Laser & Optoelectronics Progress, Volume. 58, Issue 23, 2306005(2021)
Dynamic Probabilistic Shaping Technique Based on Intensity Modulation Direct Detection System
In classic optical communication, intensity modulation direct detection (IM-DD) is a low-power (amplitude) system with no amplifier in the intermediate. Therefore, increasing the channel capacity becomes a challenge of signal space size and distribution at given bandwidth and maximum power (amplitude). The problem of limited power is solved by proposing a dynamic probabilistic shaping (DPS) algorithm based on the IM-DD system, which improves the system's channel capacity and bit error performance. The pulse amplitude modulation (PAM) format is used in this investigation. DPS can increase channel capacity by approximately 0.9 dB and improve bit error performance by 0.8 dB and 1 dB in PAM4 and PAM8, respectively, according to simulation data.
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Lijie Zhang, Qi Sui. Dynamic Probabilistic Shaping Technique Based on Intensity Modulation Direct Detection System[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2306005
Category: Fiber Optics and Optical Communications
Received: Mar. 2, 2021
Accepted: Apr. 9, 2021
Published Online: Nov. 18, 2021
The Author Email: Sui Qi (sui-qi@hotmail.com)