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Guided acoustic wave Brillouin scattering (GAWBS) in PCFs is altered by the air-silica structure of the inner cladding and does not depend on the cladding diameter as with standard fibers. This dependence is investigated.
A continuous-wave laser has been stabilized to an acetylene transition inside kagome photonic crystal fiber. Stability as measured with a carbon nanotube fiber laser frequency comb is better than 1times10-11 at 10 s.
We demonstrated non-degenerate sequential time-bin entanglement using periodically poled KTP waveguide at a repetition rate of 1 GHz. The wavelengths of signal and idler are 895 and 1310 nm. The two-photon-interference-fringe visibility is 79%.
Ytterbium-doped phosphosilicate fibers with phosphate-like characteristics, lifetime and doping-levels are demonstrated, offering significantly increased peak powers from shorter fiber amplifiers. Efficient fibers with up to 4700 dB/m peak absorption at 976 nm and low photo-darkening are demonstrated.
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