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	Atomic frequency acquisition device based on self-mixing interference
	MOENCH, HOLGER
	2012-09-11
著作权人	KONINKLIJKE PHILIPS ELECTRONICS N V
专利号	US8264284
国家	美国
文献子类	授权发明
其他题名	Atomic frequency acquisition device based on self-mixing interference
英文摘要	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.
公开日期	2012-09-11
申请日期	2009-05-27
状态	失效
内容类型	专利
源URL	[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. 2012-09-11.

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