Optics Express
Direct observation of the coherent spectral hole in the noise spectrum of a saturated InAs/InP quantum dash amplifier operating near 1550 nm
Amir Capua, Vissarion Mikhelashvili, G. Eisenstein, Johann Peter Reithmaier, A. Somers, A. Forchel, M. Calligaro, O. Parillaud, M. Krakowski