TY - GEN
T1 - Two photon induced lasing in 1550 nm quantum dash optical gain media
AU - Capua, A.
AU - Saal, A.
AU - Reithmaier, J. P.
AU - Yvind, K.
AU - Eisenstein, G.
PY - 2011
Y1 - 2011
N2 - We report on a unique lasing mechanism observed in quantum dash Gain media. While the gain media is electrically pumped below lasing threshold, a strong optical pulse excites carriers by two photon absorption into high energy states of the quantum dashes and wetting layer. Fast inter band carrier relaxation and capture processes into the ground states of the quantum dashes result in increased gain followed by lasing at the gain peak irrespective of the stimulating pulse wavelength. The temporal response of the lasing line is examined on a 40 GHz scope and full characterization of the pulse by the XFROG scheme is performed. We show the lasing mechanism to be governed mainly by the wetting layer dynamics and extract a direct measurement of the carrier-carrier scattering time constant.
AB - We report on a unique lasing mechanism observed in quantum dash Gain media. While the gain media is electrically pumped below lasing threshold, a strong optical pulse excites carriers by two photon absorption into high energy states of the quantum dashes and wetting layer. Fast inter band carrier relaxation and capture processes into the ground states of the quantum dashes result in increased gain followed by lasing at the gain peak irrespective of the stimulating pulse wavelength. The temporal response of the lasing line is examined on a 40 GHz scope and full characterization of the pulse by the XFROG scheme is performed. We show the lasing mechanism to be governed mainly by the wetting layer dynamics and extract a direct measurement of the carrier-carrier scattering time constant.
UR - http://www.scopus.com/inward/record.url?scp=85088718986&partnerID=8YFLogxK
U2 - 10.1364/ecoc.2011.tu.6.lesaleve.4
DO - 10.1364/ecoc.2011.tu.6.lesaleve.4
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AN - SCOPUS:85088718986
SN - 9781557529312
T3 - Optics InfoBase Conference Papers
BT - European Conference and Exposition on Optical Communications, ECOC 2011
PB - Optical Society of America (OSA)
T2 - European Conference and Exposition on Optical Communications, ECOC 2011
Y2 - 18 September 2011 through 22 September 2011
ER -