METHOD FOR COMPENSATING FOR WAVELENGTH SHIFT IN WAVELENGTH SELECTIVE SWITCH, AND DEVICE THEREFOR

摘要

A method for compensating for a wavelength shift in a wavelength selective switch (WSS), and a device therefor. The device comprises a fixed seat (301) as well as a rotation beam (304) and a compensation block (302) that have different thermal expansion amounts, the rotation beam (304) and the compensation block (302) being fixedly adhered to the fixed seat (301). In the method, a combined structure of the rotation beam (304) and the compensation block (302) with different thermal expansion amounts is adopted; the combined structure rotates by means of different expansion amounts generated by the rotation beam (304) and the compensation block (302) at the same external temperature, and further drives an optical element of the WSS to rotate, hence compensating for a wavelength shift of the WSS. The method is safe and reliable; the device has a simple structure, and is convenient to encapsulate, is applicable to various WSS optical paths, and does not affect advantages of the optical path structure of the WSS.

主权项

1. A compensation method for wavelength shift of WSS comprising the following steps:
measuring the direction and amount of wavelength shift of WSS; adopting a composite structure of rotating beam and compensation blocks with different thermal strokes; gluing the composite structure to the side of collimating lens of WSS or the back of the reflecting surface of the reflector of WSS; neutralizing the wavelength shift direction with the rotating direction of the composite structure, and equalizing the wavelength compensation dosage of the composite structure with the measured amount of wavelength shift of WSS.