Figure 1
From: Low-noise tunable deep-ultraviolet supercontinuum laser

Experimental set-up: L1, L2, L3 = anti-reflection coated UV-fused silica plano-convex lens, L4 = uncoated calcium fluoride plano-convex lens, W1 = anti-reflection coated UV fused silica plane window, W2 = uncoated calcium fluoride plane window, DM = dispersive mirror, OAP = UV-enhanced aluminium off-axis parabolic mirror, BPF = spectral band-pass filter.