Characterisation of a cw titanium-doped sapphire laser mode-locked with a linear external cavity

Stable Modelocking of a Coupled Cavity Moving Mirror Ring Dye Laser

“…Experiments revealed that the pulse length was very sensitive to the cavity length of the two external arms, as found by the previous studies of coupled cavity moving mirror modelocking [3][4][5] . For example, when the external arm with the moving mirror is lengthened by 0 .…”

“…If this measurement represents the true single-pulse bandwidth, then the pulses could be significantly shortened with dispersion compensation [4] . However, the pulses may not in fact be exact replicas of each other with some shifting or jitter taking place in frequency space due to the dynamic cavity length .…”

“…With the shutter sampling only the modelocked envelope, 20 mW of average power was obtained . Future studies will use the synchronous shutter to sample different portions of the envelope to look at the pulse length as a function of mirror velocity as was done in the Ti :sapphire investigation [4] . Delay (picoseconds) Figure 3 .…”

“…used a moving mirror coupled cavity configuration to modelock a Ti : sapphire laser resulting in 40 ps pulses [3,4] . Wigley et al used this same hybrid configuration to modelock a Nd +3 -doped silica fibre laser, which resulted in 200 ps pulses [5] .…”

Simulation of Kerr Lens Modelocking Behavior in Sagittal Plane

“…The combination of the Kerr lens-aperture acts as a fast saturable absorber and a fast passive gain modulation is obtained. At the beginning of the Kerr modelocking developments, intensity fluctuations in laser startup were not sufficient to induces strong and steady Kerr lens modelocking [9][10] so acousto-optic modulation, additive pulse modelocking, impulsive starting or other methods [11][12][13][14][15][16][17][18][19][20][21] was required before the Kerr lens effect modelocking. Self-starting Kerr lens modelocking was obtained by use of highly nonlinear Kerr effect gain medium.…”