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To investigate novel engine and fuel designs for greener aviation, instrumentation is required that can spatially and temporally resolve gas concentrations within aero-engine exhausts. This paper presents work towards a parallel, high-speed, distributed data acquisition (DAQ) system that employs in-situ demodulation of tunable diode laser absorption spectroscopy (TDLAS) signals. We briefly describe...
This research provides a new approach, laser interference lithography (LIL), to fabricate PSS and NPSS. Yet, there are two ways to pattern hexagonal 2D array on sapphire by LIL. First is multi-exposure LIL, and the second is multi-beam LIL. In conclusion, simulation results in this research may have verified that multi-beam LIL has significantly better throughput than multi-exposure LIL; the result...
We propose a novel method of combining time-resolved / spectroscopic and DSP techniques for fluorescence lifetime measurement. The lifetime of Bi/Er codoped fibre is determined with good accuracy over a range of emission wavelengths.
In this paper we report on preliminary work ultimately aimed at achieving a further reduction in thermal effects by combining the advantages of cryogenic cooling with a very low quantum defect fibre-laser-pumping of bulk solid-state lasers. Here we describe preliminary results for a cryogenically-cooled Ho:YAG laser in-band pumped by a high-power Tm-doped silica fibre laser.
In this paper, the fabrication of organic photo-diodes based on various J-aggregated cyanine dyes doped into PEDOT:PSS films by ink-jet is demonstrated and the properties especially the wavelength sensitivity of the photo-diodes have been investigated.
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