Passive detection type Fourier spectrometer device for laser 2N-time optical path sampling

• Main Authors: YANG QIUJIE, HE ZHIPING, LUAN YIFEI, WANG XIANG, LI FEIFEI
• Format: Patent
• Language: Chinese; English
• Published: 11.10.2022
• Subjects: COLORIMETRY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; PHYSICS; RADIATION PYROMETRY; TESTING

The invention discloses a passive detection type Fourier spectrometer device for laser 2N-time optical path sampling. The device is based on the Nyquist sampling theorem, the isoclinal interference technology and the self-alignment technology, a core interference module adopts the common-optical-path design of a laser interferometer and a target signal interferometer, and through the aperture splitting design of a beam splitter, the parallel plate design of a laser interference arm plane mirror and the self-alignment design of the beam splitter and an interference arm, the target signal interferometer can be detected. 2N times of turn-back is introduced into a laser interference light path to obtain 2N times of sampling light path, so that the selectable wavelength range of a laser is increased, the 2N times of light path sampling laser interferometer provides sampling pulse of a target interferometer, a redundant discrete intensity value of a target is obtained, spectral information of the target is obtained