公开(公告)号：US5387974A

公开(公告)日：1995-02-07

申请号：US57831

申请日：1993-05-07

Applicant: Hajime Nakatani

Inventor： Hajime Nakatani

IPC: G01B9/02 ,  G01B11/02 ,  G01J3/26 ,  G01J9/00 ,  G01J9/02 ,  H01S3/00 ,  H01S3/137 ,  H01S3/139 ,  H01S3/225

CPC classification number: H01S3/137 ,  G01J9/0246 ,  H01S3/1394 ,  H01S3/225

Abstract: An inexpensive, high-accuracy and highly stable wavelength measuring device and laser device without requiring any complicated and expensive temperature regulating means, wherein an error in the measured wavelength of a to-be-measured light obtained from a photosensor by detecting temperature of a Fabry-Perot etalon with a temperature sensor and operating the error in wavelength from the detected data, caused by thermal expansion of a spacer.

Abstract translation: 廉价的，高精度的和高度稳定的波长测量装置和激光装置，而不需要任何复杂和昂贵的温度调节装置，其中通过检测法布里的温度从光电传感器获得的待测光的测量波长的误差 - 带有温度传感器的标准具，并根据检测到的数据来操作波长误差，这是由间隔物的热膨胀引起的。

公开(公告)号：US5384877A

公开(公告)日：1995-01-24

申请号：US80458

申请日：1993-06-21

Applicant: Julian Stone

Inventor： Julian Stone

IPC: G01J3/26 ,  G02B5/28 ,  G02B6/24 ,  G02B6/26 ,  G02B6/34 ,  H01S3/105 ,  G02B6/38

CPC classification number: G02B6/29395 ,  G01J3/26 ,  G02B6/29359 ,  G02B6/29398

Abstract: Both the fiber and the bulk Fabry-Perot etalons can be made temperature insensitive by the addition of a compensator element. This element adjusts the optical length of the air-gap in the etalon cavity so as to compensate for any changes in the optical length of the fiber or the etalon slab due to ambient temperature changes.

Abstract translation: 通过添加补偿元件，纤维和大块法布里 - 珀罗标准具都可以使其温度不敏感。 该元件调节标准具腔中气隙的光学长度，以补偿由于环境温度变化引起的光纤或标准具板的光学长度的任何变化。

公开(公告)号：US5361155A

公开(公告)日：1994-11-01

申请号：US35793

申请日：1993-03-23

Applicant: Dominique Chiaroni ,  Paulette Morin

Inventor： Dominique Chiaroni ,  Paulette Morin

IPC: G01J3/26 ,  G02B5/28 ,  G02B6/34 ,  G02B7/00 ,  G02B26/00 ,  H04J14/02

CPC classification number: G02B6/29395 ,  G02B26/007 ,  G02B6/29358

Abstract: A rotation tuned optical filter comprises a Fabry-Perot type interferometer disposed between an optical source and an optical receiver. The interferometer filters an input optical signal from the optical source. The input optical signal propagates substantially in a single mode. The interferometer supplies a filtered optical signal to the optical receiver which comprises a receiving surface which integrates the power density of the filtered optical signal. The filter comprises means for modifying the position of the filtered optical signal relative to the receiving surface of the optical receiver.

Abstract translation: 旋转调谐滤光器包括布置在光源和光接收器之间的法布里 - 珀罗型干涉仪。 干涉仪对来自光源的输入光信号进行滤波。 输入光信号基本上以单一模式传播。 干涉仪将滤波后的光信号提供给光接收机，该光接收机包括一个集成滤波光信号的功率密度的接收表面。 滤波器包括用于修改经滤波的光信号相对于光接收器的接收表面的位置的装置。

公开(公告)号：US5349439A

公开(公告)日：1994-09-20

申请号：US860997

申请日：1992-03-31

Applicant: Philippe Graindorge ,  Denis Trouchet

Inventor： Philippe Graindorge ,  Denis Trouchet

IPC: G01J3/26 ,  G01B9/02 ,  G01D5/26 ,  G01J3/45

CPC classification number: G01B9/02065 ,  G01B9/02032 ,  G01B9/02057 ,  G01B9/0209 ,  G01D5/266

Abstract: A measuring device comprises a light source with a wide spectrum feeding an optical sensor through an optical fiber. The sensor comprises an interferometer adjusted to a dull tint and an optical component sensitive to a measured parameter, which may be either a pressure, a measured displacement or an index of refraction of a fluid, a readout device includes the photodetector, a processing unit and an optical wedge for producing fringes, whose lateral positions, in contrast, are representative of the spectrum of the flux leaving the interferometer and analyzed by the photodetector. The processing unit measures the lateral position of the fringe and converts it into a value of the parameter P.

