Abstract

The parameters of an echo signal from the underwater lidar are studied for the case of modulation of a probing pulse by a high frequency signal with a frequency linearly varying with time. The analysis is based on the statistical Monte Carlo simulations of the frequency and phase responses of a signal propagating along the emitter–water–reflector–water–receiver path and an analytical representation of the signal as a pulse described by a Gaussian function with intrapulse modulation. Delays and pulse shape changes caused by temporal dispersion of the photon-density waves are estimated. It is shown that the temporal dispersion effect reduces the efficiency of the matched processing of a complex signal in the receiving system.

© 2019 Optical Society of America

Backscatter signals in underwater lidars: temporal and frequency features

Alexander G. Luchinin, Mikhail Yu. Kirillin, and Lev S. Dolin
Appl. Opt. 57(4) 673-677 (2018)

Nonstationary optical transfer functions of underwater imaging systems

Alexander G. Luchinin and Mikhail Yu. Kirillin
Appl. Opt. 56(27) 7518-7524 (2017)

Temporal and frequency characteristics of a narrow light beam in sea water

Alexander G. Luchinin and Mikhail Yu. Kirillin
Appl. Opt. 55(27) 7756-7762 (2016)

Comparative evaluation of signal-to-noise ratio and resolution of underwater imaging systems with artificial illumination

Alexander G. Luchinin, Lev S. Dolin, and Mikhail Yu. Kirillin
Appl. Opt. 57(21) 6083-6088 (2018)

Autoquenching of spherical photon density waves during propagation in a turbid medium

Alexander G. Luchinin, Mikhail Yu. Kirillin, and Lev S. Dolin
Appl. Opt. 61(22) 6492-6497 (2022)