A CONCEPT OF MULTI-MODE HIGH SPECTRAL RESOLUTION LIDAR USING MACH-ZEHNDER INTERFEROMETER

YOSHITAKA JIN; PABLO RISTORI; TOMOAKI NISHIZAWA; NOBUO SIGIMOTO; LIDIA ANA OTERO

EPJ Web of Conferences, Vol. 119, 02006. The 27th International Laser Radar Conference

Editors: B. Gross, F. Moshary and M. Arend.

Año: 2016 vol. 119

In thispaper, we designed a High Spectral Resolution Lidar (HSRL) using a laser thatoscillates in a multi-longitudinal mode. Rayleigh and Mie scattering componentsare separated using a Mach-Zehnder Interferometer (MZI) with the same freespectral range (FSR) as the transmitted laser. The transmitted laser light ismeasured as a reference signal with the same MZI. By scanning the MZIperiodically with a scanning range equal to the mode spacing, we can identifythe 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 beestimated. We present some simulation results related to the selection of thetransmission laser. The optimal laser has shorter resonator length, shorterpulse length, and less beam divergence.