Graphene mode-locked Cr:ZnS laser with 41 fs pulse duration

We report the ultrashort-pulse Cr:ZnS laser mode-locked by graphene-based saturable absorber mirror. Using the combination of bulk material and a chirped mirror, we demonstrate the shortest reported so far mid-IR pulses of only 5.1 optical cycles (41 fs) centered at 2.4 µm with 190 nm spectral bandw...

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Bibliographic Details
Published in:Optics express 2014-03, Vol.22 (5), p.5564-5571
Main Authors: Tolstik, Nikolai, Sorokin, Evgeni, Sorokina, Irina T
Format: Article
Language:English
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Summary:We report the ultrashort-pulse Cr:ZnS laser mode-locked by graphene-based saturable absorber mirror. Using the combination of bulk material and a chirped mirror, we demonstrate the shortest reported so far mid-IR pulses of only 5.1 optical cycles (41 fs) centered at 2.4 µm with 190 nm spectral bandwidth. The pulse spectrum almost completely fills the water-free atmospheric window. The output parameters reach 2.3 nJ pulse energy and 250 mW average output power at 108 MHz repetition rate.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.22.005564