Influence of the bandwidth of feedback loop in frequency stabilization of external-cavity diode laser by polarization spectroscopy

被引：0

作者：

Wang, Jing ^{[1
]}

Yang, Baodong ^{[1
]}

He, Jun ^{[1
]}

Zhao, Jiangyan ^{[1
]}

Zhang, Tiancai ^{[1
]}

Wang, Junmin ^{[1
]}

机构：

[1] State Key Laboratory of Quantum optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University

来源：

Guangxue Xuebao/Acta Optica Sinica | 2009年 / 29卷 / 02期

关键词：

Bandwidth of feedback loop; External-cavity diode laser (ECDL); Laser frequency stabilization; Polarization spectroscopy; Single-atom magneto-optical trap;

D O I：

10.3788/AOS20092902.0425

中图分类号：

学科分类号：

摘要：

Based on the experiment of trapping single cesium atoms in magneto-optical trap (MOT), a grating-external-cavity diode laser, which provides the cooling/trapping beams of MOT is locked to cesium 6S1/2F=4→6P3/2F′=5 cycling transition by modulation-free polarization spectroscopy. This frequency locking method uses the dispersion-like curve generated from polarization spectroscopy as frequency-discriminating signal. The error signal is feedback to both current modulation port of diode laser and voltage modulation port of piezoelectric transducer (PZT) in grating external cavity. The locking technique of modulation-free polarization spectroscopy can clearly improve the frequency stability compared with conventional saturation absorption spectroscopic technique. The minimum value of Allan variance is σy(τ) = 4.6 × 10-12 at average time of τ=300 s.

引用

页码：425 / 430

页数：5

共 14 条

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