Simultaneous recording of digital holograms using a two-wavelength femtosecond laser source

A novel scheme for a coherent multicolor femtosecond source, based on an adapted commercial Ti:sapphire amplifier system is presented. Its performance is demonstrated by simultaneously recording of two digital holograms using ultrashort pulses. The Ti:sapphire laser is modified to simultaneously generate two femtosecond pulses for 2-lambda contouring. For separating the two pulses, a specially designed half-wave retarder together with a polarizing beam splitter were employed in the Michelson-type interferometer.