Phase noise reduction of passively mode-locked quantum-well semiconductor lasers by dual-cavity optical self-feedback
- 1Institut für Angewandte Physik, Technische Universität Darmstadt
- 2Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik
Dominik [dot] Auth [at] physik [dot] tu-darmstadt [dot] de
Passively mode-locked semiconductor lasers emitting picosecond short optical pulses at multi-GHz repetition rates and at wavelengths of around 1070 nm are attractive sources for seeding ytterbium doped fiber amplifiers or future data telecom. We present a 3 mm long passively mode-locked quantum-well semiconductor laser emitting 8.6 ps short optical pulses at a repetition rate of 13.6 GHz. By subjecting the laser to dual-cavity optical self-feedback by both a short external passive cavity and a long external passive cavity, phase noise reduction and repetition rate control is studied experimentally. Such a dual-feedback scheme allows simultaneously for a strong repetition rate tuning range as well as a strong phase noise reduction. A maximum repetition rate tuning range exceeding 1 GHz as well as repetition rate multiplication up to 54.4 GHz, the fourth harmonic mode-locking order, is presented. A timing jitter improvement by a factor of 200 is demonstrated.
@inproceedings{auth2019p46,
author = {Auth, Dominik and Weber, Christoph and Klehr, Andreas and Knigge, Andrea and Breuer, Stefan},
title = {{Phase noise reduction of passively mode-locked quantum-well semiconductor lasers by dual-cavity optical self-feedback}},
booktitle = {DGaO-Proceedings 2019},
series = {DGaO-Proceedings},
eventtitle = {120. Jahrestagung der DGaO},
eventdate = {2019-06-12/2019-06-15},
venue = {Darmstadt},
publisher = {Deutsche Gesellschaft für angewandte Optik e.V.},
year = {2019},
pages = {P46},
url = {https://dgao-proceedings.de/paper/120-p46}
}