Pearl-chain waveguides written at megahertz repetition rate
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- Graf, R., Fernandez, A., Dubov, M. et al. Appl. Phys. B (2007) 87: 21. doi:10.1007/s00340-006-2480-y
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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.