Digital control of diode laser for atmospheric spectroscopy

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	Digital control of diode laser for atmospheric spectroscopy
其他题名	Digital control of diode laser for atmospheric spectroscopy
	MENZIES; ROBERT T.; RUTLEDGE; CHARLES W.
	1985-04-02
专利权人	THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
公开日期	1985-04-02
授权国家	美国
专利类型	授权发明
摘要	A system for remote absorption spectroscopy of trace species using a diode laser (14) tunable over a useful spectral region of 50 to 200 cm.sup.-1 by control of diode laser temperature over range from 15.degree. K. to 100.degree. K., and tunable over a smaller region of typically 0.1 to 10 cm.sup.-1 by control of the diode laser current over a range from 0 to 2 amps. Diode laser temperature and current set points are transmitted to the instrument in digital form and stored in memory (32) for retrieval under control of a microprocessor (28) during measurements. The laser diode current is determined by a digital-to-analog converter (62) through a field-effect transistor (Q.sub.1) for a high degree of ambient temperature stability, while the laser diode temperature is determined by set points entered into a digital-to-analog converter (64) under control of the microprocessor. Temperature of the laser diode is sensed by a sensor diode (18) to provide negative feedback to the temperature control circuit that responds to the temperature control digital-to-analog converter (64).
其他摘要	利用半导体激光器（14）在50至200cm-1的有用光谱区域上可调谐的半导体激光器温度范围从15.degree控制的痕量物质远程吸收光谱系统。K.到100.degree。K.通过控制二极管激光电流在0至2安培的范围内可以在通常0.1至10cm-1的较小区域内进行调谐。二极管激光器温度和电流设定点以数字形式传输到仪器，并且在测量期间在微处理器（28）的控制下存储在存储器（32）中以供检索。激光二极管电流由数字 - 模拟转换器（62）通过场效应晶体管（Q1）确定，以获得高度的环境温度稳定性，而激光二极管温度由输入的设定点确定转换成微处理器控制下的数字 - 模拟转换器（64）。激光二极管的温度由传感器二极管（18）检测，以向温度控制电路提供负反馈，该温度控制电路响应温度控制数字 - 模拟转换器（64）。
申请日期	1982-06-03
专利号	US4509130
专利状态	失效
申请号	US06/384547
公开（公告）号	US4509130
IPC 分类号	G01N21/31 \| G01N21/39 \| H01S5/00 \| H01S5/062 \| H01S5/024 \| H01S5/06 \| G01N21/25 \| G01N21/29
专利代理人	-
代理机构	MCCAUL, PAUL F. MANNING, JOHN R. JONES, THOMAS H.
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/34731
专题	半导体激光器专利数据库
作者单位	THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION
推荐引用方式 GB/T 7714	MENZIES,ROBERT T.,RUTLEDGE,et al. Digital control of diode laser for atmospheric spectroscopy. US4509130[P]. 1985-04-02.

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