单光子波长调制吸收光谱用于1.5μm激光器的波长锁定  

Single photon wavelength modulation absorption spectrum of acetylene for 1.5μm laser wavelength stabilization

作　　者：王晓波[1] 马维光[1] 王晶晶[1] 肖连团[1] 贾锁堂[1] 

机构地区：[1]山西大学激光光谱实验室,量子光学与光量子器件国家重点实验室,太原030006

出　　处：《物理学报》2012年第10期189-193,共5页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2012CB921603;2010CB923103);国家自然科学基金(批准号:11174187;61178009;60908019;10934004);国家基金创新团队(批准号:60821004);山西省科技基础条件平台建设项目(批准号:2011091016);山西省高等学校中青年拔尖创新人才支持计划与山西省高等学校优秀创新团队支持计划资助的课题~~

摘　　要：提出了一种kHz调制频率量级的单光子调制技术,实现对激光器的实时锁定.通过探测乙炔气体的单光子吸收光谱,对离散的单光子响应脉冲进行锁定放大,获得激光器频率锁定的鉴频曲线.将1.5μm分布反馈半导体激光器的输出频率稳定在乙炔气体v_1+v_3带P5e支吸收峰上,在175 s内典型激光频率起伏小于25 MHz.这种基于单光子波长高频调制吸收光谱的稳频技术消除了低频段较高背景的噪声,可应用于单光子量级的量子保密通讯系统以及光学波分复用系统.We describe a kHz single photon wavelength modulation technology to realize the locking reference signal of the laser frequency. By detecting the single photon acetylene gas absorption spectrum and by amplifying the lock-in the discrete single photon response pulse, we achieve the laser frequency stabilized in real time. The 1.5μm distribution feedback semiconductor laser output frequency is stabilized at acetylene gas absorption peaks, and the typical laser frequency fluctuation is less than 25 MHz within 175 s. This single photon wavelength modulated absorption spectrum technology eliminates the high background noise in low frequency range and can be used in the quantum communication system and optical wavelength division multiplex.

关 键 词：单光子调制 吸收光谱 锁定 . 

分 类 号：TN24[电子电信—物理电子学] O431.2[机械工程—光学工程]