Transmitting characteristics of polarization information under seawater

Abstract

We have presented the performance evaluation for light communication under water based on polarization information. In particular, we focused on the transmitting characteristics of the polarized lights under different conditions of water types and link distances. The trajectories of transmitted photons propagating in a water channel can be simulated based on the Monte Carlo (MC) algorithm. The simulated results demonstrate that the intensity of the polarized light after being transmitted underwater decreases sharply as the transmission distance increases, but the degree of polarization (DoP) of the transmitted lights remains above 0.75. The polarization retrieve (PR) method is used for reducing the scattering impact on the DoP of the light, and the maximal enhancement of the linear degree of polarization (LDoP) can be obtained as about 16%. Meanwhile, the modified PR method with a different retrieval Mueller matrix (RMM) derived from different distances (l) of the transmission channel has also been investigated, which shows that the retrieval accuracy will be enhanced with the increase of transmission distance of the RMM.

Broad-Band Transmission Characteristics of Polarizations in Foggy Environments

“…Firstly, we constructed a simple scattering environment that is composed of a single type of scattering particle with a size of 1µm and which demonstrates a visibility value of V = 800 m. Based on the MC model [15][16][17][18][19][20], we simulated the multi-spectral forward DoP evolutions of different types of polarized incidences, including those of LPL and CPL, in the constructed foggy system, as the function of the transmission length of L. The results are shown in Figure 2. In this scattering environment, we can observe that all of the DoPs decrease gradually with increasing length (L) for all of the incident wavelengths from visible to infrared light, but the decreasing extents are different.…”

“…In our previous study, we investigated polarization characteristics under different medium conditions and proposed a new recovery method for the transmitted polarization information [14][15][16][17][18][19][20]. Our former works were mainly focused on characteristics in the visible band.…”

Depolarization Characteristics of Different Reflective Interfaces Indicated by Indices of Polarimetric Purity (IPPs)

“…As a famous geometrical optics model, the Torrance–Sparrow (T-S) model [ 15 ] has been widely investigated and expanded to the polarized BRDF (pBRDF) models [ 16 , 17 , 18 , 19 , 20 , 21 ]. The Monte Carlo (MC) method has also been introduced to solve the composition of samples in fusion devices or reactive plasmas and a series of cases about polarization information [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ], especially in photons tracking [ 24 , 25 , 29 , 30 ]. Wang et al have combined the MC model with BRDF, giving birth to a flexible method to acquire the reflective polarization information from a rough surface [ 34 ].…”

Pseudo-polarimetric Method for Dense Haze Removal

“…However, these previous polarimetric dehazing methods require the acquisition of two or even more images at different polarization states. This could hamper the application of online (or real-time) image dehazing and may need a special imaging sensor or configuration [21]- [23], and we believe that the method based on one single captured image can overcome these limitations to facilitate the dehazing.…”