Inverse Design of Incoherent Raman Pump Sources for U-Band WDM Transmission Over 125 km G.652.D Fiber

IF 2.1 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Journal Pub Date : 2024-09-03 DOI:10.1109/JPHOT.2024.3453870

Tangyanjun Lan;Junjiang Xiang;Gai Zhou;Meng Xiang;Songnian Fu;Yuwen Qin

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引用次数: 0

Abstract

The ever-increasing demand for the transmission capacity has stimulated intensive investigations, in terms of both new transmission window of standard single mode fiber (SSMF) and new fiber utilizing the spatial domain. Multi-band wavelength division multiplexing (WDM) transmission exploring the extended wavelength band, besides traditional C+L band, is an attractive solution for the rapid and cost-effective enhancement of transmission capacity. To this end, here we demonstrate the U-band WDM transmission over 125-km G.652.D fiber, when the C-band amplified spontaneous emission (ASE) source acts as the incoherent pump for Raman amplification (RA). Meanwhile, bidirectional long short-term memory neural network (BiLSTM-NN) is applied to inversely design the spectral shape of two C-band ASE sources. After the optimization through inverse design, the ROP variation at the U-band can be less than 1.2 dB under different net Raman gains. Consequently, we can experimentally achieve a net Raman gain of ∼15 dB over a 3 dB bandwidth of around 2.1 THz at the U-band, under the condition of distributed bidirectional Raman pump configuration. Finally, the performance of the U-band RA is experimentally verified by transmitting three-wavelength 20 GBaud DP-QPSK signals, when the threshold of 7% HD-FEC can be successfully reached.

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反向设计用于 125 千米 G.652.D 光纤 U 波段波分复用传输的非相干拉曼泵浦源

对传输容量不断增长的需求激发了对标准单模光纤（SSMF）新传输窗口和利用空间域的新型光纤的深入研究。除了传统的 C+L 波段外，探索扩展波段的多波段波分复用（WDM）传输是一种极具吸引力的解决方案，可快速、经济地提高传输容量。为此，我们在此演示了 125 千米 G.652.D 光纤上的 U 波段波分复用传输，此时 C 波段放大自发辐射（ASE）源充当拉曼放大（RA）的非相干泵浦。同时，应用双向长短期记忆神经网络（BiLSTM-NN）对两个 C 波段 ASE 源的光谱形状进行反向设计。经过反设计优化后，在不同的净拉曼增益下，U 波段的 ROP 变化可小于 1.2 dB。因此，在分布式双向拉曼泵配置的条件下，我们可以在 U 波段约 2.1 THz 的 3 dB 带宽上实验实现 ∼15 dB 的净拉曼增益。最后，通过传输三波长 20 GBaud DP-QPSK 信号，实验验证了 U 波段 RA 的性能，成功达到了 7% HD-FEC 的阈值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Photonics Journal ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

4.50

自引率

8.30%

发文量

489

审稿时长

1.4 months

期刊介绍： Breakthroughs in the generation of light and in its control and utilization have given rise to the field of Photonics, a rapidly expanding area of science and technology with major technological and economic impact. Photonics integrates quantum electronics and optics to accelerate progress in the generation of novel photon sources and in their utilization in emerging applications at the micro and nano scales spanning from the far-infrared/THz to the x-ray region of the electromagnetic spectrum. IEEE Photonics Journal is an online-only journal dedicated to the rapid disclosure of top-quality peer-reviewed research at the forefront of all areas of photonics. Contributions addressing issues ranging from fundamental understanding to emerging technologies and applications are within the scope of the Journal. The Journal includes topics in: Photon sources from far infrared to X-rays, Photonics materials and engineered photonic structures, Integrated optics and optoelectronic, Ultrafast, attosecond, high field and short wavelength photonics, Biophotonics, including DNA photonics, Nanophotonics, Magnetophotonics, Fundamentals of light propagation and interaction; nonlinear effects, Optical data storage, Fiber optics and optical communications devices, systems, and technologies, Micro Opto Electro Mechanical Systems (MOEMS), Microwave photonics, Optical Sensors.