摘要
本文基于新型单波长外腔共振和频技术实现了转换效率高、波长可调谐589nm激光的输出,其中基频光波长分别为1583nm和938nm,和频晶体为周期极化铌酸锂.在1583nm激光频率被锁定到外部环形腔腔模后,通过对938nm激光的频率扫描实现了输出功率4.96mW,调谐范围7GHz的589nm激光输出,并采用声光调制器的伺服反馈技术有效提高了输出功率的稳定性.最后采用该光源对钠原子在348—413K(75—140C)时D2线的饱和荧光谱进行了测量.观察到了多普勒背景下钠D2a,D2b以及Crossover的亚多普勒结构,其均可为589nm频率的锁定提供参考信号.
A wavelength-tunable laser output at 589 nm with high conversion efficiency based on sum-frequency generation by using the technique of single-wavelength extra-cavity resonance is achieved. The two fundamental wavelengths are 1583 nm and 938 nm and the nonlinear crystal is the period-poled lithium niobate. After the frequency of 1583 nm laser was locked to the cavity mode and the frequency of 938 nm laser was scanned, a 589 nm laser output with power of 4.96 mW and wavelength tuning range of 7 GHz was obtained and the stability of the output power is improved effectively with the help of servo feedback loop technique of acousto-optic- modulator. Finally, based on this laser, the saturated fluorescence spectrum of sodium D 2 line in the temperature range of 348—413 K （75—140 C） were measured. The Doppler-free structures of D 2 a, D 2 b and crossover lines on Doppler background were observed, which can provide reference signals for the frequency locking of 589nm laser.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第9期211-216,共6页
Acta Physica Sinica
基金
国家重点基础研究发展计划(973计划)(批准号:2012CB921603)
国家自然科学基金(批准号:61127017,61178009,61108030,60908019,61275213,61205216)
山西省青年科学基金(批准号:2010021003-3,2012021022-1)资助的课题~~
关键词
单波长外腔共振
和频
589nm
钠原子饱和荧光谱
single-wavelength extra-cavity resonance
sum-frequency
589 nm
sodium atom saturated fluorescence spectrum
