Optical and Quantum Electronics ( IF 3 ) Pub Date : 2021-04-30 , DOI: 10.1007/s11082-021-02948-2 Paulomi Mandal , Khaleda Mallick , Saikat Santra , Bibhatsu Kuiri , Bubai Dutta , Ardhendu Sekhar Patra
A scheme for transportation of information with minimum Rayleigh backscattering (RB) noise to the multi-users by employing Qdash laser diode as a source is designed and evaluated. In this paper, employing digital phase shift keying, millimeter wave, 16-quadrature amplitude modulation orthogonal frequency division multiplexing (16-QAM OFDM), and 32-QAM OFDM techniques, the data rates of 4 × 10 Gbps are transmitted simultaneously over 50 km single mode fiber, plus 15 m wireless link, 50 m free space optical (FSO) link, 10 m wireless respectively. Four selective self-injection locked modes of Qdash laser are utilized as optical carriers for downstream and upstream transmission. To ensure the matter of mitigation of RB noise, which mainly arises due to the transmission of light-wave of same wavelengths in bidirectional transportation, the carrier signals of different wavelength are used for modulation and remodulation in optical line terminal and optical network unit. Besides being a strong support to increase the tolerance level against RB noise, this architecture is capable to transmit less noisy information wirelessly in radio frequency sensitive areas too. The constancy of the proposed architecture is evaluated by very low power penalty (~ 1.5–1.7 dB, ~ 2.4–2.6 dB, ~ 1.4–1.6 dB, ~ 1.7–1.8 dB for four channels respectively), clear constellation, prominent eye opening, low bit-error-rate (< 10–9 for pseudo random bit sequence data stream and < 3.8 × 10–3 for OFDM signal) and low error vector magnitude (< 12.4% for 16 QAM, < 10% for 32 QAM). Therefore, the proposed architecture could be promising alternative not only due to the scheme for mitigation of RB noise but also be a potent in the field of applications of the communication world to provide less noisy information to the multi-users (wired/wireless/FSO).
中文翻译:
基于消除瑞利背向散射噪声技术的,采用自注入锁定Qdash激光源的双向混合WDM-OFDM网络,用于多业务通信
设计并评估了一种以Qdash激光二极管为源,将具有最小瑞利背向散射(RB)噪声的信息传输给多用户的方案。本文采用数字相移键控,毫米波,16正交调幅正交频分复用(16-QAM OFDM)和32-QAM OFDM技术,在50 km上同时传输4×10 Gbps的数据速率单模光纤,再加上15 m无线链路,50 m自由空间光纤(FSO)链路,以及10 m无线。Qdash激光器的四种选择性自注入锁定模式被用作下游和上游传输的光学载体。为了确保减轻RB噪声,该噪声主要是由于双向传输中相同波长的光的传输引起的,不同波长的载波信号用于光线路终端和光网络单元中的调制和再调制。除了为增加对RB噪声的容忍度提供了有力的支持外,该体系结构还能够在射频敏感区域内无线传输较少的噪声信息。通过非常低的功率损失(分别针对四个通道的〜1.5–1.7 dB,〜2.4–2.6 dB,〜1.4–1.6 dB,〜1.7–1.8 dB),清晰的星座图,明显的睁眼,低误码率(<10 这种架构也能够在射频敏感区域无线传输较少的噪声信息。通过非常低的功率损失(分别针对四个通道的〜1.5–1.7 dB,〜2.4–2.6 dB,〜1.4–1.6 dB,〜1.7–1.8 dB),清晰的星座图,明显的睁眼,低误码率(<10 这种架构也能够在射频敏感区域无线传输较少的噪声信息。通过非常低的功率损失(分别针对四个通道的〜1.5–1.7 dB,〜2.4–2.6 dB,〜1.4–1.6 dB,〜1.7–1.8 dB),清晰的星座图,明显的睁眼,低误码率(<10–9对于伪随机比特序列数据流,<3.8×10 –3对于OFDM信号)和低误差矢量幅度(对于16 QAM是<12.4%,对于32 QAM是<10%)。因此,所提出的架构不仅可以由于减轻RB噪声的方案而成为有希望的替代方案,而且在通信领域的应用领域中可以有效地向多用户提供更少的噪声信息(有线/无线/ FSO)也可以成为有希望的替代方案。 )。