Abstract
The intensity and phase of ultrashort optical pulses from a 40-GHz monolithic InGaAsP quantum-well heterostructure laser diode are retrieved for the first time from two-photon absorption pulse spectrograms. The pulse traces showing the mode-locked pulses from the laser are distorted due to ultrafast absorption saturation associated with quantum-confined Stark excitons. It is suggested from comparison between experimental time-integrated spectrum and reconstructed pulse spectrum that the mode-locked pulses are formed only from a part of the longitudinal modes in the laser cavity.
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Ogawa, K., Kunimatsu, D., Suzuki, A. et al. Pulse characterisation of a quantum-well mode-locked laser diode by two-photon absorption frequency-resolved optical gating. Optical and Quantum Electronics 33, 727–733 (2001). https://doi.org/10.1023/A:1017563230949
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DOI: https://doi.org/10.1023/A:1017563230949