| http://www.w3.org/ns/prov#value | - Various embodiments of the invention include an optical isolator, comprising an input module including an input fiber, an input polarizer, and an input collimator, a state of polarization rotator module, and an output module including an output fiber having a facet, a beam expanding device, an output polarizer, and an output collimator, the beam expanding device configured to prevent damage to the
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