We propose a broadband optical frequency comb generator using an injection-locking fiber ring laser with single phase modulator within ring cavity and highly nonlinear fiber as spectrum expander based on cascaded four-wave mixing, a stable 20-GHz optical comb of 201 comb lines within 30-dB power deviation, spanning 40 nm bandwidth, is achieved only using one stage spectrum expander including a 1-Km long highly nonlinear fiber.

© 2018 The Author(s)

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