Gas spectroscopy equipment for forensic field analysis

Purpose and goal

The main goal of this project was to develop a gas sensor based on Raman detection for field analysis at crime scenes. We were not able to arrive at the planned working prototype for gas detection, but the project has resulted in a refined manufacturing method for advanced optical fibres with longitudinal holes and very thin internal glass walls that give a long interaction length between light an analytes. This fibre type will be very useful for future sensor applications. We have also been able to show fibre-based detection of Raman signals from very small liquid samples.

Expected results and effects

Apart from an improved understanding of the analysis needs at crime scenes, the project has resulted in a refined manufacturing method of an advanced optical sensor fibre that is expected to play a key role in future sensor applications. Specifically, the demonstrated detection of Raman signals from very small liquid samples may serve as a starting point for further investigations.

Planned approach and implementation

The basic concept to include the whole chain from problem owner over product owner and system experts to developers is very beneficial. This kind of constellation enables a holistic perspective that is hard to obtain otherwise. This very project suffered from resource problems and a slight change of direction of operation for some of the partners, which made it difficult to reach the set goal and navigate according to the changed conditions, especially when the technical solutions proved to be more difficult than anticipated.