Research / 2020 / Article / Fig 1

Research Article

Spatial Wavefunction Characterization of Femtosecond Pulses at Single-Photon Level

Figure 1

The purposed common-path dispersion-matched shearing interferometer for spatial wavefunction characterization of single photons. (a) Schematic diagram of the experimental setup. The -wedge angle is highly exaggerated. Multiple neutral density filters are used to attenuate the laser beam. (b) Top view of the ray diagram showing how the right angle prisms bring the interferogram closer to the optical axis and cancel the spatial chirp induced by the CDSI. Two rays with distinct colors (red and blue) representing different wavelengths are shown. (c) Wavefront transformation after propagating through the BSC surfaces. Curly (straight) arrow indicates reflection (transmission).