scholarly journals Remote Sensing of Atmospheric Methane with IR OPO Lidar System

Atmosphere ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 70 ◽  
Author(s):  
Semyon Yakovlev ◽  
Sergey Sadovnikov ◽  
Olga Kharchenko ◽  
Natalya Kravtsova
Keyword(s):  
Spectral Range ◽  
Spectral Band ◽  
Wavelength Region ◽  
Infrared Region ◽  
Optical Parametric Oscillators ◽  
Atmospheric Methane ◽  
Strong Absorption Band ◽  
Parametric Oscillators ◽  
Horizontal Path ◽  
Backscattered Signals

A differential absorption lidar (DIAL) system designed on the basis of optical parametric oscillators (OPO) with nonlinear KTiOAsO4 (KTA) and KTiOPO4 (KTP) crystals is described. The crystals allow laser radiation tuning in the infrared region (IR) wavelength region. The measurements in the 3.30–3.50 μm spectral range, which includes a strong absorption band of methane, are carried out. Lidar backscattered signals in the spectral band 3.30–3.50 μm has been measured and analyzed along the horizontal path in the atmosphere. Based on the experimental results, CH4 concentrations ~2.085 ppm along a 800 m surface path are retrieved in the spectral range under study with a spatial resolution of 100 m.

Optical parametric oscillators in lidar sounding of trace atmospheric gases in the mid infrared region

2015 ◽  
Author(s):  
O. A. Romanovskii ◽  
S. A. Sadovnikov ◽  
O. V. Kharchenko ◽  
V. K. Shumskii ◽  
S. V. Yakovlev
Keyword(s):  
Infrared Region ◽  
Optical Parametric Oscillators ◽  
Atmospheric Gases ◽  
Mid Infrared ◽  
Parametric Oscillators ◽  
Optical Parametric ◽  
Lidar Sounding

Optical parametric oscillators in lidar sounding of trace atmospheric gases in the 3–4 μm spectral range

2016 ◽  
Vol 25 (2) ◽  
pp. 88-94 ◽  
Author(s):  
O. A. Romanovskii ◽  
S. A. Sadovnikov ◽  
O. V. Kharchenko ◽  
V. K. Shumsky ◽  
S. V. Yakovlev
Keyword(s):  
Spectral Range ◽  
Optical Parametric Oscillators ◽  
Atmospheric Gases ◽  
Parametric Oscillators ◽  
Optical Parametric ◽  
Lidar Sounding

scholarly journals Opo lidar sounding of trace atmospheric gases in the 3 – 4 μm spectral range

2018 ◽  
Vol 176 ◽  
pp. 05016
Author(s):  
Oleg A. Romanovskii ◽  
Sergey A. Sadovnikov ◽  
Olga V. Kharchenko ◽  
Semen V. Yakovlev
Keyword(s):  
Spectral Range ◽  
Laser System ◽  
Gas Analysis ◽  
Optical Absorption Spectroscopy ◽  
Optical Parametric Oscillators ◽  
Atmospheric Gases ◽  
Parametric Oscillators ◽  
Optical Parametric ◽  
Lidar Sounding ◽  
Promising Source

The applicability of a KTA crystal-based laser system with optical parametric oscillators (OPO) generation to lidar sounding of the atmosphere in the spectral range 3–4 μm is studied in this work. A technique developed for lidar sounding of trace atmospheric gases (TAG) is based on differential absorption lidar (DIAL) method and differential optical absorption spectroscopy (DOAS). The DIAL-DOAS technique is tested to estimate its efficiency for lidar sounding of atmospheric trace gases. The numerical simulation performed shows that a KTA-based OPO laser is a promising source of radiation for remote DIAL-DOAS sounding of the TAGs under study along surface tropospheric paths. A possibility of using a PD38-03-PR photodiode for the DIAL gas analysis of the atmosphere is shown.

scholarly journals Modelling Dispersion Compensation in a Cascaded-Fiber-Feedback Optical Parametric Oscillator

Optics ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 96-102
Author(s):  
Ewan Allan ◽  
Craig Ballantine ◽  
Sebastian C. Robarts ◽  
David Bajek ◽  
Richard A. McCracken
Keyword(s):  
Pulse Propagation ◽  
Dispersion Compensation ◽  
Numerical Aperture ◽  
Tunable Laser ◽  
High Energy ◽  
Order Effects ◽  
Optical Parametric Oscillators ◽  
Fiber System ◽  
Parametric Oscillators ◽  
Optical Parametric

Fiber-feedback optical parametric oscillators (OPOs) incorporate intracavity fibers to provide a compact high-energy wavelength-tunable laser platform; however, dispersive effects can limit operation to the sub-picosecond regime. In this research article, we modeled pulse propagation through systems of cascaded fibers, incorporating SMF-28 and ultra-high numerical aperture (UHNA) fibers with complementary second-order dispersion coefficients. We found that the pulse duration upon exiting the fiber system is dominated by uncompensated third-order effects, with UHNA7 presenting the best opportunity to realise a cascaded-fiber-feedback OPO.

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