Ultralow noise and supermode suppression in an actively mode-locked external-cavity semiconductor diode ring laser
Abbreviated Journal Title
We report what is to our knowledge the lowest phase and amplitude noise characteristics achieved to date in a 10-GHz pulse train produced by the active harmonic mode locking of an external-cavity semiconductor diode laser. Supermode noise has also been suppressed below -140 dBc/Hz by use of a high-finesse fiber Fabry-Perot etalon as an intracavity filter. Novel noise sideb(C)and measurements that extend to the Nyquist offset frequency suggest a significant advantage in using harmonic (rather than fundamental) mode locking to produce ultralow-noise pulse trains, owing to the relationship between the noise roll-off frequency and the fundamental cavity frequency. (C) 2002 Optical Society of America.
"Ultralow noise and supermode suppression in an actively mode-locked external-cavity semiconductor diode ring laser" (2002). Faculty Bibliography 2000s. 3153.