Regenerative titanium sapphire

These characteristics illustrate why two titanium sapphire lasers with an optional regenerative amplifier served as the basis of nearly all the investigations presented in this book. 

Fig. 2.14. Schematic setup of the regenerative mode-locked titanium sapphire laser (Spectra Physics Tsunami) with a simplified diagram of the servo electronics used to phase lock the cavity of the slave resonator to that of the master resonator AOM acusto-optic modulator OC output coupler GTI Gires-Tournois interferometer Ml to M4 high reflectors (taken from [223])...

Ultrashort Laser System. To analyze the time evolution of the neutral trimer s configuration a laser system consisting of a titanium sapphire oscillator (Spectra Physics Tsunami) which is pumped by a 12 W argon ion laser, and a Nd YLF-pumped regenerative amplifier system (Quantronix 4800 titanium sapphire RGA) is employed [175]. 

The amplifier system is composed of three logic subunits, a femtosecond pulse stretcher (Fig. 2.27), the titanium sapphire regenerative amplifier (Fig. 2.28) and a femtosecond pulse compressor (Fig. 2.29). To exploit the storage capability of titanium sapphire the system uses chirped-pulse amplification [264-266]. For this a seed pulse (80 fs, 5nJ) of the titanium sapphire oscillator is stretched to about 500 ps and then amplified. The stretched pulse can be safely amplified because the peak power has been significantly lowered, thereby avoiding any nonlinear effects that could result in damage to the... 

Fig. 2.30. Spectrum at A = 830 nm (a) and autocorrelation trace (b) of the regen-eratively amplified titanium sapphire laser. Assuming a sech pulse shape, a pulse width At — 94 fs (FWHM) is measrured. The spectrum reveals a bandwidth Ai> =...

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