A non-volatile bipolar optical fiber memory based on phase change materials

Jiapeng Sun; Hanyang Li; Yu Zhang; Jinhua Mou; Jiaxing Gao; Zhihai Liu

doi:10.1117/12.3005225

21 December 2023 A non-volatile bipolar optical fiber memory based on phase change materials

Jiapeng Sun, Hanyang Li, Yu Zhang, Jinhua Mou, Jiaxing Gao, Zhihai Liu

Proceedings Volume 12966, AOPC 2023: AI in Optics and Photonics ; 1296609 (2023) https://doi.org/10.1117/12.3005225
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

All-photon memory, holding significant potential for applications in optical communication systems and neural network computing, and developing an all-optical dual-channel fiber storage platform that achieves integrated storage and computation is challenging. In this paper, a non-volatile, high-contrast, and highly repeatable bipolar memory is demonstrated, achieved by integrating two tapered fibers with a fiber microsphere containing phase change materials(PCMs). Employing an external laser modulation technique, repeatable or randomly accessible 6-level data storage is enabled by altering the state of Ge₂Sb₂Te₅ (GST). Multi-stage writing is accomplished using a 532 nm pump laser witha10 ns pulse width and laser energy ranging from 0.423 mJ to 1.206 mJ, while a 793 nm continuous wave (CW) laser with an average power of 4 mW to 11 mW is utilized for the multi-stage reset process. Exhibiting a write response time of 75ns, a reset response time of 180 ns, and a contrast of 18 dB, the bipolar memory preliminarily realizes the synaptic weight update mechanism in the synapse of neural network systems

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jiapeng Sun, Hanyang Li, Yu Zhang, Jinhua Mou, Jiaxing Gao, and Zhihai Liu "A non-volatile bipolar optical fiber memory based on phase change materials", Proc. SPIE 12966, AOPC 2023: AI in Optics and Photonics , 1296609 (21 December 2023); https://doi.org/10.1117/12.3005225

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KEYWORDS

Microspheres

Modulation

Optical fibers

Neural networks

Pulsed laser operation

Optical transmission

Fiber lasers

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