dc.contributor.author | Alaydin, Behçet Özgür | |
dc.contributor.author | Keller, Ursula | |
dc.contributor.author | Barh, Ajanta | |
dc.contributor.author | Gaulke, Marco | |
dc.contributor.author | Golling, Matthias | |
dc.contributor.author | Heidrich, Jonas | |
dc.date.accessioned | 2022-05-13T11:14:50Z | |
dc.date.available | 2022-05-13T11:14:50Z | |
dc.date.issued | 01/03/2021 | tr |
dc.identifier.uri | https://opg.optica.org/oe/fulltext.cfm?uri=oe-29-5-6647&id=447795 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12418/13043 | |
dc.description.abstract | Semiconductor saturable absorber mirrors (SESAMs) are widely used for modelocking of various ultrafast lasers. The growing interest for SESAM-modelocked lasers in the short-wave infrared and mid-infrared regime requires precise characterization of SESAM parameters. Here, we present two SESAM characterization setups for a wavelength range of 1.9 to 3 µm to precisely measure both nonlinear reflectivity and time-resolved recovery dynamics. For the nonlinear reflectivity measurement, a high accuracy (<0.04%) over a wide fluence range (0.1–1500 µJ/cm2) is achieved. Time-resolved pump-probe measurements have a resolution of about 100 fs and a scan range of up to 680 ps. Using the two setups, we have fully characterized three different GaSb-SESAMs at an operation wavelength of 2.05 µm fabricated in the FIRST lab at ETH Zurich. The results show excellent performance suitable for modelocking diode-pumped solid-state and semiconductor disk lasers. We have measured saturation fluences of around 4 µJ/cm2, modulation depths varying from 1% to 2.4%, low non-saturable losses (∼ 0.2%) and sufficiently fast recovery times (< 32 ps). The predicted influence of Auger recombination in the GaSb material system is also investigated. | tr |
dc.language.iso | eng | tr |
dc.relation.isversionof | https://doi.org/10.1364/OE.418336 | tr |
dc.rights | info:eu-repo/semantics/openAccess | tr |
dc.title | Full optical SESAM characterization methods in the 1.9 to 3-µm wavelength regime | tr |
dc.type | article | tr |
dc.contributor.department | Fen Fakültesi | tr |
dc.contributor.authorID | 0000-0003-0935-4836 | tr |
dc.relation.publicationcategory | Rapor | tr |