  We experimentally demonstrate temporal reshaping of optical waveforms in the
telecom wavelength band using the principle of quantum frequency conversion.
The reshaped optical pulses do not undergo any wavelength translation. The
interaction takes place in a nonlinear $\chi^{(2)}$ waveguide using an
appropriately designed pump pulse programmed via an optical waveform generator.
We show reshaping of a single-peak pulse into a double-peak pulse and vice
versa. We also show that exponentially decaying pulses can be reshaped into
near Gaussian shape, and vice versa, which is a useful functionality for
quantum communications.
