We present evidence of MMF noise and introduce an algorithm that predicts the amplitude of the noise as a function of parameters such as core diameter, fiber length, and spectral resolution.

We continue to develop laser sources for high-speed gas absorption spectroscopy. A recent source cycles through 14 wavelengths in the 1325-1666nm range every 33 microseconds for combined measurements of gas temperature, ...

A time-division multiplexed source that cycles through 19 wavelengths every 15 s will be described. Sensing results using this and similar sources will follow, including gas thermometry at 100kHz with a precision of 4K at 2000K.