23 May 2018 Principle demonstration of the phase locking based on the electro-optic modulator for Taiji space gravitational wave detection pathfinder mission
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Abstract
Weak-light phase locking is a key technology for Taiji space gravitational wave detection and its pathfinder mission. Previously, the phase locking was achieved by a complicated technique, which controls the frequency of the laser via a piezo-electric actuator (kHz range or more) and a temperature actuator (sub-Hz range). We propose an easy phase-locking strategy, which is based on the electro-optic modulator (EOM). Compared with the traditional way, this strategy only needs to modulate the driven voltage of the EOM, and the frequency bandwidth can cover all ranges. An experiment is also established to prove the feasibility of the method. The results show that the noises are <80  μrad  /  Hz1/2 in frequencies from 0.2 to 1 Hz, and the thermal drift is the main noise source in our recent system.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Heshan Liu, Heshan Liu, Yuhui Dong, Yuhui Dong, Ruihong Gao, Ruihong Gao, Ziren Luo, Ziren Luo, Gang Jin, Gang Jin, } "Principle demonstration of the phase locking based on the electro-optic modulator for Taiji space gravitational wave detection pathfinder mission," Optical Engineering 57(5), 054113 (23 May 2018). https://doi.org/10.1117/1.OE.57.5.054113 . Submission: Received: 28 March 2018; Accepted: 10 May 2018
Received: 28 March 2018; Accepted: 10 May 2018; Published: 23 May 2018
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