220-fs erbium-ytterbium:glass laser mode locked by a broadband low-loss silicon/germanium saturable absorber
Abstract
We demonstrate femtosecond performance of an ultra-broadband high-index-contrast saturable Bragg reflector consisting of a silicon/silicon-dioxide/germanium structure that is fully compatible with CMOS processing. This device offers a reflectivity bandwidth of over 700 nm and sub-picosecond recovery time of the saturable loss. It is used to achieve mode-locking of an Er-Yb:glass laser centered at 1540 nm, generating 220 fs pulses, with the broadest output spectrum to date.
- Publication:
-
Optics Letters
- Pub Date:
- February 2005
- DOI:
- 10.1364/OL.30.000329
- arXiv:
- arXiv:physics/0411232
- Bibcode:
- 2005OptL...30..329G
- Keywords:
-
- high-speed optical techniques;
- optoelectronic devices;
- lasers;
- solids;
- semiconductors;
- Physics - Optics