27 August 2009 Solid-state organic DFB laser in near-infrared wavelength region
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Solid-state dye-doped polymeric distributed-feedback lasers in near-infrared wavelength region were fabricated by photo nanoimprint lithography. Fluorinated-polyimide material which shows low propagation loss in the near infrared was used as the host matrix of the active waveguide doped with near-infrared organic dye, LDS950. Single wavelength lasing emission at 953 nm, which corresponds to the second-order Bragg reflection for the grating, was observed at room temperature from the laser by photo-pumping using nitrogen-gas laser. When the ambient temperature is raised, the lasing wavelength shifts to shorter at a ratio of 0.094 nm/K between 20 and 50°C, as the effective refractive index of the active region becomes smaller. The lasing threshold pumping density stays nearly constant during the temperature variation.
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S. Yuyama, S. Yuyama, T. Watanabe, T. Watanabe, K. Yamashita, K. Yamashita, K. Oe, K. Oe, } "Solid-state organic DFB laser in near-infrared wavelength region", Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 741517 (27 August 2009); doi: 10.1117/12.824843; https://doi.org/10.1117/12.824843

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