Timing characterization of 100 GHz passively mode-locked discrete mode laser diodes

Details Timing characterization of 100 GHz passively mode-locked discrete mode laser diodes Timing characterization of 100 GHz passively mode-locked discrete mode laser diodes

2011-12-21

arxiv.org/abs/1112.5024v1

Optics Express 19, 13990 (2011)

Physics

Optics

Scientific paper

We report on the characterization of the timing stability of passively mode-locked discrete mode diode laser sources. These are edge-emitting devices with a spatially varying refractive index profile for spectral filtering. Two devices with a mode-locking frequency of 100 GHz are characterized. The first device is designed to support a comb of six modes and generates near Fourier limited 1.9 ps pulses. The second supports four primary modes resulting in a sinusoidal modulation of the optical intensity. Using a cross-correlation technique, we measured a 20 fs pulse to pulse timing jitter for the first device, while, for the second device, a mode-beating (RF) linewidth of 1 MHz was measured using heterodyne mixing in a semiconductor optical amplifier. Comparison of these results with those obtained for an equivalent Fabry-Perot laser indicates that the spectral filtering mechanism employed does not adversely affect the timing properties of these passively mode-locked devices.

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