Micro-LED pumped polymer laser: a discussion of future pump sources for organic lasers

Johannes Herrnsdorf, Yue Wang, Jonathan McKendry, Zheng Gong, David Massoubre, Benoit Jack Eloi Guilhabert, Georgios Tsiminis, Graham A Turnbull, Ifor D. W. Samuel, Nicolas Laurand, Erdan Gu, Martin Dawson

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44 Citations (Scopus)
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Abstract

Optical pumping conditions for organic solid-state lasers (OSLs) are discussed with particular emphasis on the use of gallium nitride based light-emitting diodes (LEDs) as pump sources. LEDs operate in a regime where the pump should be optimized for a short rise time and high peak intensity, whereas fall time and overall pulse duration are less important. Lasers pumped with this approach need to have very low thresholds which can now be routinely created using (one-dimensional) distributed feedback lasers. In this particular case stripe-shaped excitation with linearly polarized light is beneficial. Arrays of micron-sized flip-chip LEDs have been arranged in an appropriate stripe shape and the array dimensions were chosen such that the divergence of LED emission does not cause a loss in peak intensity. These micro-LED arrays have successfully been used to pump OSLs with thresholds near 300 W/cm2 (∼9 ns rise time, 35 ns pulse duration), paving the way for compact arrays of indirectly electrically pumped OSLs.
Original languageEnglish
Pages (from-to)1065-1078
Number of pages14
JournalLaser and Photonics Reviews
Volume7
Issue number6
Early online date17 Sep 2013
DOIs
Publication statusPublished - Nov 2013

Keywords

  • organic semiconductor laser
  • light-emitting diode
  • indirect electrical pumping
  • hybrid organic/inorganic optoelectronics

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