1.64 µm pulsed source for a distributed opticalfibre Raman temperature sensor

The authors propose a novel source for distributed anti-Stokes Raman temperature sensing. A source generating 8 W, 10 ns pulses at 500 Hz, at λ = 1.64 µm is demonstrated. Operation at 1.64 µm enables the temperature dependent anti-Stokes signal at 1.53 µm to be generated in the low-loss window, facilitating a long range sensor.