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Wang, Ting; Wu, Ji-Liang; Yang, Ke; Yang, Yue-De; Xiao, Jin-Long; Huang, Yong-Zhen
IEEE photonics technology letters, 03/2022, Letnik: 34, Številka: 6Journal Article
A highly coherent and flat optical frequency comb (OFC) based on an optoelectronic oscillator (OEO) is presented using a dual-mode microcavity laser. In this scheme, the microcavity laser is applied as a light source and a photonic microwave filter simultaneously. The dual-mode is phase-locked in the self-injection OEO configuration. Meanwhile, a 10-tones OFC with a frequency spacing of 28.8 GHz is generated without an external microwave source. The generated OFC is further broadened through a parametric frequency mixer by the dispersion compensation and nonlinear expansion technique. Forty-three optical tones with a 5-dB power variation spanning over 10 nm are obtained.
