Real-time observation of frequency Bloch oscillations with fibre loop modulation

Hao Chen; NingNing Yang; Chengzhi Qin; Wenwan Li; Bing Wang; Tianwen Han; Chi Zhang; Weiwei Liu; Kai Wang; Hua Long; Xinliang Zhang; Peixiang Lu

doi:10.1038/s41377-021-00494-w

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Real-time observation of frequency Bloch oscillations with fibre loop modulation

Articles

- Real-time observation of frequency Bloch oscillations with fibre loop modulation
- Light: Science & Applications Vol. 10, Issue 3, Pages: 434-442(2021)
- Affiliations：
  
  School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
- Author bio：
  
  Bing Wang (wangbing@hust.edu.cn)
  Chi Zhang (chizheung@hust.edu.cn)
  Peixiang Lu (lupeixiang@hust.edu.cn)
- Funds：
- DOI：10.1038/s41377-021-00494-w
  CLC：
- Published：2021，
  
  Published Online：05 March 2021，
  
  Received：16 October 2020，
  
  Revised：09 February 2021，
  
  Accepted：15 February 2021
- Accepted：
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Chen, H. et al. Real-time observation of frequency Bloch oscillations with fibre loop modulation. Light: Science & Applications, 10, 434-442 (2021).
DOI：

Chen, H. et al. Real-time observation of frequency Bloch oscillations with fibre loop modulation. Light: Science & Applications, 10, 434-442 (2021). DOI： 10.1038/s41377-021-00494-w.

摘要

Abstract

Bloch oscillations (BOs) were initially predicted for electrons in a solid lattice to which a static electric field is applied. The observation of BOs in solids remains challenging due to the collision scattering and barrier tunnelling of electrons. Nevertheless

analogies of electron BOs for photons

acoustic phonons and cold atoms have been experimentally demonstrated in various lattice systems. Recently

BOs in the frequency dimension have been proposed and studied by using an optical micro-resonator

which provides a unique approach to controlling the light frequency. However

the finite resonator lifetime and intrinsic loss hinder the effect from being observed practically. Here

we experimentally demonstrate BOs in a synthetic frequency lattice by employing a fibre-loop circuit with detuned phase modulation. We show that a detuning between the modulation period and the fibre-loop roundtrip time acts as an effective vector potential and hence a constant effective force that can yield BOs in the modulation-induced frequency lattices. With a dispersive Fourier transformation

the pulse spectrum can be mapped into the time dimension

and its transient evolution can be precisely measured. This study offers a promising approach to realising BOs in synthetic dimensions and may find applications in frequency manipulations in optical fibre communication systems.

关键词

Keywords

references

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