Optical filter with spectrum analysis function and implementation method thereof

Abstract

The invention discloses an optical filter with the spectrum analysis function and an implementation method thereof. The implementation method comprises the following steps that optical signals enter a polarization conversion unit through an optical circulator and a collimator array to be converted to be of the same polarization state; beam expanding is performed in the X direction through an optical signal beam expanding unit, and beams are projected to diffraction gratings; chromatic dispersion is performed through the diffraction gratings according to different wavelengths, and the beams are reflected to a third-column cylindrical lens in the X direction and injected onto a triangular reflector with a driving mechanism; a control unit controls the driving mechanism to change the position of the triangular reflector so that the triangular reflector can only reflect the optical signals of the wavelength corresponding to the position of the triangular reflector; the reflected optical signals are returned back to the collimator array according to the original path, and output to the optical circulator through the collimator array, an optical detection unit detects the wavelength and light intensity of the optical signals output by the optical circulator, and a continuous spectrogram is obtained through recording. Spectrum analysis is achieved on the optical filter, and the application range of the optical filter is greatly enlarged.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to an optical filter with spectrum analysis function and its realization method. Background technique [0002] Optical filters and spectrum analyzers are commonly used optical signal devices. With the rapid development of optical communication technology, tunable optical filters have become indispensable optical devices in optical communication systems. [0003] As we all know, both optical filters and spectrum analyzers are based on the principle of light modulation, resulting in similarities between optical filtering technology and spectrum analysis technology. However, none of the existing tunable optical filters has the function of spectral analysis. Therefore, if the spectral analysis function can be realized on the tunable optical filter, the applicable range of the tunable optical filter will be greatly increased. Contents of the invention [0004] The technical proble...

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Problems solved by technology

However, none of the existing tunable optical filters has the function of spectral analysis. Therefore, if the spectral analysis function can be realized on the tunable optical filter, the applicable range of the tunable optical filter will be greatly increased.

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