Applied Physics B

, Volume 87, Issue 1, pp 21-27

First online:

Pearl-chain waveguides written at megahertz repetition rate

  • R. GrafAffiliated withMax Planck Institute of Quantum Optics
  • , A. FernandezAffiliated withMax Planck Institute of Quantum Optics
  • , M. DubovAffiliated withPhotonics Research Group, Aston University
  • , H.J. BruecknerAffiliated withUniversity of Applied Sciences, Fachhochschule Oldenburg/Ostfriesland/Wilhelmshaven
  • , B.N. ChichkovAffiliated withLaser Zentrum Hannover e.V.
  • , A. ApolonskiAffiliated withLudwig-Maximilians-Universität MünchenInstitute of Automation and Electrometry, SB RAS Email author 

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Waveguides in the form of connected pearls, written with sub-30 fs pulses centered at 800 nm at a repetition rate of 10 MHz, show high changes of the refractive index and, as a consequence, simple in-coupling. The value of the refractive index modification of these waveguides is as high as 10-2, optical losses are 6 dB/cm (at 1.55 μm) and the mode field diameter is 8 μm at 670 nm.