Ms. Ting Yang Profile

Ting Yang

at BeiHang Univ

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Proceedings Article | 19 December 2013 Paper

A laser frequency and power control system in an atomic Talbot-Lau interferometer

Ting Yang, Zhaohui Hu, Lu Qi

Proceedings Volume 9046, 90460Z (2013) https://doi.org/10.1117/12.2036643

KEYWORDS: Chemical species, Interferometers, Bragg cells, Control systems, Control systems design, Modulation, Switches, Attenuators, Laser stabilization, Magnetism

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The importance of atom interferometers that have high sensitivity and super precision is well recognized in
the fields of rotation sensing, inertial and gravitational forces sensing, relativity tests, and other precision measures. So many researchers are absorbed in atom interferometers. An atom interferometer consists of many parts, among of which optical part plays a significant role because of the need of laser beams in every parts. Based on this situation and some specific quantitive requirements to laser beams, this article presents a laser frequency and power control system for atom interferometer which can realize the functions of frequency shift and scan, power stabilization and modulation, and highspeed switch. The system lies on acousto-optical modulators (AOM) and a phase-locked loop frequency synthesizer is designed in the system as a very important part which has wide capture range of frequency and well stability. The experimental results show that the designed system is available and the performances of laser through AOM are as good as expected and the phase noise of the output is restrained. In addition, the system also could be used in other instruments and devices, such as atomic clock, gravimeter, gradiometer, and gyroscope.

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