Monolayer graphene coated Yb:YAG channel waveguides for <i>Q</i>-switched laser operation

作     者：Kim, Mi Hye Calmano, Thomas Choi, Sun Young Lee, Byung Jic Baek, In Hyung Ahn, Kwang Jun Yeom, Dong-Il Kraenkel, Christian Rotermund, Fabian 

作者机构：Ajou Univ Dept Energy Syst Res Suwon 16499 South Korea Ajou Univ Dept Phys Suwon 16499 South Korea Univ Hamburg Inst Laser Phys D-22761 Hamburg Germany Univ Hamburg Hamburg Ctr Ultrafast Imaging D-22761 Hamburg Germany 

出 版 物：《OPTICAL MATERIALS EXPRESS》 (光学材料快讯)

年 卷 期：2016年第6卷第8期

页      面：2468-2474页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：National Research Foundation of Korea (NRF) [2016R1A2A1A05005381, 2014R1A2A1A11049467, WCI 2011-001] Center for Advanced Meta-Materials (CAMM) - Korea Government (MSIP) as Global Frontier Project [CAMM 2014M3A6B3063709] Deutsche Forschungsgemeinschaft [FKZ CA 1380/1-1] Excellence Cluster 'The Hamburg Centre for Ultrafast Imaging - Structure, Dynamics and Control of Matter at the Atomic Scale' 

主　　题：Lasers Q-switched Lasers ytterbium Waveguides channeled 

摘      要：We studied operation characteristics of an Yb:YAG channel waveguide laser, Q-switched by employing monolayer graphene. Uniform monolayer graphene grown by thermal chemical vapor deposition is transferred directly onto one end facet of the channel waveguide which simultaneously serves as an output coupling mirror (OC), making a monolithic Q-switched waveguide laser possible. In this cavity configuration, the Q-switched laser delivers a maximum average output power of 85 mW, corresponding to a pulse energy of 64 nJ at 1.33-MHz repetition rate. The laser performance of this device is compared with another cavity configuration, in which the monolayer graphene is coated onto separate OCs. In this case a shorter pulse duration of 79 ns is achieved, but the laser operation performance is worse with respect to efficiency and output power. The proposed monolithic approach demonstrates the potential for developing more compact Q-switched laser devices. (C) 2016 Optical Society of America