Abstract
We present an optical frequency comb generator (OFCG) based on a fiber ring laser that provides a bandwidth of over 1.8 THz with mode-locked pulse operation by external injection seeding. The OFCG was developed via a configuration with actively mode-locked fiber ring laser utilizing an acousto-optic modulator (AOM) with a carrier frequency of 150 MHz when an external seeding laser was injected into the fiber ring cavity. To our knowledge, our experimental device has the widest comb bandwidth ever reported for an OFCG based on a fiber ring loop adopting an AOM device, and ours is the first device that can operate with an actively mode-locked scheme.
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