Optical spectroscopy apparatus and method for measurement of analyte concentrations or other such species in a specimen employing a semiconductor laser-pumped, small-cavity fiber laser

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	Optical spectroscopy apparatus and method for measurement of analyte concentrations or other such species in a specimen employing a semiconductor laser-pumped, small-cavity fiber laser
其他题名	Optical spectroscopy apparatus and method for measurement of analyte concentrations or other such species in a specimen employing a semiconductor laser-pumped, small-cavity fiber laser
	THORNTON, ROBERT L.
	2005-02-10
专利权人	THORNTON ROBERT L
公开日期	2005-02-10
授权国家	美国
专利类型	发明申请
摘要	An optical spectroscopy apparatus determines the concentration of analyte in a specimen that utilizes a single radiation source which is hybrid laser comprising a semiconductor pump laser and small-cavity rare earth fiber laser where laser cavities of both lasers are butt coupled or otherwise optically coupled to form a plurality of laser cavities that produce a plurality of emission wavelengths, one which may be the pump laser emission wavelength at the output of the fiber laser thereby forming a multi-wavelength combined output where the wavelengths substantially match distinguishing spectral characteristic features along at least a portion of a characteristic optical spectrum of the analyte under examination. In lieu of complex data analysis of these wavelengths to determine values representing the concentration of the analyte in an examined specimen, the semiconductor pump laser or lasers are modulated as a plurality of tone frequencies, where at least a first of the modulation frequencies is below the maximum frequency response of the fiber laser so that the first modulation effectively modulates the pump emission wavelength and a first emission wavelength of the fiber laser in the hybrid laser combined output, and at least a second of modulation frequencies is above the maximum frequency response of the fiber laser so that the second modulation effectively modulates the pump emission wavelength but not the first emission wavelength of the fiber laser in the hybrid laser combined output. Further, one or more additional modulation frequencies may be applied to the pump laser which are intermediate of the first and second modulation frequencies where it is at least responsive to at least one further emission wavelength of the fiber laser and also provided in the hybrid laser combined output.
其他摘要	光学光谱设备确定使用单个辐射源的样品中分析物的浓度，所述单个辐射源是包括半导体泵浦激光器和小腔稀土光纤激光器的混合激光器，其中两个激光器的激光腔被对接或以其他方式光学耦合以形成产生多个发射波长的多个激光腔，一个可以是光纤激光器输出端的泵浦激光发射波长，从而形成多波长组合输出，其中波长基本上匹配区别光谱特征特征沿至少一个被检查分析物的特征光谱的一部分。代替这些波长的复杂数据分析以确定表示被检查样本中分析物浓度的值，半导体泵浦激光器或激光器被调制为多个音调频率，其中至少第一个调制频率低于光纤激光器的最大频率响应，使得第一调制有效地调制混合激光器组合输出中的泵浦发射波长和光纤激光器的第一发射波长，并且至少第二调制频率高于最大频率光纤激光器的响应使得第二调制有效地调制泵浦发射波长而不是混合激光器组合输出中的光纤激光器的第一发射波长。此外，可以将一个或多个附加调制频率施加到泵浦激光器，其在第一和第二调制频率的中间，其中它至少响应于光纤激光器的至少一个另外的发射波长并且还在混合激光器中提供。输出。
主权项	An optical spectroscopy apparatus for determining the concentration of analyte in a specimen that utilizes a radiation source comprising at least one combination of a semiconductor pump laser and small-cavity fiber laser where laser cavities of both lasers are butt coupled to provide a plurality of laser cavities that produce a plurality of emission wavelengths at a same output of the butt coupled laser that are designed to substantially match distinguishing spectral characteristic features along at least a portion of an characteristic optical spectrum of the analyte under determination.
申请日期	2004-09-01
专利号	US20050030540A1
专利状态	失效
申请号	US10/932163
公开（公告）号	US20050030540A1
IPC 分类号	G01N21/00 \| H01S3/067 \| H01S3/0941 \| H01S3/16 \| H01S3/23 \| H01S5/183
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/57311
专题	半导体激光器专利数据库
作者单位	THORNTON ROBERT L
推荐引用方式 GB/T 7714	THORNTON, ROBERT L.. Optical spectroscopy apparatus and method for measurement of analyte concentrations or other such species in a specimen employing a semiconductor laser-pumped, small-cavity fiber laser. US20050030540A1[P]. 2005-02-10.