Tilted fiber bragg grating comb polarizer

The invention provides a tilted fiber bragg grating comb polarizer. The polarizer comprises a broadband light source, an optical circulator, an inclined fiber bragg grating polarizing element and twospectrometers, the inclined fiber bragg grating polarizing element is composed of a reflected light coupling element and an inclined fiber bragg grating, the surface of a cladding of the inclined fiber bragg grating is coated with a nano material, and the reflected light coupling element comprises a multimode optical fiber, a fine-core optical fiber or a coreless optical fiber; the strong polarization dependence characteristic of TE and TM polarized light on the nano material is utilized; the inclined fiber bragg grating polarizing element excites a reversely-transmitted narrow-band TE polarization leakage mode and a forwards-transmitted narrow-band TM polarization leakage mode at the resonant wavelength position, the reversely-transmitted TE polarization leakage mode is collected throughthe reflected light coupli