公开(公告)号：US5363390A

公开(公告)日：1994-11-08

申请号：US156216

申请日：1993-11-22

Applicant: Long Yang ,  Rajeev Ram

Inventor： Long Yang ,  Rajeev Ram

IPC: G02F1/37 ,  H01S3/094 ,  H01S3/109 ,  H01S5/00 ,  H01S5/02 ,  H01S5/06 ,  H01S5/183 ,  H01S3/10

CPC classification number: H01S5/183 ,  H01S3/109 ,  H01S5/0215 ,  H01S5/0604 ,  H01S5/3202

Abstract: A surface-emitting laser with an integral nonlinear crystal. The laser generates light at a fundamental frequency. The nonlinear crystal converts the light into light at twice the fundamental frequency. The laser is configured in a vertical-cavity, surface-emitting structure. An adhesive layer containing indium such as indium gallium phosphide is disposed between a phosphide nonlinear crystal and an arsenide optical amplifier. The optical amplifier and the nonlinear crystal are fused together. The optical amplifier and the nonlinear crystal are located inside a laser cavity that is defined between a pair of reflectors. One of the reflectors is located adjacent the nonlinear crystal and is highly reflective of light at the fundamental frequency but transmissive of light at twice the fundamental frequency. Light is generated at the fundamental frequency, doubled in frequency as it passes back and forth through the nonlinear crystal, and emitted through the reflector adjacent the nonlinear crystal. An intracavity reflector may be included between the optical amplifier and the nonlinear crystal to prevent light at twice the fundamental frequency from propagating from the nonlinear crystal into the optical amplifier.

Abstract translation: 具有积分非线性晶体的表面发射激光器。 激光以基频发光。 非线性晶体将光转换成基本频率的两倍。 激光器配置在垂直腔，表面发射结构中。 在磷化物非线性晶体和砷化物光放大器之间设置含铟铟镓磷的粘合剂层。 光放大器和非线性晶体融合在一起。 光放大器和非线性晶体位于激光腔内，该激光腔被定义在一对反射器之间。 反射器中的一个位于非线性晶体附近，并且在基频处的光高度反射，但是以基频的两倍的光透射。 光在基频产生，频率在来回穿过非线性晶体时频率翻了一倍，并通过邻近非线性晶体的反射器发射。 可以在光放大器和非线性晶体之间包括腔内反射器，以防止基频两倍的光从非线性晶体传播到光放大器中。

公开(公告)号：US20060274151A1

公开(公告)日：2006-12-07

申请号：US11376722

申请日：2006-03-15

Applicant: Dietrich Lueerssen ,  Rajeev Ram ,  Janice Hudgings ,  Peter Mayer

Inventor： Dietrich Lueerssen ,  Rajeev Ram ,  Janice Hudgings ,  Peter Mayer

IPC: H04N17/00 ,  H04N17/02

CPC classification number: G01J5/0003 ,  G01K11/125 ,  G01N21/1717 ,  G01N21/55 ,  G01N25/18 ,  G01N2021/1731

Abstract: The invention is directed to systems and methods of digital signal processing and in particular to systems and methods for measurements of thermoreflectance signals, even when they are smaller than the code width of a digital detector used for detection. For example, in some embodiments, the number of measurements done is selected to be sufficiently large so as to obtain an uncertainty less than the code width of the detector. This allows for obtaining images having an enhanced temperature resolution. The invention is also directed to methods for predicting the uncertainty in measurement of the signal based on one or more noise variables associated with the detection process and the number of measurement iterations.

Abstract translation: 本发明涉及数字信号处理的系统和方法，特别涉及用于测量热反射信号的系统和方法，即使它们小于用于检测的数字检测器的代码宽度。 例如，在一些实施例中，完成的测量数量被选择为足够大，以便获得小于检测器的代码宽度的不确定性。 这允许获得具有增强的温度分辨率的图像。 本发明还涉及用于基于与检测过程相关联的一个或多个噪声变量和测量迭代次数来预测信号测量的不确定性的方法。