摘要
原子干涉仪通常采取拉曼脉冲序列对原子波包进行相干操作,高功率的拉曼光可让更多的原子参与速度敏感型受激拉曼跃迁,有利于实现信噪比高的原子干涉仪条纹。研制高功率的拉曼激光器对冷原子干涉仪的实验研究具有重要意义,报道了基于注入锁定技术实现的高功率拉曼激光器的实验结果。主激光器经过1.5GHz声光调制器产生±1级衍射光作为拉曼光的种子光,注入到两个从激光器后锁定,并实现功率放大。两个拉曼光的频率相差3.0 GHz,频率调谐范围为200 MHz。
Raman pulse sequences are generally used to coherently manipulate the atomic wave packet in an atom interferometer. High power Raman beams allow more atoms join in the velocity-sensitive stimulated Raman transition, and that will be helpful for obtaining high signal to noise ratio in atom interferometer fringe. Development of high power Raman laser is important for cold atom interferometer experiments. The experimental realization of high power Raman lasers are demonstrated based on injection locking technique. Master laser is modulated by a 1.5 GHz acousto-optical modulator, and the ±1 order diffraction lights are used as seeding Raman lasers. The seeding lasers are injection locked to two slave lasers which are further amplified as Raman beams. The frequency difference of Raman beams is 3.0 GHz, and the detuning range is about 200 MHz.
出处
《量子电子学报》
CAS
CSCD
北大核心
2012年第1期27-31,共5页
Chinese Journal of Quantum Electronics
基金
国家自然科学基金(11074281
11004227)
国家基础研究发展规划(2010CB832805)资助项目
关键词
激光技术
拉曼激光
注入锁定
原子干涉
laser technology
Raman laser
injection locking
atom interferometer
