A Concept of Multi-Mode High Spectral Resolution Lidar Using Mach-Zehnder Interferometer
1 National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506 Japan
2 División Lidar, CEILAP, UNIDEF (MINDEF - CONICET), UMI-IFAECI-CNRS 3351, Juan Bautista de La Salle 4397 – B1603ALO Villa Martelli, Buenos Aires, Argentina
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Published online: 7 June 2016
In this paper, we present the design of a High Spectral Resolution Lidar (HSRL) using a laser that oscillates in a multi-longitudinal mode. Rayleigh and Mie scattering components are separated using a Mach-Zehnder Interferometer (MZI) with the same free spectral range (FSR) as the transmitted laser. The transmitted laser light is measured as a reference signal with the same MZI. By scanning the MZI periodically with a scanning range equal to the mode spacing, we can identify the maximum Mie and the maximum Rayleigh signals using the reference signal. The cross talk due to the spectral width of each laser mode can also be estimated.
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