Abstract translation: 测量装置包括具有宽光谱的光源，通过光纤馈送光学传感器。 传感器包括调整为暗淡色调的干涉仪和对测量参数敏感的光学部件，测量参数可以是流体的压力，测量位移或折射率，读出装置包括光电检测器，处理单元和 相反，其横向位置代表离开干涉仪的光束的光谱并由光电检测器分析的用于产生条纹的光楔。 处理单元测量边缘的横向位置并将其转换为参数P的值。

公开(公告)号：US5315128A

公开(公告)日：1994-05-24

申请号：US54947

申请日：1993-04-30

Applicant: Neil E. J. Hunt ,  Erdmann F. Schubert ,  George J. Zydzik

Inventor： Neil E. J. Hunt ,  Erdmann F. Schubert ,  George J. Zydzik

IPC: G01J1/02 ,  G01J3/26 ,  H01L31/0232 ,  H01L31/0352 ,  H01L31/105 ,  H01L27/14

CPC classification number: H01L31/0232 ,  G01J3/26 ,  H01L31/0352 ,  H01L31/105

Abstract: Described is a resonant-cavity p-i-n photodetector based on the reflection or transmission through a Fabry-Perot cavity incorporating non-epitaxial, amorphous layers with alternating refractive index difference which layers are electron-beam deposited on a light-gathering side of a commercially available photodetector. The materials of the Fabry-Perot cavity are selectable from materials, refractive indices of which fall within a large range (from n=1.26 for CaF.sub.2 to n=3.5 for Si) preferably from materials which are depositable in an amorphous state. The material combinations are selected so that only wavelengths resonant with the cavity mode will be detected. The microcavity of the RC-PIN design can also be deposited on any existing detector structure, without modification of semiconductor growth. Such a photodetector would be useful for wavelength de-multiplexing applications. The ease of layer deposition, as well as the high degree of tailorability of spectral position, spectral detection width, and maximum numerical aperture of efficient detection, make the RC-PIN attractive for use in wavelength demultiplexing applications. An exemplary RC-PIN photodetector includes a Si/SiO.sub.2 Fabry-Perot cavity electron-beam deposited on the InP substrate of a commercial InGaAs photodetector. The detection efficiency relative to a reference device was 52 percent at the resonant wavelength of 1350 nm, with a resonance width of 14 nm, and a 4 percent response for off-resonance wavelengths in the 1100-1700 nm range.

Abstract translation: 描述了一种基于通过法布里 - 珀罗腔的反射或透射的谐振腔针式光电探测器，该腔体包含具有交替折射率差异的非外延非晶层，其中电子束沉积在市售光电探测器 。 法布里 - 珀罗腔的材料可从材料中选择，其折射率处于较大范围内（从CaF2的n = 1.26到Si的n = 3.5），优选可以以非晶态沉积的材料。 选择材料组合，使得仅检测到谐振腔模式的波长。 RC-PIN设计的微腔也可以沉积在任何现有的检测器结构上，而无需修改半导体生长。 这种光电检测器对于波长解复用应用将是有用的。 层次沉积的容易性以及光谱位置的高度定制性，光谱检测宽度和有效检测的最大数值孔径使RC-PIN具有吸引力用于波长解复用应用。 示例性RC-PIN光电检测器包括沉积在商业InGaAs光电检测器的InP衬底上的Si / SiO 2法布里 - 珀罗腔电子束。 在共振波长为1350nm，谐振宽度为14nm，对于1100-1700nm范围内的非共振波长响应为4％时，相对于参考装置的检测效率为52％。

