Paper
20 September 2023 Emission properties of random lasers with scatterer distribution formed by optical trapping
Takashi Kaku, Naomichi Yokoi, Takashi Okamoto
Author Affiliations +
Abstract
A method to change the scatterer distribution of a random laser medium using the optical trapping technique is proposed. By focusing trapping beams into small regions of the scattering medium, some scattering particles are concentrated in those regions, causing inhomogeneous distribution of scatterers. We investigate the effect of the scatterer distribution formed by optical trapping on the emission spectrum of a random laser. Experimental results show that the spectral spike intensity of random lasers with trapped particles is higher than that for the random lasers without trapped particles. Furthermore, the spectral spike intensity depends on the power of the trapping spot. The relationship between the number and the intensity of spikes in the emission spectra shows a feature observed in other random lasers with inhomogeneous scatterer distributions.
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Takashi Kaku, Naomichi Yokoi, and Takashi Okamoto "Emission properties of random lasers with scatterer distribution formed by optical trapping", Proc. SPIE 12606, Optical Manipulation and Structured Materials Conference, 126060M (20 September 2023); https://doi.org/10.1117/12.3008339
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KEYWORDS
Random lasers

Atmospheric particles

Optical tweezers

Emission spectrum

Laser scattering

Particles

Inhomogeneities

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