Wavelength-tunable prism-coupled external cavity passively mode-locked quantum-dot laser*
Wu Yan-Hua, Jian Wu, Jin Peng†, Wang Fei-Fei, Hu Fa-Jie, Wei Heng, Wang Zhan-Guo
       
Optical spectra of the wavelength-tunable EC mode-locked QD laser under 140-mA current applied to the gain device.