Patrick O'Shea et al 2002 J. Opt. B: Quantum Semiclass. Opt. 4 44 doi:10.1088/1464-4266/4/1/307
Patrick O'Shea, Mark Kimmel and Rick Trebino
Show affiliationsRecently we introduced an extremely simple device for measuring ultrashort laser pulses, which utilizes a thick nonlinear-optical crystal, that replaces the usual thin nonlinear-optical medium and spectrometer simultaneously. It also replaces the usual beamsplitter and delay line with a single optic, a Fresnel biprism, which requires no alignment. Here we review the operation of the device and show that dithering the lateral position of the input beam in such a device increases the spectral range of the device with no loss in spectral resolution. Furthermore, we show that it separates the two constraints on crystal selection, allowing the measurement of a wider range of spectrally broader and/or more complicated pulses.
42.65.Re Ultrafast processes; optical pulse generation and pulse compression
42.79.Fm Reflectors, beam splitters, and deflectors
78.47.-p Spectroscopy of solid state dynamics
42.70.Mp Nonlinear optical crystals
42.60.Jf Beam characteristics: profile, intensity, and power; spatial pattern formation
Issue 1 (February 2002)
Received 26 October 2001
Published 14 January 2002
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