公开(公告)号：US5056101A

公开(公告)日：1991-10-08

申请号：US585763

申请日：1990-09-19

Applicant: Peter D. Magill ,  Kenneth C. Reichmann

Inventor： Peter D. Magill ,  Kenneth C. Reichmann

IPC: G01J3/26 ,  G01J9/00 ,  H01S3/00 ,  H01S3/098 ,  H01S5/00

CPC classification number: H01S5/0014

Abstract: Accurate mode partition data from a laser are collected simply and rapidly in accordance with the principles of the invention wherein the laser output is directed to a filter which separates a central longitudinal mode from the side modes. The filter operates to present all side modes in a predetermined wavelength range simultaneously and continuously at the output of the filter. By subsequently comparing the intensity or power in the side modes delivered to the filter output with a predetermined threshold, it is possible to determine the frequency of occurrence and magnitude of mode partition events for side modes in the predetermined wavelength range. In one exemplary embodiment, the filter is realized by the combination of a Fabry-Perot etalon, whose longitudinal axis is angled with respect to the longitudinal axis (propagation axis) of the laser output beam directed onto the filter, together with an external reflector which is parallel to the Fabry-Perot etalon to permit multi-passing of the beam between the Fabry-Perot etalon and the reflector. The beam is reflected by the Fabry-Perot etalon so that after two or more passes within the filter only the side modes are output by the filter. In this arrangement, the filter acts as a notch filter having a wide passband and having an output for the side modes which is separate from an output for the main mode.

公开(公告)号：US5043571A

公开(公告)日：1991-08-27

申请号：US387213

申请日：1989-07-28

Applicant: Jun Hasegawa

Inventor： Jun Hasegawa

IPC: G01J1/16 ,  G01J3/12 ,  G01J3/26 ,  G01J3/28 ,  H01L27/148 ,  H04N5/355 ,  H04N5/372

CPC classification number: G01J3/26 ,  G01J3/2803 ,  G01J3/36 ,  H01L27/14831 ,  H04N3/1581 ,  H04N5/335 ,  G01J2001/1663 ,  G01J2003/1234 ,  G01J2003/2806

Abstract: A spectrophotometer is composed of a spectrofilter, a plurality of bandpass filters for cutting unnecessary transmission bands, and a CCD photosensor. The photosensor is composed of two sets of photosensors having different sensitivity ranges that overlap at some portion to increase the dynamic range of the device. The handling amount of charges is increased at every portion of the CCD photosensor in order to reduce the influence of the shot noise. Further, various technologies are used to enhance the accuracy and stability of the spectrophoto-measurement.

Abstract translation: 分光光度计由分光滤光器，用于切割不必要的透射带的多个带通滤光器和CCD光电传感器组成。 光传感器由具有不同灵敏度范围的两组光电传感器组成，在一些部分重叠以增加设备的动态范围。 为了减少喷射噪声的影响，CCD光电传感器的每个部分的电荷处理量增加。 此外，使用各种技术来提高分光光度测量的精度和稳定性。

公开(公告)号：US5027435A

公开(公告)日：1991-06-25

申请号：US303525

申请日：1989-01-27

Applicant: Andrew R. Chraplyvy ,  Patrick P. Iannone ,  Ivan P. Kaminow ,  Tingye Li ,  Julian Stone ,  Lawrence W. Stulz ,  Robert W. Tkach

Inventor： Andrew R. Chraplyvy ,  Patrick P. Iannone ,  Ivan P. Kaminow ,  Tingye Li ,  Julian Stone ,  Lawrence W. Stulz ,  Robert W. Tkach

IPC: G02B6/00 ,  G01J3/12 ,  G01J3/26 ,  G01J9/02 ,  G02B6/34 ,  H01S3/06 ,  H01S3/08 ,  H04B10/00 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/145 ,  H04B10/152 ,  H04B10/155 ,  H04B10/158

CPC classification number: H04B10/69 ,  G01J3/26 ,  G02B6/29359 ,  G02B6/29395 ,  G02B6/4246 ,  H04B10/50 ,  H04B10/506 ,  H04B10/572 ,  H04B10/67 ,  H04B10/675 ,  G01J2003/1247 ,  G01J2003/1252 ,  G01J2009/0226

Abstract: One aspect of the invention is a Fabry-Perot cavity which has in part a waveguiding portion and in part a nonwaveguiding portion. In this manner, a cavity is constructed whose length would be too short to manipulate effectively if it were comprises exclusively of a waveguiding portion, and whose length might have unacceptable diffraction losses if it were comprised exclusively of a nonwaveguiding portion. In the inventive device the resonant wavelength can be adjusted by varying the length of either the gap or the waveguide or both. The device can be advantageously constructed and aligned using fiber coupling technology.

