CW and self-mode-locking performance of a red pumped Cr\u3csup\u3e3+\u3c/sup\u3e: LiSr0.8Ca0.2AlF6 laser

Reported is cw lasing and sub-100 femtosecond pulse generation in end-pumped Cr3+: LiSr0.8Ca0.2AlF6, a congruently melting compound intermediate between Cr3+: LiSrAlF6 and Cr3+: LiCaAlF6. Using a dispersion compensated cavity with no active or passive mode-locking elements in the cavity, self-sustained stable modelocked pulses of 90 fs duration at 140 MHz repetition frequency were initiated by rocking of the output coupler. © 1994