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Title: Graphene Q-switched Yb:KYW planar waveguide laser

A diode-pumped Yb:KYW planar waveguide laser, single-mode Q-switched by evanescent-field interaction with graphene, is demonstrated for the first time. Few-layer graphene grown by chemical vapor deposition is transferred onto the top of a guiding layer, which initiates stable Q-switched operation in a 2.4-cm-long waveguide laser operating near 1027 nm. Average output powers up to 34 mW and pulse durations as short as 349 ns are achieved. The measured output beam profile, clearly exhibiting a single mode, agrees well with the theoretically calculated mode intensity distribution inside the waveguide. As the pump power is increased, the repetition rate and pulse energy increase from 191 to 607 kHz and from 7.4 to 58.6 nJ, respectively, whereas the pulse duration decreases from 2.09 μs to 349 ns.
Authors:
; ; ; ;  [1] ; ;  [2] ; ;  [3] ;  [4]
  1. Department of Energy Systems Research and Department of Physics, Ajou University, 443-749 Suwon (Korea, Republic of)
  2. Integrated Optical Micro Systems Groups, MESA+ Institute of Nanotechnology, University of Twente, 7500 AE Enschede (Netherlands)
  3. Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin (Germany)
  4. Soft Innovative Materials Research Center, Korea Institute of Science and Technology, Jeonbuk 565-905 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22454418
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 1; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; BEAM PROFILES; CHEMICAL VAPOR DEPOSITION; GRAPHENE; INTERACTIONS; KHZ RANGE; LASERS; LAYERS; PULSES; WAVEGUIDES