Compression of picosecond light pulses of a hybridly mode-locked pulsed Nd : glass laser

Abstract

Intra-cavity self-phase modulated pulses of an active-passive mode-locked pulsed Nd:phosphate glass laser are compressed from approximately 5 ± 1 ps to approximately 0.7 ± 0.3 ps by a grating-pair arrangement.

Theoretical analysis of pulse shaping of self-phase modulated pulses in a grating pair compressor

“…Using our experimental parameters of /= 13 cm (Nd: glass rod length), R out = 0.3, v 0 = Xo l = 9490 cm-1 (A 0 = 1054nm), y « 4 x 10" 16 cm 2 W" 1 [30] and 7 0 « 10 10 Wcm~2, a bandwidth product of AvAt « 6 is calculated. For At = 5ps the spectral width is Av « 45 cm" 1 , a reasonable agreement with our experimental findings [22].…”

“…4) an optimum grating distance of d = 27 cm is estimated. In the experiments d = 25 cm was used [22].…”

“…In a recent experiment we compressed intracavity self-phase modulated pulses of an actively and passively mode-locked pulsed Nd: glass laser in an external grating pair compressor [22]. Around and slightly beyond the pulse train maximum the intracavity self-phase modulation broadened the pulses of 5 ± lps duration to a spectral width of 60 + 20 cm -1 .…”

Triplet-triplet absorption of eosin Y in methanol determined by nanosecond excimer laser excitation and picosecond light continuum probing

“…For the picosecond probe continuum generation an active (acousto-optic modulator IntraAction model ML-50Q) and passive (saturable absorber Kodak dye np. 9860 dissolved in 1,2-dichloroethane) mode-locked and Q-switched (Pockels cell Q-switch Gsanger model HVD1000) Nd:phosphate glass laser (wavelength 1.054 |im) [61 ] is applied in single shot operation mode. A single pulse is selected from the pulse train by a Kerr cell shutter [62] and increased in energy by passing through a Nd:phosphate glass amplifier.…”

Absorption and emission spectroscopic characterization of 10-phenyl-isoalloxazine derivatives

“…The fluorescence lifetime of a long-wavelength absorbing tail was determined by picosecond laser pulse excitation (Dt L % 6 ps) at k L = 527 nm using a mode-locked Nd-phosphate:glass laser system [39] and using the same detection system as for the main component fluorescence lifetime measurement.…”