Ultraviolet-to-blue color-converting scintillating-fibers photoreceiver for 375-nm laser-based underwater wireless optical communication

Abstract

Underwater wireless optical communication (UWOC) can offer reliable and secure connectivity for enabling future internet-of-underwater-things (IoUT), owing to its unlicensed spectrum and high transmission speed. However, a critical bottleneck lies in the strict requirement of pointing, acquisition, and tracking (PAT), for effective recovery of modulated optical signals at the receiver end. A large-area, high bandwidth, and wide-angle-of-view photoreceiver is therefore crucial for establishing a high-speed yet reliable communication link under non-directional pointing in a turbulent underwater environment. In this work, we demonstrated a large-area, of up to a few tens of cm 2 , photoreceiver design based on ultraviolet(UV)-to-blue color-converting plastic scintillating fibers, and yet offering high 3-dB bandwidth of up to 86.13 MHz. Tapping on the large modulation bandwidth, we demonstrated a high data rate of 250 Mbps at bit-error ratio (BER) of 2.2 × 10 −3 using non-return-to-zero on-off keying (NRZ-OOK) pseudorandom binary sequence (PRBS) 2 10-1 data stream, a 375-nm laser-based communication link over the 1.15-m water channel. This proof-of-concept demonstration opens the pathway for revolutionizing the photodetection scheme in UWOC, and for non-line-of-sight (NLOS) free-space optical communication.

Luminescence and Structural Characteristics of Lead Halide Perovskite Films Deposited In Situ by a Versatile Multisource Aerosol Assisted Chemical Vapor Deposition (AACVD) Method

“…Normalized excitation spectra of the films are shown in Figure 4e and are composed by a main band peaking in the 345–400 nm range and higher energy bands associated to PbBr2 species. This type of luminescent materials and phosphors with excitation bands around 370 nm can find interesting applications benefited by the commercial availability of low‐cost high‐efficiency excitation sources, such as 365 nm GaN light emitting diodes for lightning, [ 44 ] and 375 nm lasers for underwater wireless applications, [ 45 ] to mention a few.…”

A Review on Practical Considerations and Solutions in Underwater Wireless Optical Communication

“…Inspired by these prior studies, we aim to demonstrate the fundamental potential of scintillating fibers as large-area photoreceivers for UV-based UWOC. Compared to traditional photodiodes, this would eventually improve the practicality of UWOC in actual ocean environments with a large angle of view and omnidirectional detection [101].…”

Colloidal PbS Quantum Dots for Visible-to-Near-Infrared Optical Internet of Things

“…Moreover, the solutionprocessed QDs can be easily integrated as the color-converting components by facile and standard fabrication techniques, e.g. spin-coating, drop-coating, or fiber-pulling methods for emerging components required in high-bit-rate communication channels, such as phosphor for microLEDs [22] and luminescent fibers for photodetection [4], [23].…”