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Light-current characteristic of a 17 GHz MLL. Inset: optical spectrum at 110 mA.
(a) Pulse duration vs both reverse bias and current without feedback. Inset: autocorrelation trace (80 mA, −1.5 V). (b) Pulse duration vs both reverse bias and current under optical feedback . rf linewidth vs both reverse bias and current (c) without feedback and (d) under optical feedback .
rf linewidth as a function of the feedback level at a current of 110 mA and a voltage of −1.9 V Inset (a): rf Spectrum showing harmonic modes separated by 8 MHz. Inset (b): rf spectrum with showing a rf linewidth of .
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