Abstract
Programmable random lasing pulses are highly desired due to their promising applications in information security, flexible encoding system, and smart imaging. However, the fixed random scattering configuration hinders their realization. Herein, a programmable random laser is proposed and fabricated based on the external waveguide-assisted random scattering feedback. The various pulse time series of random lasing can be flexibly realized by switching the adhesion/separation state between the gain and the destroyed waveguide structure and further be proposed to built dynamic optical barcodes and flexible information encryption system. The results may widely expand the application prospects of random lasers in the fields of optical data recording, dynamic security labels, smart sensing and flexible imaging.
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