title: Noise reduction in a mode-locked semiconductor laser by coherent photon seeding.
abstract: We have used coherent photon seeding to reduce the noise in an actively mode-locked extended-cavity semiconductor laser. Feedback is provided by an auxiliary cavity terminated either by a wedge plate or by a phase-conjugate mirror. Both conventional and phase-conjugate feedback can reduce the low-frequency noise components (0-5 MHz) by as much as 36 dB, hence drastically reducing the pulse fluctuations. A noise reduction of as much as 18 dB is also observed in the 0.01-3.0-GHz frequency range. We obtained these results while preserving the pulse duration (26 ps) and improving the time-bandwidth product.
authors: P
authors: P
authors: Langlois
authors: D
authors: D
authors: Gay
authors: N
authors: N
authors: McCarthy
authors: M
authors: M
authors: Piché