Mode-locking of a femtosecond-laser-inscribed Yb:YAG channel waveguide laser using a carbon nanotube saturable absorber
| Autor: | Fabian Rotermund, Sun Young Choi, Christian Kränkel, Thomas Calmano |
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| Rok vydání: | 2017 |
| Předmět: |
Distributed feedback laser
Materials science business.industry Far-infrared laser Physics::Optics Saturable absorption 02 engineering and technology Laser pumping Laser 01 natural sciences Round-trip gain law.invention 010309 optics 020210 optoelectronics & photonics Optics law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Optoelectronics Physics::Atomic Physics Laser power scaling business Tunable laser |
| Zdroj: | 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). |
| DOI: | 10.1109/cleoe-eqec.2017.8086976 |
| Popis: | Compact pulsed laser sources are of interest for diverse application areas. Due to their broad gain bandwidth, high Stokes efficiency and low thermal load near the 1 μm spectral region, ytterbium doped laser materials are promising for such devices. Channel waveguides in such gain media provide compact laser systems and deliver efficient single-mode laser operation with low laser thresholds. One of the widely-used techniques for manufacturing channel waveguides in transparent materials including laser gain media is fs-laser inscription. Inscribing two parallel tracks inside a laser crystal with a distance of few 10 μm allows for highly efficient laser operation in few mm-long monolithic resonators [1]. Pulsed operation of fs-laser inscribed channel waveguide lasers has been demonstrated with saturable absorbers (SAs) including SESAMs and low-dimensional carbon nanostructures. Intrinsic fast response time, linear and nonlinear absorption in a broad spectral range and relatively simple fabrication processes make graphene and single-walled carbon nanotubes (SWCNTs) a cost effective approach for saturable absorbers for various laser types including channel waveguide lasers. Recently, Q-switched [2-4] and even mode-locked operation at 1.94 GHz repetition rate [5] have been demonstrated with fs-laser inscribed Yb3+-doped waveguides. However, mode locking of fs-laser inscribed waveguide lasers by employing carbon nanotubes is not yet reported. |
| Databáze: | OpenAIRE |
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