公开(公告)号：US20040075832A1

公开(公告)日：2004-04-22

申请号：US10720146

申请日：2003-11-25

Applicant: Fujitsu Limited

Inventor： Takeo Iwama

IPC: G01J003/28

CPC classification number: G01J9/0246 ,  G01J3/1256 ,  G01J3/2803

Abstract: In an optical spectrum analyzer comprising a spectrograph and a photodevice array, and an optical spectrum detecting method, a wavelength deviation, from an assigned wavelength, of a light detected by a photodevice array which detects a wavelength of a diffraction light or a non-diffraction light from an acoustooptic device, is detected and a feedback control to a diffraction angle of the acoustooptic device is performed. Also, without using a feedback control, an exit light and a diffraction light from the acoustooptic device are respectively received by two photodevice arrays and the photodevices are arranged in order to mutually compensate gaps between the photodevices, whereby a center of each photodevice is similarly made coincide with a peak of an optical beam to be received.

公开(公告)号：US20020131042A1

公开(公告)日：2002-09-19

申请号：US09938483

申请日：2001-08-27

Applicant: FUJITSU LIMITED

Inventor： Takeo Iwama

IPC: G01J003/28

CPC classification number: G01J9/0246 ,  G01J3/1256 ,  G01J3/2803

Abstract: In an optical spectrum analyzer comprising a spectrograph and a photodevice array, and an optical spectrum detecting method, a wavelength deviation, from an assigned wavelength, of a light detected by a photodevice array which detects a wavelength of a diffraction light or a non-diffraction light from an acoustooptic device, is detected and a feedback control to a diffraction angle of the acoustooptic device is performed. Also, without using a feedback control, an exit light and a diffraction light from the acoustooptic device are respectively received by two photodevice arrays and the photodevices are arranged in order to mutually compensate gaps between the photodevices, whereby a center of each photodevice is similarly made coincide with a peak of an optical beam to be received.

Abstract translation: 在包括光谱仪和光器件阵列以及光谱检测方法的光谱分析仪中，从检测衍射光的波长的光器件阵列检测到的光的波长偏差，或非衍射 检测来自声光装置的光，并执行对声光装置的衍射角的反馈控制。 此外，不使用反馈控制，来自声光装置的出射光和衍射光分别由两个光器件阵列接收，并且设置光器件以相互补偿光器件之间的间隙，由此类似地制造每个光器件的中心 与要接收的光束的峰值一致。