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Continuously tunable polymer membrane laser

: Berdin, A.; Rekola, H.; Sakhno, O.; Wegener, M.; Primagi, A.

Volltext ()

Optics Express 27 (2019), Nr.18, S.25634-25646
ISSN: 1094-4087
European Commission EC
H2020; 679646; PHOTOTUNE
Tunable Photonic Structures via Photomechanical Actuation
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
VIP; 03V0881; EDEL
Validierung elektrisch durchstimmbarer elastischer Beugungsgitter und DFB-Laser
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IAP ()
DFB thin film laser; tunable coherent light sources; plasticizers; polymers; holographic surface relief gratings

Thin-film organic distributed feedback (DFB) lasers processed with elastomeric polymers allow fabrication of flexible and continuously tunable coherent light sources. So far, the realized laser devices fall short on broad continuous tuning range. We demonstrate that the addition of plasticizers to the polymer matrix and the minimization of the thickness of the laser can reduce mechanical impact and, thus, extend the wavelength tuning range to the full gain range of the active medium. A contact-transfer method is used to transfer gently the ultra-thin membrane DFB laser to a silicone support. A continuous tuning of the laser wavelength up to 77 nm in the orange-red spectral range of a single laser dye was achieved by mechanical stretching of the supporting film with a DFB membrane laser on top.