Phase Variation Measurement in Mach–Zehnder Interferometric Switch-Reference-Cited by-同舟云学术

Phase Variation Measurement in Mach–Zehnder Interferometric Switch

Published:2021-10-26 Issue:6 Volume:21 Page:180-184
ISSN:1335-8871
Container-title:Measurement Science Review
language:en
Short-container-title:

Author:

Fan Sichen¹²³,Ruan Jun¹³,Liu Dandan¹³,Wang Xinliang¹³,Yang Fan¹²³,Guan Yong¹³,Zhang Hui¹²³,Shi Junru¹²³,Bai Yang¹²³,Zhang Shougang¹³

Affiliation:

1. National Time Service Center, Chinese Academy of Science , Xi’an, Shaanxi, 710600 , China

2. University of Chinese Academy of Science , Beijing 100039 , China

3. Key Laboratory of Time and Frequency Primary Standards , Chinese Academy of Science , Xi’an, Shaanxi, 710600 , China

Abstract

Abstract Phase variations of the interrogation field lead to frequency shifts in Ramsey-type atomic clocks. This paper reports the development of a 300 MHz Mach–Zehnder (MZ) switch that effectively suppresses phase-transient effects. Similar to MZ interferometers, this radio-frequency (RF) MZ switch comprises two arms that are power- and phase-matched with each other. By inserting a PIN diode RF switch in one arm, the other arm remains undisturbed, freeing it of the phase transient. Trigger phase fluctuation measurements are implemented by using a lock-in amplifier to extract the in-phase and quadrature (I/Q) demodulation data. The results show that the extinction ratio of the RF MZ switch phase fluctuations is <5 μrad, which is significantly lower than that of a PIN (50 μrad). When applied to a cesium fountain clock, the RF MZ switch produces a frequency shift better than 1.73 × 10−16.

Publisher

Walter de Gruyter GmbH

Subject

Instrumentation,Biomedical Engineering,Control and Systems Engineering

Link

https://www.sciendo.com/pdf/10.2478/msr-2021-0024

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