Single-Walled Carbon Nanotubes Oust Graphene and Semiconductor Saturable Absorbers in Q-switched Solid-State Lasers at 2 μm

Pavel Loiko; Pavel Loiko; Xavier Mateos; Xavier Mateos; Josep Maria Serres; Ruijun Lan; Ruijun Lan; Sun Young Choi; Fabian Rotermund; Yicheng Wang; Jiang Li; Yubai Pan; Magdalena Aguiló; Francesc Díaz; Uwe Griebner; Valentin Petrov

2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
(Optica Publishing Group, 2017),
paper CA_5_2

Single-Walled Carbon Nanotubes Oust Graphene and Semiconductor Saturable Absorbers in Q-switched Solid-State Lasers at 2 μm

Pavel Loiko, Xavier Mateos, Josep Maria Serres, Ruijun Lan, Sun Young Choi, Fabian Rotermund, Yicheng Wang, Jiang Li, Yubai Pan, Magdalena Aguiló, Francesc Díaz, Uwe Griebner, and Valentin Petrov

The European Conference on Lasers and Electro-Optics 2017

Munich Germany
25–29 June 2017
ISBN: 978-1-5090-6736-7

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Two Micron Lasers (CA_5)

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P. Loiko, X. Mateos, J. M. Serres, R. Lan, S. Y. Choi, F. Rotermund, Y. Wang, J. Li, Y. Pan, M. Aguiló, F. Díaz, U. Griebner, and V. Petrov, "Single-Walled Carbon Nanotubes Oust Graphene and Semiconductor Saturable Absorbers in Q-switched Solid-State Lasers at 2 μm," in 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference, (Optica Publishing Group, 2017), paper CA_5_2.

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Abstract

Lasers emitting around 2 μm (eye-safe spectral range) are of practical importance for remote sensing, spectroscopy and medicine. Such emission is typically achieved from Tm³⁺ (³F₄ → ³H₆ transition) and Ho³⁺ ions (⁵I₇ → ⁵I₈ transition). The search for appropriate saturable absorbers (SAs) for passive Q-switching (PQS) of ~2 μm lasers is still ongoing. While “slow” SAs, e.g. Cr²⁺:ZnS, are well-established, “fast” SAs for high-repetition-rate (MHz-range) PQS or mode-locking are still under investigation. The technology of semiconductor saturable absorbers (SESAs) at ~2 μm is far from being mature. In the present work, we studied the potential of carbon nanostructures (single-walled carbon nanotubes, SWCNTs, [1] and graphene) as possible alternatives to SESAs.

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