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arXiv · 2312.11968

Multi-color nonreciprocal optical amplifier with spinning active optomechanics

Ru-Ting Sun·Mei-Yu Peng·Tian-Xiang Lu·Ya-Feng Jiao·Jie Wang·Qian Zhang·Hui Jing
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Abstract

We propose to achieve a multi-color nonreciprocal optical amplifier, a crucial device in optical communication and information processing, by spinning an active resonator. We show that in such a device, due to the interplay of the Sagnac effect and the optical gain, nonreciprocal signal {amplification} can be realized, accompanied by a giant enhancement of optical group delay from $0.3\;\mathrm{ms}$ to $35\;\mathrm{ms}$ in a chosen direction, which is otherwise unattainable in a passive device. Also, coherent amplification of higher-order optical sidebands and a slow-to-fast light switch can be achieved by tuning both the pump power and the spinning velocity. Our work provides a unique and accessible way, well-compatible with other existing techniques, to realize multi-color nonreciprocal optical amplifiers for more flexible control of optical fields.

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Ru-Ting Sun, Mei-Yu Peng, Tian-Xiang Lu, Ya-Feng Jiao, Jie Wang, Qian Zhang, Hui Jing. 2023-12-19. Multi-color nonreciprocal optical amplifier with spinning active optomechanics. https://arxiv.org/abs/2312.11968

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