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Experimental setup for the generation and characterization of THz signal. All fiberised and free space components operate at room temperature. Optical fiber is represented with a solid line and electrical path is represented with dashed line.
THz spectrum recorded for the DUT biased at 88.5 mA and temperature controlled at . Measured data are represented by (○), the fitted Lorentzian distribution is represented by a solid line. In inset the optical spectrum recorded with a resolution of 0.02 nm, for the same bias and temperature conditions of the DUT.
Power of THz signal generated (●) and its central frequency (◇) as a function of bias current applied to the laser diode. The dashed lines are eye-guides.
Optical power unbalance (●) and THz linewidth (◇) as a function of bias current applied to the laser diode. The dashed lines are eye-guides.
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