A differential absorption lidar system (DIAL) based on a continuously tunable optical parametric amplifier (OPA) pumped by a Nd:YAG laser (200 mJ at lambda = 355 nm) operating at a maximum pulse repetition rate of 100 Hz has been developed, The system provides continuously tunable coherent radiation in the Visible-near IR range (0.4-2.5 mum). allowing to perform DIAL measurements in a spectral region where most of atmospheric constituents and pollutants display absorption lines. The spectral width of the OPA system is line-narrowed by using a master oscillator dye laser as seeder, achieving a linewidth of 0.04 cm(-1) (FWHM), a spectral purity larger than 99% and a frequency stability better than 1 pm h(-1), with an output energy in the IR of 1-10 mJ. The OPA system was used to perform DIAL measurements in the lower troposphere. Preliminary results in terms of water vapor content and aerosol backscattering profiles are presented and discussed.
Development of a tunable IR lidar system / Amoruso, Salvatore; A., Amodeo; M., Armenante; A., Boselli; L., Mona; M., Pandolfi; G., Pappalardo; Velotta, Raffaele; Spinelli, Nicola; X., Wang. - In: OPTICS AND LASERS IN ENGINEERING. - ISSN 0143-8166. - ELETTRONICO. - 37:5(2002), pp. 521-532. [10.1016/S0143-8166(01)00115-4]
Development of a tunable IR lidar system
AMORUSO, SALVATORE;VELOTTA, RAFFAELE;SPINELLI, NICOLA;
2002
Abstract
A differential absorption lidar system (DIAL) based on a continuously tunable optical parametric amplifier (OPA) pumped by a Nd:YAG laser (200 mJ at lambda = 355 nm) operating at a maximum pulse repetition rate of 100 Hz has been developed, The system provides continuously tunable coherent radiation in the Visible-near IR range (0.4-2.5 mum). allowing to perform DIAL measurements in a spectral region where most of atmospheric constituents and pollutants display absorption lines. The spectral width of the OPA system is line-narrowed by using a master oscillator dye laser as seeder, achieving a linewidth of 0.04 cm(-1) (FWHM), a spectral purity larger than 99% and a frequency stability better than 1 pm h(-1), with an output energy in the IR of 1-10 mJ. The OPA system was used to perform DIAL measurements in the lower troposphere. Preliminary results in terms of water vapor content and aerosol backscattering profiles are presented and discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
