such as CO_2 and N_2O are possible to be detected with this system scheme.Application field of this sensor system covers 1) measurement of wide-area molecular density and spatial integrated height distribution using proper targets over the traffic loads, factories, airports and urban area, 2) new mobile systems based on a compact car and airplane are possible to measure transport characteristics of global air pollution and atmospheric environmental properties In a higher pulse energy model

在本研究中，已开发出一种长路径吸收激光系统，作为与环境污染和全球变暖问题相关的低浓度大气分子的遥感器。研制了一种紧凑型光学参量振荡器（OPO），可在1.50 ~ 1.93μm和2.36 ~ 3.68μm波长范围内产生脉宽20 ns、重复频率1 × 10 kHz、谱宽175 MHz、平均功率10 × 150 mW的单频和稳频可调谐红外脉冲光束。利用长光程吸收激光雷达，在150 m距离上对粗糙表面地形目标进行了大气甲烷的测量，信噪比为100，积分时间为1 s时的吸收精度为10 μ s<-2>，通过提高激光效率和降低系统噪声，可以进一步改善系统特性，实现预期的理想性能。该传感器系统的应用领域包括：（1）利用合适的目标测量交通负荷、工厂、机场和城市区域的大面积分子密度和空间积分高度分布;（二）基于小型汽车和飞机的新的移动的系统有可能在更高的脉冲中测量全球空气污染的传输特性和大气环境特性能量模型

项目成果

T.Kobayashi, Y.Mizoguchi, T.Matsumura, S.Kawato: "Development of compact direct-detection Doppler lidar system for wind profiling"Proc. of SPIE's Third International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space. 329-3

T.Kobayashi、Y.Mizoguchi、T.Matsumura、S.Kawato：“用于风廓线分析的紧凑型直接探测多普勒激光雷达系统的开发”Proc。

D.Shen,T.Kobayashi: "Periodically poled MgO : LiNbO_3 optical parametric oscillator pumped by a single-frequency passively Q-switched microchip Nd : YAG laser"Technical Digest of Conference on Lasers and Electro-Optics. CThH2. 425 (2000)

D.Shen，T.Kobayashi：“单频被动调Q微芯片Nd：YAG激光器泵浦的周期性极化MgO：LiNbO_3光学参量振荡器”激光与电光会议技术文摘。

M. Imaki, D. Sun and T. Kobayashi: "Direct detection Doppler lidar for two dimensional wind field measurements of the troposphere"Proc. Of SPIE's Third International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space. (2002

M. Imaki、D. Sun 和 T. Kobayashi：“用于对流层二维风场测量的直接检测多普勒激光雷达”Proc。

D.Sun, S.Kawato, T.Kobayashi: "Ultraviolet Rayleigh Lidar for Wind and Temperature Measurements"Optical Review. Vol.7・No.6. 555-560 (2000)

D.Sun、S.Kawato、T.Kobayashi：“用于风和温度测量的紫外线瑞利激光雷达”光学评论第 7 卷·第 6 期（2000 年）。

D.Shen,S.Tam,T.Kobayashi: "Diode-Pumped Passively Q-switched Single-Frequency Nd : YAG Lasers"Optical Review. Vol7,5. 451-454 (2000)

D.Shen、S.Tam、T.Kobayashi：“二极管泵浦被动 Q 开关单频 Nd：YAG 激光器”光学评论。