Ultrafast refractive-index dynamics in a multiquantum-well semiconductor optical amplifier

H.J.S. Dorren; X. Yang; D. Lenstra; H. Waardt, de; G.D. Khoe; T. Simoyama; H. Ishikawa; H. Kawashima; T. Hasama

doi:10.1109/LPT.2003.811332

Ultrafast refractive-index dynamics in a multiquantum-well semiconductor optical amplifier

H.J.S. Dorren, X. Yang, D. Lenstra, H. Waardt, de, G.D. Khoe, T. Simoyama, H. Ishikawa, H. Kawashima, T. Hasama

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

We investigate ultrafast refractive index dynamics in a multiquantum-well InGaAsP-InGaAs semiconductor optical amplifier that is operated in the gain regime by using a pump-and-probe approach. The pump-and-probe pulses are cross-linearly polarized. We observe a phase shift of 200 degrees if the amplifier is pumped with 120 mA of current but find that the phase shift vanishes if the injection current is increased to 160 mA. Our results indicate a contribution of two-photon absorption to the nonlinear phase shift that opposes the phase shift introduced by the gain. Finally, we observe that the phase shift comes up and disappears within a picosecond.

Original language	English
Pages (from-to)	792-794
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	15
Issue number	6
DOIs	https://doi.org/10.1109/LPT.2003.811332
Publication status	Published - 2003

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title = "Ultrafast refractive-index dynamics in a multiquantum-well semiconductor optical amplifier",

abstract = "We investigate ultrafast refractive index dynamics in a multiquantum-well InGaAsP-InGaAs semiconductor optical amplifier that is operated in the gain regime by using a pump-and-probe approach. The pump-and-probe pulses are cross-linearly polarized. We observe a phase shift of 200 degrees if the amplifier is pumped with 120 mA of current but find that the phase shift vanishes if the injection current is increased to 160 mA. Our results indicate a contribution of two-photon absorption to the nonlinear phase shift that opposes the phase shift introduced by the gain. Finally, we observe that the phase shift comes up and disappears within a picosecond.",

author = "H.J.S. Dorren and X. Yang and D. Lenstra and {Waardt, de}, H. and G.D. Khoe and T. Simoyama and H. Ishikawa and H. Kawashima and T. Hasama",

year = "2003",

doi = "10.1109/LPT.2003.811332",

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pages = "792--794",

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T1 - Ultrafast refractive-index dynamics in a multiquantum-well semiconductor optical amplifier

AU - Dorren, H.J.S.

AU - Yang, X.

AU - Lenstra, D.

AU - Waardt, de, H.

AU - Khoe, G.D.

AU - Simoyama, T.

AU - Ishikawa, H.

AU - Kawashima, H.

AU - Hasama, T.

PY - 2003

Y1 - 2003

N2 - We investigate ultrafast refractive index dynamics in a multiquantum-well InGaAsP-InGaAs semiconductor optical amplifier that is operated in the gain regime by using a pump-and-probe approach. The pump-and-probe pulses are cross-linearly polarized. We observe a phase shift of 200 degrees if the amplifier is pumped with 120 mA of current but find that the phase shift vanishes if the injection current is increased to 160 mA. Our results indicate a contribution of two-photon absorption to the nonlinear phase shift that opposes the phase shift introduced by the gain. Finally, we observe that the phase shift comes up and disappears within a picosecond.

AB - We investigate ultrafast refractive index dynamics in a multiquantum-well InGaAsP-InGaAs semiconductor optical amplifier that is operated in the gain regime by using a pump-and-probe approach. The pump-and-probe pulses are cross-linearly polarized. We observe a phase shift of 200 degrees if the amplifier is pumped with 120 mA of current but find that the phase shift vanishes if the injection current is increased to 160 mA. Our results indicate a contribution of two-photon absorption to the nonlinear phase shift that opposes the phase shift introduced by the gain. Finally, we observe that the phase shift comes up and disappears within a picosecond.

U2 - 10.1109/LPT.2003.811332

DO - 10.1109/LPT.2003.811332

M3 - Article

VL - 15

SP - 792

EP - 794

JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

SN - 1041-1135

IS - 6

ER -