An ultra-narrow linewidth solution-processed organic laser

Light, Science & Applications
Oussama MhibikSebastien Chénais

Abstract

Optically pumped lasers based on solution-processed thin-film gain media have recently emerged as low-cost, broadly tunable, and versatile active photonics components that can fit any substrate and are useful for, e.g., chemo- or biosensing or visible spectroscopy. Although single-mode operation has been demonstrated in various resonator architectures with a large variety of gain media-including dye-doped polymers, organic semiconductors, and, more recently, hybrid perovskites-the reported linewidths are typically on the order of a fraction of a nanometer or broader, i.e., the coherence lengths are no longer than a few millimeters, which does not enable high-resolution spectroscopy or coherent sensing. The linewidth is fundamentally constrained by the short photon cavity lifetime in the standard resonator geometries. We demonstrate here a novel structure for an organic thin-film solid-state laser that is based on a vertical external cavity, wherein a holographic volume Bragg grating ensures both spectral selection and output coupling in an otherwise very compact (∼cm3) design. Under short-pulse (0.4 ns) pumping, Fourier-transform-limited laser pulses are obtained, with a full width at half-maximum linewidth of 900 MHz (1.25 pm)...Continue Reading

References

Aug 29, 1997·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
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Feb 29, 2008·Applied Optics·O M EfimovV I Smirnov
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Apr 17, 2014·The Journal of Physical Chemistry Letters·Felix DeschlerRichard H Friend

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Citations

May 14, 2020·Applied Optics·Guojun YangShuo Yang

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