modulated light source, the supply voltages as well as allow the correct choice of the
filter natural frequency.
8.2 Influence of DC Bias Current Variations of the Laser
Diode Upon the Generation Frequency
One of the goals of experimental investigations is the check of theoretical calculations fulfilled in Chap. 3 concerning the bias current influence upon OEO generation
frequency at using the laser diode in OEO. The bias currents in an experiment are
varied in the wide range from 0 to 80 mA and correspond to values from the
threshold and above the threshold levels of the laser diode emission. The task of
Fig. 8.7 Experimental functions of the phase difference Δφ(θ) and the signal amplitude U out at the
photodetector output in the far zone
474
8 Experimental Investigations and Practical Circuits of Optoelectronic. . .
filter natural frequency.
8.2 Influence of DC Bias Current Variations of the Laser
Diode Upon the Generation Frequency
One of the goals of experimental investigations is the check of theoretical calculations fulfilled in Chap. 3 concerning the bias current influence upon OEO generation
frequency at using the laser diode in OEO. The bias currents in an experiment are
varied in the wide range from 0 to 80 mA and correspond to values from the
threshold and above the threshold levels of the laser diode emission. The task of
Fig. 8.7 Experimental functions of the phase difference Δφ(θ) and the signal amplitude U out at the
photodetector output in the far zone
474
8 Experimental Investigations and Practical Circuits of Optoelectronic. . .