Abstract
This Article describes the effect of the excitation wavelength on the spectra of random laser emission obtained in a dye-doped polymeric system, composed of a PMMA layer and a laser dye exhibiting a bichromatic gain profile, the 3-(2,2-dicyanoethenyl)-1-phenyl-4,5-dihydro-1H-pyrazole (DCNP). We are showing that the change of pumping wavelength can be used to switch the laser emission between particular lasing bands and control the relative intensity between them if the bichromatic light amplification is achieved. We present that the random lasing phenomenon can strongly influence the resulting bichromatic emission, randomly selecting the dominating lasing band. Mentioned random band switching behavior was investigated using a statistical approach, indicating that the obtained distribution is dependent on the excitation wavelength. This feature can be used to design new types of laser-based optical random number generators that can find applications in integrated optical logic devices. To the best of the authors’ knowledge, this is the first demonstration of an optical random number generator based on the bichromatic laser dye described in the literature.
Highlights
This Article describes the effect of the excitation wavelength on the spectra of random laser emission obtained in a dye-doped polymeric system, composed of a PMMA layer and a laser dye exhibiting a bichromatic gain profile, the 3-(2,2dicyanoethenyl)-1-phenyl-4,5-dihydro-1H-pyrazole (DCNP)
We have demonstrated that luminescent dyes exhibiting gain in two separated spectral regions might be utilized as optical random number generators, if they are constituting the gain medium for random laser operation
The relative gain of such a system can be controlled by excitation wavelength, while random feedback is responsible for randomizing an emission process
Summary
This Article describes the effect of the excitation wavelength on the spectra of random laser emission obtained in a dye-doped polymeric system, composed of a PMMA layer and a laser dye exhibiting a bichromatic gain profile, the 3-(2,2dicyanoethenyl)-1-phenyl-4,5-dihydro-1H-pyrazole (DCNP). As the process of RL is highly random, the evolution of emission spectra concerning excitation wavelength change was performed in a series of 100 laser shots for the same pumping conditions.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
