Electrically injection-locked quantum dash frequency-modulated comb

Inter-mode beat frequency tuning of a quantum dash comb laser by electrical injection locking is presented. Frequency-modulated comb generation at 6350 cm-1 (1575 nm, telecom L-band) is confirmed by beat note spectroscopy. A 1.8 MHz wide beat frequency tuning range, injection power and injection frequency dependent beat frequency locking are sup-ported by a coupled oscillator model extended with a noise term.