Compact spectral pulse shaping using hybrid planar lightwave circuit and free-space optics with MEMS piston micromirrors and spectrogram feedback control

We combine a PLC and free-space optics for a compact Fourier-plane pulse shaper with low polarization dependencies. A micromirror array with piston motion provides phase modulation. The shaped electric field is extracted from a recorded spectrogram of the synthesized waveform.