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We have built a flexible source of picosecond pulsed light in both the near-infrared and visible spectral regions. A photonic crystal fiber (PCF) was pumped with a pulsed 1064 nm fiber laser to generate four-wave mixing (FWM) sidebands at 947 nm and 1213 nm. This process was seeded at the idler wavelength with a tunable diode laser to limit the spectral… (More)
Photonic crystal fibres (PCFs), silica nanowires and silica aerogel are all structures which deploy the high index contrast between silica glass and air to enhance photonic functionality. We shall discuss the latest results in nonlinear wavelength conversion and sensing using PCFs and aerogels.
Gain is observed for the first time in gas discharges in flexible hollow-core optical fibres. Helium-xenon DC discharges in 1m long fibres show gain on three laser transitions at 3.11, 3.37 and 3.51μm.