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A widely tunable optoelectronic oscillator based on balanced detection is proposed and experimentally demonstrated. A frequency tunable range from 4 GHz to 16 GHz is achieved. The phase noise of the generated signal is reduced to about −105 dBc/Hz.
Graphene has attracted a lot of research interest, especially as a saturable absorber (SA). However, improvement on thermal damage threshold is critical for the SA. Here, graphene covered on the microfiber is developed for this purpose by use of the light–graphene interaction via the evanescent field of the guided mode in the microfiber. Such interaction is numerically studied by using the theory...
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