Q-switching of Yb-doped double-clad fiber laser using micro-optical waveguide on micro-actuating platform modulator for marking applications

Yunsong Jeong; Andreas Liem; Klaus Mörl; Sven Höfer; Youngbok Kim; Andreas Tünnermann; Kyunghwan Oh

doi:10.1117/12.659687

23 February 2006 Q-switching of Yb-doped double-clad fiber laser using micro-optical waveguide on micro-actuating platform modulator for marking applications

Yunsong Jeong, Andreas Liem, Klaus Mörl, Sven Höfer, Youngbok Kim, Andreas Tünnermann, Kyunghwan Oh

Author Affiliations +

Proceedings Volume 6102, Fiber Lasers III: Technology, Systems, and Applications; 61021K (2006) https://doi.org/10.1117/12.659687
Event: Lasers and Applications in Science and Engineering, 2006, San Jose, California, United States

Abstract

A Q-switched all-fiber laser application based on a novel micro-optical waveguide (MOW) on micro-actuating platform (MAP) light modulator is presented. A fused biconical taper (FBT) coupler acts as MOW, mounted on an electromechanical system, MAP, where an axial stress over the waist of FBT coupler is precisely controlled. The axial stress induced refractive index changes caused the coupling efficiency to result in modulation of optical power. The light modulator was implemented in a laser cavity as a Q-switching element. Q-switching of Yb³⁺-doped fiber laser was successfully achieved with the peak power of 192mW at 4.1W pump power and 699mW at 5.2W at the repetition rate of 18.6kHz. Further optimization of switching speed and modulation depth could improve the pulse extraction efficiency and the proposed structure can be readily applied in all-fiber Q-switching laser systems for marking applications.

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Yunsong Jeong, Andreas Liem, Klaus Mörl, Sven Höfer, Youngbok Kim, Andreas Tünnermann, and Kyunghwan Oh "Q-switching of Yb-doped double-clad fiber laser using micro-optical waveguide on micro-actuating platform modulator for marking applications", Proc. SPIE 6102, Fiber Lasers III: Technology, Systems, and Applications, 61021K (23 February 2006); https://doi.org/10.1117/12.659687

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