Femtosecond multipass Ti:Sapphire amplifier
Model: MPA

    The MPA Ti: Sapphire multipass amplifier is designed to amplify single pulses from a CW mode-locked Ti: Sapphire laser. Typically an input pulse with energy of only a few nanojoules can be amplified to over 1mJ. This represents an overall amplification of greater than 10⁶. The amplification takes place as the optical pulse passes through a Ti: Sapphire laser rod, which has been optically excited by a laser pulse from the Q-switch pump laser. We use a Brewster cut Ti: Sapphire laser rod with the high-resistant mirror on the back side (HR 490-550 nm and HR 740-860 nm). It allows us to use the pump energy most effectively and select the length of active medium for maximal gain.

	Input Requirements	Model MPA
	CW pump average power, W	4 W (@ 514, 527 or 532 nm)
	Q-switch pump energy, mJ	10 mJ (@532 nm, <200 ns)
	Output Specifications
	Wavelength range, nm	780-820
	Pulse duration, fs	< 50
	Repetition rate	Single-shot - 1 kHz
	Energy (@ 1 kHz), mJ	> 500 µJ ( >1 mJ, >2.5 mJ models)
	Contrast ratio	1000:1
	Beam diameter, mm	5
	Energy stability (% p/p)	< 3%
	Dimensions, mm	1100x600x220