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Graphene Mode-locked Cr:ZnS Laser with 41 fs Pulse Duration

Tolstik, Nikolai; Sorokin, Evgeni; Sorokina, Irina T
Journal article, Peer reviewed
Published version
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URI
http://hdl.handle.net/11250/2463519
Date
2014
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  • Institutt for fysikk [1807]
  • Publikasjoner fra CRIStin - NTNU [20842]
Original version
Optics Express. 2014, 22 (5), 5564-5571.   10.1364/OE.22.005564
Abstract
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.
Publisher
Optical Society of America
Journal
Optics Express

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