Atomic frequency acquisition device based on self-mixing interference

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	Atomic frequency acquisition device based on self-mixing interference
其他题名	Atomic frequency acquisition device based on self-mixing interference
	MOENCH, HOLGER
	2012-09-11
专利权人	KONINKLIJKE PHILIPS ELECTRONICS N V
公开日期	2012-09-11
授权国家	美国
专利类型	授权发明
摘要	The present invention relates to an atomic frequency acquisition device comprising a gas cell (400) filled with an atomic gas, a laser light source (100) emitting a laser beam which enters the gas cell (40) and excites a first energy transition of the atomic gas, a local oscillator (700) for generating an oscillator frequency in a frequency range including a frequency of a HFS transition of the atomic gas, and a modulator (600) modulating the laser light source (100) so as to emit laser radiation modulated with the oscillator frequency. An optical reflector (500) is arranged behind the gas cell (400) to reflect the laser beam after passage through the atomic gas so as to re-enter the laser cavity. A photodetector (200) detects beat frequencies caused by self-mixing interference within the laser cavity. A control unit (750, 800) controls the local oscillator (700) so as to periodically vary the oscillation frequency between two frequency margins which are adapted in such a way that a maximum beat frequency in the output signal of the photodetector (200) is within the two frequencies margins. The proposed device allows miniaturization and cost reduction by using a VCSEL with an integrated photodiode and achieves operation with fewer detection problems.
其他摘要	原子频率获取装置技术领域本发明涉及一种原子频率获取装置，包括填充有原子气体的气室（400），发射激光束的激光光源（100），所述激光束进入气室（40）并激发第一能量跃迁。原子气体，用于产生包括原子气体的HFS跃迁频率的频率范围内的振荡器频率的本地振荡器（700），以及调制激光光源（100）以发射激光辐射的调制器（600）用振荡器频率调制。光学反射器（500）布置在气室（400）后面，以在通过原子气体之后反射激光束，以便重新进入激光腔。光检测器（200）检测由激光腔内的自混合干涉引起的拍频。控制单元（750,800）控制本地振荡器（700），以便周期性地改变两个频率余量之间的振荡频率，这两个频率余量适合于光电探测器（200）的输出信号中的最大拍频。在两个频率范围内。所提出的装置通过使用具有集成光电二极管的VCSEL实现小型化和成本降低，并且实现具有较少检测问题的操作。
主权项	An atomic frequency acquisition device comprising: a gas cell filled with an atomic gas having first and second energy transitions allowing coherent population trapping, said first and second energy transitions corresponding to first and second transition frequencies; a laser light source with a laser cavity emitting a laser beam which enters the gas cell and excites the first energy transition of the atomic gas; a local oscillator adapted to generate an oscillator frequency in a frequency range including half of the second transition frequency of the atomic gas; a modulator modulating said laser light source so as to emit laser radiation modulated with the oscillator frequency; an optical reflector arranged to reflect the laser beam after passage through the atomic gas so as to re-enter the laser cavity, said re-entered laser beam causing a self-mixing effect in the laser cavity, resulting in beat frequencies in an intensity of the emitted laser radiation; a photodetector arranged to provide an output signal comprising said beat frequencies; and a control unit connected to the photodetector and the local oscillator and controlling the local oscillator so as to periodically vary the oscillation frequency between two frequency margins based on the beat frequencies, the two frequency margins being adapted in such a way that a maximum beat frequency in the output signal of the photodetector is within the two frequency margins.
申请日期	2009-05-27
专利号	US8264284
专利状态	失效
申请号	US12/993877
公开（公告）号	US8264284
IPC 分类号	H03L7/26 \| H03B21/01 \| H01S1/06 \| H01S3/13 \| H01S3/22 \| H03B17/00
专利代理人	-
代理机构	BELOBORODOV, MARK L.
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/46787
专题	半导体激光器专利数据库
作者单位	KONINKLIJKE PHILIPS ELECTRONICS N V
推荐引用方式 GB/T 7714	MOENCH, HOLGER. Atomic frequency acquisition device based on self-mixing interference. US8264284[P]. 2012-09-11.

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