Fig. 4: Comparison between experimental and simulated transmission.
From: On-chip, inverse-designed active wavelength division multiplexer at THz frequencies
a Spectral output collected individually from each port. The red stars correspond to the measured points in (b). The spectra are offset in the vertical direction for clarity without rescaling, showing the actual strength of the detected signal. b Normalized experimental spectral output for the three WDM ports together with the corresponding prediction from the CST 3D simulation. The measurements were done at 20 K, while the laser was operated in continuous-wave at 9.4 V and the WDM section was biased at 8.5 V.
