Indirect spectrum measurement via random phase modulation and detection in temporal domain

Author:

Xu Yao-Kun1,Zhang Er-Feng2,Sun Shi-Hai3,Sun Shuai1,Liu Wei-Tao1ORCID

Affiliation:

1. Hunan Key Laboratory of Mechanism and Technology of Quantum Information

2. SSF Information Engineering University

3. Sun Yat-Sen University

Abstract

Spectroscopy continues to provide possibilities for a deeper understanding of fundamental physical phenomena. Traditional spectral measurement method, dispersive Fourier transformation, is always limited by its realization condition (detection in the temporal far-field). Inspired by Fourier ghost imaging, we put forward an indirect spectrum measurement to overcome the limitation. The spectrum information is reconstructed via random phase modulation and near-field detection in the time domain. Since all operations are realized in the near-field region, the required length of dispersion fiber and optical loss are greatly reduced. Considering the application in spectroscopy, the length of required dispersion fiber, the spectrum resolution, the range of spectrum measurement and the requirement on bandwidth of photodetector are investigated.

Funder

Research Program of National University of Defense Technology

National Natural Science Foundation of China

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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