公开(公告)号：US06373563B1

公开(公告)日：2002-04-16

申请号：US09438441

申请日：1999-11-12

Applicant: James R. Stimple ,  Kenneth R. Wildnauer

Inventor： James R. Stimple ,  Kenneth R. Wildnauer

IPC: G01N2121

CPC classification number: H04B10/506

Abstract: An optical source generates optical signals as a result of varying polarization states to achieve oscillation within an optical loop. The optical signals have narrow spectral width and the optical source is tuneable, so that optical components stimulated by the optical signals can be characterized over a predefined wavelength range with high wavelength resolution. The optical loop includes an optical gain element, a tuneable filter, and a polarization scrambler that provides a varying polarization transfer function. The optical gain element has sufficiently high gain within the passband of the tuneable filter and the polarization transfer function is sufficiently varied to attain oscillation within the optical loop, thereby generating the optical signals. The varying polarization transfer function of the polarization scrambler produces a corresponding variation in the polarization of the generated optical signals, which are coupled from the optical loop to an output.

Abstract translation: 光源由于改变偏振状态而产生光信号，以实现光环路内的振荡。 光信号具有窄的光谱宽度并且光源是可调谐的，使得由光信号激发的光学部件可以在具有高波长分辨率的预定波长范围内表征。 光环路包括光增益元件，可调谐滤波器和提供变化的极化传递函数的偏振加扰器。 光增益元件在可调谐滤波器的通带内具有足够高的增益，并且极化传递函数充分变化以在光环路内获得振荡，从而产生光信号。 偏振加扰器的变化极化传递函数产生所生成的光信号的偏振的相应变化，其从光环路耦合到输出端。

公开(公告)号：US4156848A

公开(公告)日：1979-05-29

申请号：US792962

申请日：1977-05-02

Applicant: James R. Stimple ,  Timothy P. Craig

Inventor： James R. Stimple ,  Timothy P. Craig

IPC: H03G3/20 ,  H04B1/16 ,  H04B17/00

CPC classification number: H03G3/20

Abstract: The pre-limited IF signal from an FM receiver is coupled to a pair of linear amplifiers in a cascade configuration. The outputs from the amplifiers are detected and passed to piecewise linear amplifiers. Each piecewise linear amplifier is designed to exhibit a gain characteristic which is dependent on the level of signals applied at its input. A summing circuit sums the piecewise linear amplified signals in predetermined proportion to thereby produce a DC signal which is linearly related to the receiver's quieting level.

Abstract translation: FM接收机的预限制IF信号以级联配置耦合到一对线性放大器。 来自放大器的输出被检测并传递到分段线性放大器。 每个分段线性放大器被设计为表现出取决于在其输入端施加的信号电平的增益特性。 加法电路以分段线性放大信号按预定比例相加，从而产生与接收机静音电平线性相关的DC信号。