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Enhanced gain in photonic crystal amplifiers

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5 Author(s)
Sara Ek ; DTU-Fotonik - Department of Photonic Engineering, Denmark Technical University, building 345, DK2800, Kongens Lyngby, Denmark ; Elizaveta Semenova ; Per Lunnemann ; Kresten Yvind
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We experimentally demonstrate enhanced gain in the slow-light regime of quantum well photonic crystal amplifiers. A strong gain enhancement is observed with the increase of the group refractive index, due to light slow-down. The slow light enhancement is shown in an amplified spontaneous emission study of a 1 QW photonic crystal amplifier. Net gain is achieved which enables laser oscillation in photonic crystal micro cavities. The ability to freely tailor the dispersion in a semiconductor optical amplifier makes it possible to raise the optical gain considerably over a certain bandwidth. These results are promising for short and efficient semiconductor optical amplifiers. This effect will also benefit other devices, such as mode locked lasers.

Published in:

2012 14th International Conference on Transparent Optical Networks (ICTON)

Date of Conference:

2-5 July 2012