Method for making single-polorization, single mode optical fibers

A method of manufacturing a single-polarization single-mode optical fiber comprising the steps of:

• preparing a core-cladding assembly including a core member made of silica glass having a first index of refraction, and a cladding member substantially uniformly surrounding said core member and made of silica glass having a second index of refraction smaller than said first index of refraction;
• applying a jacket member about said cladding member to surround the same, said jacket member being made of silica glass;
• disposing at least one stress applying member comprised of silica glass between an outer periphery of said cladding member and said jacket, wherein each of said stress applying members is disposed at discrete intervals about said outer periphery of said cladding member;
• and
• drawing a resulting assembly to bond together said core, cladding, stress applying members and said jacket into an integral optical fiber;
• wherein said stress applying members cause material stresses in said core so as to change the optical properties of said optical fiber.