Combined optical gain and degradation measurements in DCM2 doped Tris-(8-hydroxyquinoline)aluminum thin-films

Cehovski, Marko; Döring, Sebastian; Rabe, Torsten; Caspary, Reinhard; Kowalsky, Wolfgang

doi:10.1117/12.2227688

Cited by 1 publication

(2 citation statements)

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“…Figure 8a). The turning point corresponds with the modal gain maximum where the stimulated cross section is the highest [12,13]. The spectral width of the modal gain increases with increasing excitation energy density.…”

Section: Resultsmentioning

confidence: 99%

“…This is due to the Förster resonant energy transfer [9,10] where with decreasing donor/acceptor mean distance the probability of a resonant energy transfer increases. The great advantages of this material system are the broad optical laser tuning range of up to 115 nm, low lasing threshold down to approximately 3 J/cm 2 , and high optical gain, which saturates at about 300 cm −1 [11][12][13]. Moreover, the Alq 3 :DCM2 thin-film is characterized by its absolutely smooth surface after the vapor deposition process.…”

Section: The Organic Thin-film Lasermentioning

confidence: 99%

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Single-Mode Polymer Ridge Waveguide Integration of Organic Thin-Film Laser

et al. 2020

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Organic thin-film lasers (OLAS) are promising optical sources when it comes to flexibility and small-scale manufacturing. These properties are required especially for integrating organic thin-film lasers into single-mode waveguides. Optical sensors based on single-mode ridge waveguide systems, especially for Lab-on-a-chip (LoC) applications, usually need external laser sources, free-space optics, and coupling structures, which suffer from coupling losses and mechanical stabilization problems. In this paper, we report on the first successful integration of organic thin-film lasers directly into polymeric single-mode ridge waveguides forming a monolithic laser device for LoC applications. The integrated waveguide laser is achieved by three production steps: nanoimprint of Bragg gratings onto the waveguide cladding material EpoClad, UV-Lithography of the waveguide core material EpoCore, and thermal evaporation of the OLAS material Alq3:DCM2 on top of the single-mode waveguides and the Bragg grating area. Here, the laser light is analyzed out of the waveguide facet with optical spectroscopy presenting single-mode characteristics even with high pump energy densities. This kind of integrated waveguide laser is very suitable for photonic LoC applications based on intensity and interferometric sensors where single-mode operation is required.

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Section: Resultsmentioning

confidence: 99%