2 results about "Optical circulators" patented technology

We provide an optical circulator that can easily detect damage to the polarizer. [Solution] The device comprises a first port P1 into which light is incident, a second port P2 from which light incident from the first port P1 is emitted, a third port P3 positioned so as not to be located on a straight line connecting the first port P1 and the second port P2, from which light incident from the second port P2 is emitted, a first polarizer 5 positioned on the first port P1 side, a second polarizer 6, a third polarizer 7 positioned on the second port P2 side and positioned together with the first polarizer 5 to sandwich the second polarizer 6, and a Faraday rotator 8 positioned between the second polarizer 6 and the third polarizer 7, and a light emission section 3 in which the first polarizer 5 and the second polarizer 6 are positioned, and a portion of the light incident from the first port P1, passing through the first polarizer 5 and incident on the second polarizer 6 is reflected and emitted as reflected light.

This utility model relates to an integrated module for a polarization-independent optical circulator and filter, comprising a first collimator, a circulator core, a second collimator, and a third collimator. This utility model employs a first corner prism, a second corner prism, a first filter, a second filter, and a first and second collimator in combination, reducing the number of collimators used. The application of the first and second corner prisms ensures that the angle of the signal light emitted from the corner prism remains unchanged even when the angle of the corner prism changes during actual assembly and use, reducing angular coupling loss and improving the stability and reliability of assembly and use. This design makes the optical path layout of the device more compact, reduces the number of required optical components, and simultaneously improves the reliability and stability of the product.