Ultrafast refractive index dynamics in AlGaAs diode laser amplifiers

Ultrafast refractive index dynamics in AlGaAs diode laser amplifiers were studied using 440 fs optical pulses. Refractive index changes consistent with a free carrier heating model proposed to explain earlier studies of gain dynamics in diode lasers are exhibited. We also observe an apparently instantaneous refractive index change that corresponds to an n2⊥ of −5×10−12 cm2/W.

[1]  N. Olsson,et al.  Self-phase modulation and spectral broadening of optical pulses in semiconductor laser amplifiers , 1989 .

[2]  山本 喜久,et al.  Coherence, amplification, and quantum effects in semiconductor lasers , 1991 .

[3]  Wilson Sibbett,et al.  Observations of ultrafast nonlinear refraction in an InGaAsP optical amplifier , 1991 .

[4]  Gadi Eisenstein,et al.  Femtosecond gain dynamics in InGaAsP optical amplifiers , 1990 .

[5]  C. Henry.  Theory of the linewidth of semiconductor lasers , 1982 .

[6]  M. Osiński,et al.  Linewidth broadening factor in semiconductor lasers--An overview , 1987 .

[7]  James G. Fujimoto,et al.  Femtosecond measurements of the nonresonant nonlinear index in AlGaAs , 1990 .

[8]  A. VanderLugt,et al.  Optical Signal Processing , 1990 .

[9]  James G. Fujimoto,et al.  Femtosecond dynamics of the nonlinear index near the band edge in AlGaAs waveguides , 1990 .

[10]  Charles Howard Henry,et al.  Spectral dependence of the change in refractive index due to carrier injection in GaAs lasers , 1981 .

[11]  James G. Fujimoto,et al.  Femtosecond all‐optical switching in AlGaAs waveguides using a time division interferometer , 1989 .

[12]  W. Elsasser,et al.  Four-wave mixing in GaAs/AlGaAs semiconductor lasers , 1989 .

[13]  Erich P. Ippen,et al.  Subpicosecond gain dynamics in GaAlAs laser diodes , 1987 .

[14]  T. Koch,et al.  Effect of nonlinear gain reduction on semiconductor laser wavelength chirping , 1986 .