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
       
RF spectral trace for mode locking under 120-mA current at 1166.2-nm wavelengths: (a) 3-GHz scan range, measured with a resolution bandwidth of 100 kHz; (b) 0.6-MHz scan range measured with a resolution bandwidth of 30 kHz.