Record 22-dB Net Gain of Broadband Single-Mode Cr-Doped Crystalline Core Fiber by AI-Assisted Image Recognition Growth

A record net gain of 22-dB and improved twice gain-per-unit length (GPUL) of 110 dB/m in a 13-μm core, 20-cm length, and 300-nm broadband single-mode Cr-doped crystalline core fibers (CCFs) are demonstrated by AI-assisted image recognition growth. The gain is significantly higher compared to the pre...

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Bibliographic Details
Published in:Journal of lightwave technology 2024-04, Vol.42 (8), p.2971-2977
Main Authors: Liu, Chun-Nien, Chang, Kai-Chieh, Tsai, Chia-Ling, Huang, Chien-Wei, Shih, Tien-Tsorng, Huang, Sheng-Lung, Cheng, Wood-Hi
Format: Article
Language:English
Subjects:
AI-assisted growth
Brightness
Broadband
Chromium
Diameters
fiber amplifier
Fiber lasers
Gain
High gain
Image recognition
Luminance
net gain
Optical fiber amplifiers
Optical fiber communication
Optical fiber polarization
smaller core diameter
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Summary:A record net gain of 22-dB and improved twice gain-per-unit length (GPUL) of 110 dB/m in a 13-μm core, 20-cm length, and 300-nm broadband single-mode Cr-doped crystalline core fibers (CCFs) are demonstrated by AI-assisted image recognition growth. The gain is significantly higher compared to the previous core of 25-μm. Both high gain and GPUL are achieved thanks to a novel AI-assisted, image recognition applied to the precise control of the molten zone with luminance of 2.39 cd/m 2 for fabricating smaller core diameter of 13-μm. The AI-assisted growth is performed by capturing images of the molten zone, RGB image recognition, luminance calculation, and real-time luminance adjustment within required value. The gain of several core diameters and fiber lengths has been thereafter simulated, which agrees with measured result. The smaller core of 13-μm exhibits higher coupling efficiency that is 65% the previous core of 25-μm. A lower noise figure of 4.2-dB is also obtained. In this study, the proposed CDFs looks promising for broadband fiber amplifiers.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2023.3342931