Hot-isostatic-pressed Cr:ZnSe ultrafast laser at 2.4 μm

Yuchen Wang, Fiona Fleming, Richard A. McCracken, Carl Liebig, Sean McDaniel, Gary Cook, Paolo Laporta, Ajoy K. Kar, Gianluca Galzerano

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Abstract

We report on a room temperature Kerr-lens mode-locked chromium-doped zinc selenide (Cr:ZnSe) laser emitting four optical-cycles pulses in the mid- infrared spectral region in which the laser polycrystal has been treated by hot isostatic pressing (HIP). The laser emits 34 fs pulses at 2.4 μm, with a repeti- tion rate of 171 MHz and average output power capabilities of up to 150 mW. This is the first mode-locking investigation conducted using the HIP treated material and to our knowledge, is the shortest pulse width demonstrated, to date, from polycrystalline Cr:ZnSe. The experimental comparison with respect to an untreated polycrystal indicates that HIP treatment is advan- tageous for mode-locking action of this active material.
Original languageEnglish
Article number108300
Number of pages6
JournalOptics and Laser Technology
Volume154
Early online date21 May 2022
DOIs
Publication statusE-pub ahead of print - 21 May 2022

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