摘要 |
This disclosure relates to polarizing optical fibers and polarization maintaining optical fibers, including active and/or passive implementations. At least one embodiment includes a polarizing (PZ) optical fiber. The fiber includes stress applying parts (SAPs) disposed in a first cladding region, the SAPs comprising a material with a thermal expansion coefficient, αSAP. A core region is at least partially surrounded by cladding features and the SAPs. The core includes a glass with a thermal expansion coefficient, αcore. The arrangement of the SAPs satisfies the relations: Rsc = dSAP /Dsc, where Dsc is the SAP center to core center distance, and dSAP is the average SAP diameter, and dα = lαSAP- α corel- In various embodiments, Rsc and dα are sufficiently large to induce stress birefringence into the core and to provide for a polarized output. Active fibers in which a portion of the fiber is doped may be implemented for application in fiber lasers, fiber amplifiers, and/or optical pulse compressors. |