Dual-wavelength high-spectral-resolution laser radar system based on two-stage virtual image phase array

Abstract

The invention discloses a dual-wavelength high-spectral-resolution laser radar system based on a two-stage virtual image phase array. The system comprises a dual-wavelength vertical polarized light emission system, a light splitting system I, a photoelectric detector I, a telescope, a light splitting system II, a band-pass filter I, a band-pass filter II, a light splitting system III, a photoelectric detector II, a two-stage virtual image phase array system I, a light splitting system IV, a photoelectric detector III, an ICCD acquisition system I, a light splitting system V, a photoelectric detector IV, a second two-stage virtual image phase array system, a light splitting system VI, a photoelectric detector V, a ICCD acquisition system II and a time sequence controller. The system provided by the invention has a capability of detecting subsurface layer information in the sea, a phytoplankton vertical layered structure, seawater temperature salinity vertical profile distribution and a space-time change of an ocean mixed layer depth in real time, and effectively solves problems and defects in the existing sea detection technical means. And a system scheme is provided for further realizing the transparent sea.

Description

technical field [0001] The invention relates to the field of ocean optical detection, in particular to a dual-wavelength high-spectral resolution laser radar system and an inversion method based on a dual-stage virtual image phase array. Background technique [0002] 71% of the earth is covered by oceans. Ocean detection is extremely important for studying the evolution of the earth and global climate change. The ocean is also the main battlefield for national defense and national economic construction. Passive ocean color satellite remote sensing plays an irreplaceable role in observing the global carbon cycle, primary productivity, and environmental changes in the ocean and coastal zones, but this observation technology cannot provide sufficient vertical distribution structure of marine environmental parameters, nor can it perform day and night observations . With the development of laser technology, marine lidar has the advantages of high temporal and spatial resolution,...

AI Technical Summary

Problems solved by technology

However, there are still some problems with the above-mentioned system method. For example, the meter scattering lidar equation needs to assume that the lidar ratio solves the problem of two unknowns in one equation, which also leads to the inversion accuracy cannot be effectively guaranteed; in the high spectral resolution lidar system The F-P interferometer and iodine molecular absorption cell used have problems such as long scanning time, high requirements for optical path alignment, and can only be used in the 532nm band.

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