Abstract

Near-infrared optical gain in luminescent polymeric slab asymmetric waveguides has been investigated by use of amplified spontaneous emission. Upon nanosecond photopumping, the waveguides have shown a small-signal gain coefficient of 37.2 ± 2.1 cm−1 at 820 nm for a pump fluence of 1.57 mJ/cm2 (314 kW/cm2). We show that a small-signal gain of 19.7 ± 2.3 dB is achievable in a 1.2-mm-long waveguide.

© 2008 Optical Society of America

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