公开(公告)号：US20040100635A1

公开(公告)日：2004-05-27

申请号：US10338996

申请日：2003-01-09

Applicant: Intel Corporation

Inventor： Mark McDonald

IPC: G01J003/45 ,  G01B009/02

CPC classification number: G01J1/4257 ,  G01J3/0205 ,  G01J3/0256 ,  G01J3/0259 ,  G01J9/00

Abstract: A quasi-monochromatic light beam carrier for a particular telecommunication channel is likely to experience drift because of age, temperature, or other factors, and may cause the centroid wavelength of the carrier to shift. Temperature adjustments by wavelength lockers to compensate for drift on one channel may affect the performance of other channels. Embodiments of the present invention couple a quasi-monochromatic light beam through a substrate-based grating, diffract the light beam from the edge of the substrate to free space, and detect the light beam from free space at a position detector to determine the centroid wavelength based on a position of the light beam incident on the detector. The diffracted light beam may be reflected within the substrate a number of times prior to exiting the substrate towards the detector.

Abstract translation: 用于特定电信信道的准单色光束载波可能由于年龄，温度或其他因素而经历漂移，并且可能导致载波的质心波长偏移。 通过波长锁定器对一个通道上的漂移进行温度调节可能会影响其他通道的性能。 本发明的实施例将准单色光束通过基于基板的光栅耦合，将光束从基板的边缘衍射到自由空间，并且从位置检测器处的​​自由空间检测光束以确定质心波长 基于入射到检测器上的光束的位置。 在离开衬底朝向检测器之前，衍射光束可以在衬底内反射多次。