CPC G02B 6/02295 (2013.01) [C03B 37/01211 (2013.01); C03B 37/027 (2013.01); C03B 37/02763 (2013.01); G02B 6/02376 (2013.01); H01S 3/06716 (2013.01); H01S 3/06745 (2013.01); C03B 2201/10 (2013.01); C03B 2201/12 (2013.01); C03B 2201/28 (2013.01); C03B 2201/31 (2013.01); C03B 2203/20 (2013.01); C03B 2203/22 (2013.01)] | 21 Claims |
1. An optical fiber, comprising:
a core doped with one or more active ions to guide signal light from an input end of the optical fiber to an output end of the optical fiber;
a cladding surrounding the core to guide pump light from the input end of the optical fiber to the output end of the optical fiber; and
one or more inserts formed in the cladding surrounding the core,
wherein the core has a geometry that varies along a longitudinal length of the optical fiber, and
wherein the geometry of the core is varied along the longitudinal length of the optical fiber to cause an absorption of the pump light to be modulated along the longitudinal length of the optical fiber,
wherein the geometry of the core that varies along the longitudinal length of the optical fiber comprises a cross-sectional size of the core that increases from the input end to the output end of the optical fiber.
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