Fig. 1.
Schematic of the single-mode diode-pumped Cr3+:LiCAF laser used in multi-photon microscopy experiments. D1–D4: Single-mode pump diodes at 660 nm, HR: 45° high reflectors at 660 nm, f: visible achromatic doublets with a focal length of 65 mm, PBS: polarizing beam splitter cube, M1–M2: pump mirrors with R = 75 mm, M3: flat high reflector, M4: curved high reflector with R = 150 mm, OC: 2% output coupler, DCM1–DCM3: flat double-chirped mirrors with ~−50 fs2 dispersion per bounce, SESAM/SBR: semiconductor saturable absorber mirror/saturable Bragg reflector. Dashed lines indicate the mode-locked laser cavity.
