Figure 4
From: On-chip passive three-port circuit of all-optical ordered-route transmission
Experimental setup and measured regions.
(a) Schematic diagram of the experimental setup. The components of the apparatus are labelled as follows: TLS, tunable laser source; PC, polarization controller; HP-EDFA, high-power erbium-doped fiber amplifier; VOA, variable optical attenuator; ASE, amplified Spontaneous Emission; OC, optical coupler; OSA, optical spectrum analyzer. (b) Measured regions of the laser powers and ASE red-shifts. The laser powers and the red-shift ASE spectra are measured around 1547.72 nm (the red line) and around 1557.35 nm (the pink box), respectively.
