Spectral and temporal characterizations of coupled-cavity mode locking in a KCl:Tl color center laser

The authors present experimental results on the spectral and temporal characteristics of a coupled-cavity mode-locked (CCM) KCl:Tl color center laser where a 2.8-m length of anomalously dispersive fiber was used in the control cavity. Under different operating conditions, both symmetrical and peak-featured spectra of the CCM laser were observed. Interrelationships between the spectral broadening and the cavity-length mismatch were determined experimentally.>