Fig. 2: Pulse extinction ratio in the QD mode-locked laser | Light: Science & Applications

Fig. 2: Pulse extinction ratio in the QD mode-locked laser

From: Broadband quantum-dot frequency-modulated comb laser

Fig. 2

The formation of an AM comb requires that the gain recovery is slower than the SA recovery. The QD laser should operate with a low gain current and a high SA reverse bias to generate an AM comb. An increase in the gain current leads to the formation of an FM comb owing to the four-wave mixing

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