| http://www.w3.org/ns/prov#value | - Another aspect of the present invention is a method of forming a linear polarization-maintaining optical fiber for use in an amplifier, the method comprising the steps of: providing a rare-earth-doped non-polarization-maintaining optical fiber having one or more cladding layers, a diameter and a random birefringence; providing a mandrel having a selected diameter; coiling the non-polarization-main
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