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	Apparatus and method for optical heterodyne conversion
	BROWN, ELLIOTT R.; SMITH, FRANK W.
	1997-09-02
著作权人	MASSACHUSETTS INSTITUTE OF TECHNOLOGY
专利号	US5663639
国家	美国
文献子类	授权发明
其他题名	Apparatus and method for optical heterodyne conversion
英文摘要	An apparatus and method for optical heterodyne conversion and a radiation source and integrated diagnostics using the apparatus and method are disclosed. The radiation source can operate in a high-power narrow-band mode in which a constant-frequency output is provided or in a low-power broadband mode in which the frequency is tunable to allow the radiation source to act as a sweep oscillator. The apparatus or photomixer includes two sets of interdigitated conductive electrodes formed on top of a crystal lattice formed of column III-V compounds, particularly InAlGaAs compounds. Additional column V atoms are interspersed within the lattice structure to form defect energy states in the bandgap of the host material. The region of the material between the interdigitated electrodes is illuminated by optical radiation containing two different frequencies. Photon absorption in the material causes a current at the difference frequency to be generated and coupled to the interdigitated electrodes. The current is then coupled to a planar transmission line or antenna structure to generate coherent, continuous-wave, unimodal radiation in the microwave, millimeter-wave, or submillimeter-wave regions.
公开日期	1997-09-02
申请日期	1994-01-18
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/35036]
专题	半导体激光器专利数据库
作者单位	MASSACHUSETTS INSTITUTE OF TECHNOLOGY
推荐引用方式 GB/T 7714	BROWN, ELLIOTT R.,SMITH, FRANK W.. Apparatus and method for optical heterodyne conversion. US5663639. 1997-09-02.

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