Adaptive and secure VCSEL FSO based on simple dual-polarized architecture for short distance transmission

Abstract

In this study, using dual-polarized-multiplexing VCSEL based free space optical (FSO) transmission system is demonstrated experimentally. Two orthogonal polarizers (POLs), a beam splitter (BS) and a reflected mirror (M) are applied in the FSO transmitter (Tx) side to combine dual FSO signals into one for data security without code encryption. In the receiver (Rx) side, two blended FSO channels can be decoded adaptively by applying a POL with properly polarization status. Furthermore, when we add two corresponding POLs with orthogonal polarization in the Rx side, the FSO capacity also can double by the presented dual-polarized FSO architecture. Here, the relationships of the detected FSO powers and rotating angle between two POLs are also experimentally discussed.

Spectrum-dependent image convolutional processing via a 2D polarization-sensitive photodetector

“…This anisotropy introduces a novel dimension to the information carried by light, offering substantial potential applications in the transmission, acquisition, and analysis of optical information 1,2,3,4 . Examples include material structure anisotropy assessment 5,6,7 , optical anisotropy analysis of objects 8,9,10,11 , enhancement of data transmission bandwidth and security 12,13 . These applications find significant advantages in various fields such as material characterization, polarization imaging, optical communication, and remote sensing 14,15,16,17 .…”

Spectrum-Dependent Image Convolutional Processing via a Two-Dimensional Polarization-Sensitive Photodetector

“…1−4 These applications include assessment of material structure anisotropy, 5−7 optical anisotropy analysis of objects, 8−11 and enhancement of data transmission bandwidth and security. 12,13 These applications have advantages in various fields such as polarization imaging, optical communication, and remote sensing. 14−17 To harness the advantages of polarized light, a specialized design of polarization-sensitive photodetectors is essential in the field of optoelectronic imaging.…”

“…Natural light is isotropic and polarized light is anisotropic in different vibration directions. This anisotropy of polarized light introduces an additional dimension to the information carried by light, presenting substantial potential applications in the transmission, acquisition, and analysis of optical information. − These applications include assessment of material structure anisotropy, − optical anisotropy analysis of objects, − and enhancement of data transmission bandwidth and security. , These applications have advantages in various fields such as polarization imaging, optical communication, and remote sensing. − To harness the advantages of polarized light, a specialized design of polarization-sensitive photodetectors is essential in the field of optoelectronic imaging. , Among various types of photodetectors, polarization-sensitive photodetectors fabricated from anisotropic two-dimensional (2D) semiconductors offer high sensitivity for polarized photodetection . Additionally, they offer low power consumption, compact size, and high integration without requiring a preceding polarizing grating structure .…”