Turbulence ocean lidar
AssigneeThe Govemment of the United States ofAmerica, as represented by the Secretary of the Navy
InventorsDamien Josset, Weilin Hou
Life of this patent
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Abstract
Embodiments relate to characterizing underwater turbulence. Initially, multispectral laser light (MLL) is generated and then converted to output laser light (OLL). The OLL is received at a polarization rotator that causes the OLL to be emitted in one of multiple modes of polarization. Next, the OLL is directed toward a target medium, where the OLL causes backscattered light to be emitted from the target medium. While using the polarization rotator to switch between the multiple modes of polarization, Stokes parameters of the backscattered light are detected and then used to characterize the underwater turbulence of the target medium.
Claims15
A system for characterizing underwater turbulence, the system comprising:
- a laser pump to generate multispectral laser light (MLL);
- an optical parameteric oscillator to convert the multispectral laser light to an output laser light (OLL);
- a telescope:
- to receive the OLL at two or more Pockels cells that modulate polarization, and
- to direct the OLL toward a target medium, wherein the OLL causes backscattered light to be emitted from the target medium;
- the Pockels cells to switch between multiple modes of polarization for the OLL;
- and
- photomultiplier modules to detect Stokes parameters of the backscattered light.
A method for characterizing underwater turbulence, the method comprising:
- generating multispectral laser light (MLL);
- converting the MLL to output laser light (OLL);
- receiving the OLL at two or more Pockels cells that cause the OLL to be emitted in one of multiple modes of polarization;
- directing the OLL toward a target medium, wherein the OLL causes backscattered light to be emitted from the target medium;
- while using the Pockels cells to switch between the multiple modes of polarization, detecting Stokes parameters of the backscattered light;
- and
- characterizing the underwater turbulence of the target medium based on the Stokes parameters.
A non-transitory computer-readable medium comprising executable instructions for causing a turbulence system to:
- generate multi spectral laser light (MLL);
- convert the MLL to output laser light (OLL);
- receive the OLL at two or more Pockels cells that cause the OLL to be emitted in one of multiple modes of polarization;
- direct the OLL toward a target medium, wherein the OLL causes backscattered light to be emitted from the target medium;
- while using the Pockels cells to switch between the multiple modes of polarization, detect Stokes parameters of the backscattered light;
- and
- characterize the underwater turbulence of the target medium based on the Stokes parameters.
Dependencies are inferred from the claim text.