dc.contributor.author | Alaydin, Behçet Özgür | |
dc.contributor.author | Barh, Ajanta | |
dc.contributor.author | Keller, Ursula | |
dc.contributor.author | Golling, Matthias | |
dc.contributor.author | Heidrich, Jonas | |
dc.contributor.author | Cristopher, Phillips | |
dc.contributor.author | Gaulke, Marco | |
dc.date.accessioned | 2022-05-13T10:25:40Z | |
dc.date.available | 2022-05-13T10:25:40Z | |
dc.date.issued | 09/02/2021 | tr |
dc.identifier.uri | https://hdl.handle.net/20.500.12418/13013 | |
dc.description.abstract | Femtosecond lasers with high peak power at wavelengths above 2 µm are of high interest for generating mid-infrared (mid-IR) broadband coherent light for spectroscopic applications. Cr2+-doped ZnS/ZnSe solid-state lasers are uniquely suited since they provide an ultra-broad bandwidth in combination with watt-level average power. To date, the semiconductor saturable absorber mirror (SESAM) mode-locked Cr:ZnS(e) lasers have been severely limited in power due to the lack of suitable 2.4-µm SESAMs. For the first time, we develop novel high-performance 2.4-µm type-I and type-II SESAMs, and thereby obtain state-of-the-art mode-locking performance. The type-I InGaSb/GaSb SESAM demonstrates a low non-saturable loss (0.8%) and an ultrafast recovery time (1.9 ps). By incorporating this SESAM in a 250-MHz Cr:ZnS laser cavity, we demonstrate fundamental mode-locking at 2.37 µm with 0.8 W average power and 79-fs pulse duration. This corresponds to a peak power of 39 kW, which is the highest so far for any saturable absorber mode-locked Cr:ZnS(e) oscillator. In the same laser cavity, we could also generate 120-fs pulses at a record high average power of 1 W. A comparable laser performance is achieved using type-II InAs/GaSb SESAM as well. These results pave the way towards a new class of high-power femtosecond SESAM mode-locked oscillators operating directly above 2-µm wavelength. | tr |
dc.language.iso | eng | tr |
dc.rights | info:eu-repo/semantics/openAccess | tr |
dc.title | Watt-level and sub-100-fs self-starting mode-locked 2.4-µm Cr:ZnS oscillator enabled by GaSb-SESAMs | tr |
dc.type | article | tr |
dc.contributor.department | Fen Fakültesi | tr |
dc.contributor.authorID | 0000-0003-0935-4836 | tr |
dc.relation.publicationcategory | Rapor | tr |