Abstract
In the free-space optical (FSO) communication system, alignment and coupling are key issues. In this work, we adopt a PIN photodiode board as the new receiver to address this question. Firstly, with rapid thermochemical vapor deposition (RTCVD) and solar cell technology, the PIN photodiode board is manufactured. Then, using scanning electron microscope (SEM) and transmission electron microscope (TEM), the microphotographs of the PIN photodiode are taken. After that, the PIN board is arranged as a new receiver in the FSO system to do a bit error rate (BER) experiment. In total, we have carried out 4 groups of experiments. The BERs of the ordinary receiver are as follows: (10−8.5, 10−8, 10−8, and 10−7.9) and that of the new receiver is (10−9.2, 10−9.1, 10−9.1, and 10−9), respectively. It means the BER of the new receiver is lower. In other words, the new receiver performs better.
Highlights
free-space optical (FSO) communication has attracted growing interests of scholars and researchers because of its advantages such as fast transmission rate and wide space coverage
Optical fiber transmits the optical signals to PIN/avalanche photodiode (APD) diodes, where the optical signal is converted to an electrical signal
In [2], an adaptive digital combination algorithm for coherent FSO communication based on binary phase-shift keying (BPSK) and orthogonal phase-shift keying (QPSK) modulation is proposed to eliminate the time-consuming and complex estimation process of random time-varying channel fading
Summary
FSO communication has attracted growing interests of scholars and researchers because of its advantages such as fast transmission rate and wide space coverage. In [3], the performance of FSO communication system using a PIN photodiode receiver for M-element phase-shift keying (PSK) is evaluated under the situation of strong non-Kolmogorov atmospheric turbulence. In [5], the performance of multiband phase shift keying (PSK) SIM communication system using PIN photodiode receivers is evaluated under strong non-Kolmogorov atmospheric turbulence with Gauss beam as an excitation source. Since the PIN board can convert the optical signal into electrical signal directly, the coupling of light-into-fiber is not needed. E feature of our work is adopting solar cell technology to produce the PIN board. We work with the technicians of Zhejiang Anxun Solar Energy Technology Co., Ltd. to produce the PIN board. After the sample of the PIN board is produced, its I–V curves are tested. en, it is arranged in FSO system to do the experiment. e experimental result shows its BER is lower than that of the traditional receiver
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