All-optical fiber isolator using optical fiber incorporated with Quantum dots

摘要

An optical isolator comprising an optical fiber serving as an optical waveguide for propagating incident light, a polarizer for polarizing the incident light, and a Faraday rotator for rotating the polarization plane polarized in the polarizer by 45 degrees, Optical element exhibiting a magnetooptical effect enough to be used as an optical isolator at a visible light wavelength by containing quantum dots in the inner cladding layer and / or the inner cladding layer.