Tunable Two-Color Lasing Emission Based on Fabry-Pérot Laser Diode Combined With External Cavity Feedback

Tunable Two-Color Lasing Emission Based on Fabry-Pérot Laser Diode Combined With External Cavity Feedback

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In this paper, two-color lasing emission is experimentally demonstrated by employing a multimode Fabry-Pérot laser diode (MMFP-LD) associated with external cavity of two tunable filters and an erbium-doped fiber amplification (EDFA), whose difference frequency is quasi-continuously tunable from read more several hundred GHz to more than 2 THz.The obtained side-mode suppression ratio (SMSR) in the output spectrum is around $sim$20 dB, and the modulation depth of simulated beat signal converted by two emission modes rapidly decayed as increasing the frequency separation.In catherine lansfield ombre rainbow clouds eyelet curtains addition, optical behaviors induced by mode competition and four-wave mixing are observed and discussed, while the difference frequency was shortened to GHz regime.