A differential-absorption lidar for ozone sensing in the upper atmosphere-lower stratosphere

Efficient frequency doubled Raman laser at 282 nm wavelength suitable for tropospheric ozone sounding

“…For sounding of ozone in the stratosphere, laser radiation has to be weakly attenuated while travelling in the troposphere. Therefore, in this case, the optimal wavelength of on-line radiation is far from the Hartley band absorption maximum (about 260 nm [11]) and is between 300 and 310 nm (usually 308 nm radiation of an excimer XeCl laser is used) [1,8,9]. The concentration of ozone in the troposphere is sufficiently smaller than that in the stratosphere.…”

“…One of the applications requiring nonlinear optical wavelength converters is the sounding of ozone in the troposphere [1][2][3][4][5][6][7][8][9][10]. About 10% of the total amount of ozone is distributed in the troposphere.…”

Remote sensing of methane emissions by combining optical similitude absorption spectroscopy (OSAS) and lidar

“…Moreover, to achieve accurate DIAL measurements, a tunable laser, having a narrow spectral line width, is required, with a high spectral resolution detector. Hence, when applying the DIAL-methodology, limitations may occur when the spectral width of the emission laser does not match the target gas absorption line [7]. Conversely, when the absorption line width is in the same range as the laser spectral width (or even narrower than), effective absorption cross section should be taken into account.…”

Lidar Measurements of Ozone in the Upper Troposphere – Lower Stratosphere at Siberian Lidar Station in Tomsk

“…It is also important to remember about technical feasibility of spectral separation, during reception, of signals at closely lying wavelengths. To study the vertical ozone distribution in the upper troposphere -lower stratosphere, we developed and put into measurement mode a lidar, as part of SLS, for measuring the ozone concentration in the upper troposphere -lower stratosphere [7]. Sensing is performed according to the method of differential absorption and scattering at wavelength pair of 299/341 nm, which are, respectively, the first and second Stokes components of SRS conversion of 4th harmonic of Nd:YAG laser (266 nm) in hydrogen.…”