Fig. 7: Four-wave mixing in QD FM comb laser | Light: Science & Applications

Fig. 7: Four-wave mixing in QD FM comb laser

From: Broadband quantum-dot frequency-modulated comb laser

Fig. 7

a Experimental setup for the four-wave mixing (FWM) measurements. PC, polarization controller; VOA, variable optical attenuator; LD, laser diode; OSA, optical spectrum analyzer. FWM efficiency as a function of frequency detuning, with the laser operation conditions (Igain, VSA) = b (60 mA, –0.9 V); c (30 mA, –3.3 V); d (60 mA, –3.3 V). CDP, carrier density pulsation; CH, carrier heating; SHB, spectral hole burning

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