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Bright emission from a random Raman laser.

ABSTRACT: Random lasers are a developing class of light sources that utilize a highly disordered gain medium as opposed to a conventional optical cavity. Although traditional random lasers often have a relatively broad emission spectrum, a random laser that utilizes vibration transitions via Raman scattering allows for an extremely narrow bandwidth, on the order of 10?cm(-1). Here we demonstrate the first experimental evidence of lasing via a Raman interaction in a bulk three-dimensional random medium, with conversion efficiencies on the order of a few percent. Furthermore, Monte Carlo simulations are used to study the complex spatial and temporal dynamics of nonlinear processes in turbid media. In addition to providing a large signal, characteristic of the Raman medium, the random Raman laser offers us an entirely new tool for studying the dynamics of gain in a turbid medium.

SUBMITTER: Hokr BH

PROVIDER: S-EPMC4104439 | biostudies-other | 2014 Jul

REPOSITORIES: biostudies-other

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Bright emission from a random Raman laser.

Hokr Brett H BH Bixler Joel N JN Cone Michael T MT Mason John D JD Beier Hope T HT Noojin Gary D GD Petrov Georgi I GI Golovan Leonid A LA Thomas Robert J RJ Rockwell Benjamin A BA Yakovlev Vladislav V VV

Nature communications 20140711

Random lasers are a developing class of light sources that utilize a highly disordered gain medium as opposed to a conventional optical cavity. Although traditional random lasers often have a relatively broad emission spectrum, a random laser that utilizes vibration transitions via Raman scattering allows for an extremely narrow bandwidth, on the order of 10 cm(-1). Here we demonstrate the first experimental evidence of lasing via a Raman interaction in a bulk three-dimensional random medium, wi ...[more]

PMID: 25014073

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