Abstract translation: 本发明的一个方面是法布里 - 珀罗腔，其部分部分是波导部分，部分地是非波导部分。 以这种方式，构造其长度太短而不能有效地操作的空腔，如果它仅由波导部分组成，并且如果其仅由非波导部分组成，则其长度可能具有不可接受的衍射损耗。 在本发明的装置中，可以通过改变间隙或波导的长度或两者来调节谐振波长。 可以使用光纤耦合技术有利地构造和对准该装置。

公开(公告)号：US4999013A

公开(公告)日：1991-03-12

申请号：US338723

申请日：1989-04-14

Applicant: Michael Zoechbauer ,  Walter Fabinski

Inventor： Michael Zoechbauer ,  Walter Fabinski

IPC: G01J3/26 ,  G01N21/31

CPC classification number: G01N21/31 ,  G01J3/26 ,  G01N2201/067

Abstract: Interferometric equipment for detecting a substance having a structure preferably a periodic or quasiperiodic absorption spectrum; the equipment includes a source of radiation, a path for that radiation that includes a sample cell with the substance to be detected, an interference filter and a detector, and is improved in that the interference filter is constructed as an electrically tunable filter, including a plate or cell element with semitransparent reflective boundaries serving as electrodes; an electrical voltage is applied to said electrodes such that the transmission characteristics of the filter is varied and the amplitude of the voltage as applied to these electrodes is an indication of that variation; and the thickness of the plate or cell is selected to meet one of the following criteria (i) a distance between the interference lines produced equals a distance of absorption lines within a periodic absorption spectrum of said substance; (ii) the equipment causes a line to be separated from the radiation having a bandwidth which is small as compared with a spacing between two absorption lines of the substance to be found (iii) the equipment causes a line to be separated from the radiation, to overlap an edge of an absorption band of the substance to be directed.

Abstract translation: 用于检测具有优选周期性或准周期性吸收光谱的结构的物质的干涉仪; 该设备包括辐射源，该辐射路径包括具有待检测物质的样品池，干涉滤光器和检测器，并且改进了干涉滤光器被构造为电可调滤光器，包括 具有用作电极的半透明反射边界的板或单元元件; 电压被施加到所述电极，使得滤波器的传输特性改变，并且施加到这些电极的电压的幅度是该变化的指示; 选择板或单元的厚度以满足以下标准之一（i）产生的干涉线之间的距离等于所述物质的周期性吸收光谱内的吸收线的距离; （ii）设备使得线路与具有与要发现的物质的两条吸收线之间的间隔相比较小的带宽的辐射分离（iii）设备使线路与辐射分离， 以与待导向的物质的吸收带的边缘重叠。

公开(公告)号：US4907887A

公开(公告)日：1990-03-13

申请号：US269816

申请日：1988-11-10

Applicant: Donald A. Leonard ,  Harold E. Sweeney

Inventor： Donald A. Leonard ,  Harold E. Sweeney

IPC: G01J1/04 ,  G01J3/26

CPC classification number: G01J3/26 ,  G01J2001/0481

Abstract: The etendue (throughput or area-solid angle product) of a high resolution interferometer is maintained at a substantially high level by use of a transparent chamber defined by a highly reflective internal surface, the chamber being located at the input to the interferometer. The chamber has an input aperture to admit light into the chamber and an output aperture or exit opening to pass light to the interferometer. By integrating the input light through multiple reflections thereof within the chamber until it exits to the interferometer, the etendue of the latter is substantially enhanced.

Abstract translation: 通过使用由高反射性内表面限定的透明室，高分辨率干涉仪的光密度（通量或面积 - 立体角积）保持在基本上高的水平，该腔位于干涉仪的输入处。 腔室具有用于将光引入腔室的输入孔和用于将光传递到干涉仪的输出孔或出口。 通过将输入光通过室内的多次反射积分，直到其离开干涉仪，后者的光通量明显增强。