Figure 2 shows the L-I properties of a laser diode with a threshold current, I of 10 mA. A direct modulation is performe

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Figure 2 Shows The L I Properties Of A Laser Diode With A Threshold Current I Of 10 Ma A Direct Modulation Is Performe 1 (38.17 KiB) Viewed 29 times

Figure 2 shows the L-I properties of a laser diode with a threshold current, I of 10 mA. A direct modulation is performed at 5 mA for the 'space' and 30 mA for the 'mark' of the modulating pulses. 10 8 4 2 (wgp) indino 2 7 B -8 10 10 20 30 40 50 60 70 80 90 Injection Current (mA) Rajah 2. Ciri L-I diod laser Figure 2. Laser diode L-I properties 100 110 a) Explain the purpose to perform this biasing current condition and describe the performance of the resulting signal modulation. b) From the graph of Figure 2. suggest the biasing current value to obtain the best direct modulation of the electrical pulses and explain why the value is chosen. c) A laser diode operating at 1.55 um has a linewidth 1.25 nm. Determine the value of the linewidth in frequency.