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. 2017 Apr 28;3(4):e1602570. doi: 10.1126/sciadv.1602570

Fig. 4. Lasing properties of organic DFB lasers in the long-pulse regime.

Fig. 4

(A) Streak camera images showing laser emission integrated over 100 pulses from an encapsulated mixed-order DFB device using a BSBCz:CBP (20:80 wt %) film as gain medium and optically pumped by pulses of 30 ms and 2.0 kW cm−2 (top) or 800 μs and 200 W cm−2 (bottom). (B) Photograph of DFB device operating in the long-pulse regime (excitation, 30 ms). (C) Lasing threshold (Eth) in various DFB devices as a function of excitation duration. Dotted lines serve as visual guidelines. (D) Change in laser output intensity from organic DFB lasers as a function of the number of incident pulses (100 μs and 200 W cm−2).