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公开(公告)号：US6084682A
公开(公告)日：2000-07-04
申请号：US61080
申请日：1998-04-15
CPC分类号： G01N21/39 , G01N2021/391
摘要： Distinct locking and sampling light beams are used in a cavity ring-down spectroscopy (CRDS) system to perform multiple ring-down measurements while the laser and ring-down cavity are continuously locked. The sampling and locking light beams have different frequencies, to ensure that the sampling and locking light are decoupled within the cavity. Preferably, the ring-down cavity is ring-shaped, the sampling light is s-polarized, and the locking light is p-polarized. Transmitted sampling light is used for ring-down measurements, while reflected locking light is used for locking in a Pound-Drever scheme.
摘要翻译： 不同的锁定和采样光束在空腔衰减光谱（CRDS）系统中被使用，以在激光和衰减腔被连续锁定的同时进行多次衰减测量。 采样和锁定光束具有不同的频率，以确保采样和锁定光在腔内解耦。 优选地，环形腔是环形的，采样光是s偏振的，并且锁定光是p偏振的。 发射采样灯用于衰减测量，而反射锁定灯用于锁定Pound-Drever方案。
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公开(公告)号：US06532071B2
公开(公告)日：2003-03-11
申请号：US09755253
申请日：2001-01-04
IPC分类号： G01N2117
CPC分类号： G01N21/39
摘要： An analog detection system for determining a ring-down rate or decay rate 1/&tgr; of an exponentially decaying ring-down beam issuing from a lifetime or ring-down cavity during a ring-down phase. Alternatively, the analog detection system determines a build-up rate of an exponentially growing beam issuing from the cavity during a ring-up phase. The analog system can be employed in continuous wave cavity ring-down spectroscopy (CW CRDS) and pulsed CRDS (P CRDS) arrangements utilizing any type of ring-down cavity including ring-cavities and linear cavities.
摘要翻译： 一种模拟检测系统，用于确定在衰落阶段期间从寿命或衰落腔中发出的指数衰减衰减波束的衰减速率或衰减速率1 /τ。 或者，模拟检测系统确定在振铃阶段期间从空腔发出的指数增长的光束的累积速率。 模拟系统可用于连续波腔衰减光谱（CW CRDS）和脉冲CRDS（P CRDS）布置，利用任何类型的环形腔包括环形腔和线性腔。
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公开(公告)号：US06233052B1
公开(公告)日：2001-05-15
申请号：US09273195
申请日：1999-03-19
IPC分类号： G01N2100
CPC分类号： G01N21/39
摘要： An analog detection system for determining a ring-down rate or decay rate 1/&tgr; of an exponentially decaying ring-down beam issuing from a lifetime or ring-down cavity during a ring-down phase. Alternatively, the analog detection system determines a build-up rate of an exponentially growing beam issuing from the cavity during a ring-up phase. The analog system can be employed in continuous wave cavity ring-down spectroscopy (CW CRDS) and pulsed CRDS (P CRDS) arrangements utilizing any type of ring-down cavity including ring-cavities and linear cavities.
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4.发明授权Optical beamsplitter for a polarization insensitive wavelength detector and a polarization sensor 失效用于偏振不敏感波长检测器和偏振传感器的光分路器公开(公告)号：US06836330B2
公开(公告)日：2004-12-28
申请号：US10112985
申请日：2002-03-28
IPC分类号： G01N2125
CPC分类号： G01J9/00
摘要： A wavelength detector is described. The wavelength detector includes a beamsplitter having a wedged back surface with respect to the front surface to reflect the incoming optical signal into two paths. Filters, at least one of which varies with wavelength of the optical signal are in each of the said paths. The filtered light in the two paths is detected by a photodetector and the output electrical signals are log amplified. The log amplified signals are applied to a difference amplifier whose output is indicative of the wavelength or polarization of the incident optical signal.
摘要翻译： 描述波长检测器。 波长检测器包括相对于前表面具有楔形后表面以将入射光信号反射成两条路径的分束器。 其中至少一个随着光信号的波长而变化的滤波器在每个所述路径中。 两路径中的滤波光被光检测器检测，输出电信号被对数放大。 对数放大信号被施加到输出表示入射光信号的波长或极化的差分放大器。
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5.发明授权Laser-based spectrometer for use with pulsed and unstable wavelength laser sources 失效用于脉冲和不稳定波长激光源的基于激光的光谱仪公开(公告)号：US06775001B2
公开(公告)日：2004-08-10
申请号：US10377976
申请日：2003-02-28
IPC分类号： G01N2100
CPC分类号： G01N21/3504 , G01J3/42 , G01J9/00 , G01N21/274
摘要： A laser absorption spectrometer for making measurements of absorption spectra which includes a wavelength sensor that can measure the average wavelength of pulses from a laser on a pulse-by-pulse basis and that can measure the internal wavelength variation of laser pulses. The laser absorption spectrometer can be used with pulsed lasers like the quantum cascade laser to perform sensitive measurements of the absorption spectra even when there is pulse-to-pulse variation of average wavelength and when there are internal changes in the wavelength of the pulses.
摘要翻译： 用于测量吸收光谱的激光吸收光谱仪，其包括可以逐脉冲测量来自激光器的脉冲的平均波长并且可以测量激光脉冲的内部波长变化的波长传感器。 激光吸收光谱仪可以与脉冲激光器一起使用，例如量子级联激光器，即使当脉冲对脉冲的平均波长变化和脉冲波长内部发生变化时也可以对吸收光谱进行敏感测量。
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6.发明授权公开(公告)号：US06738140B2
公开(公告)日：2004-05-18
申请号：US09954086
申请日：2001-09-17
IPC分类号： G01N2125
CPC分类号： G01J9/00
摘要： A wavelength detector is described. The wavelength detector directs an incoming optical signal into two paths, at least one of which varies with wavelength of the optical signal. The light in the two paths is detected by a photodetector and the output electrical signals are log amplified. The log amplified signals are applied to a difference amplifier whose output is indicative of the wavelength of the incident optical signal.
摘要翻译： 描述波长检测器。 波长检测器将入射光信号引导成两个路径，其中至少一个随着光信号的波长而变化。 两路径中的光被光检测器检测，输出电信号被对数放大。 对数放大信号被施加到输出表示入射光信号的波长的差分放大器。
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