Fig. 1: Super-bunching enabled spectrally encoded optical channels.
From: Spectrally encoded parallel LiDAR driven by super-bunching light
a Experiment setup. A broadband super-bunching light was produced by pumping a photonic crystal fiber (PCF) with picosecond pulses centered at 1064 nm. An acousto-optic tunable filter (AOTF) is then used to select individual optical channels. Each channel was divided into reference and output paths via a 1:9 beam splitter (BS), spatially separated by a grating, and detected by avalanche photodetectors (APDs) for correlation analysis. b Spectral of the super-bunching light. The arrow indicates the wavelength of the pump. The inset demonstrated the second-order correlation results of channel 633 nm, yielding g2(0) = 5.02. c The auto-correlation function of channel 633 nm. Magnified views of the autocorrelation function’s sidelobes and central peak are shown in the left and right insets, respectively. The full width at half maximum (FWHM) of the autocorrelation peak is 0.6 ns. d The cross-correlation coefficients between each pair of the eight individual channels. The data are normalized to the global maximum across all measured data. e The cross-correlation functions between channels 532/532 nm and 532/542 nm. The extremum correlation peak of the 532/532 nm channels shows a delay time of 133.3 ns, which is greater than the pulse period (12.5 ns).
