Intense pulsed light systems are currently in widespread use in clinical applications. Verification of spectral content and associated pulse waveforms is, however, not featured in product support and calibration. A measurement system was developed to determine the spectral output of such sources within a series of discrete wavelength intervals.
Such a system utilised a series of 11 broadband optical filters with centre wavelengths within the range 450–950 nm in circuit with silicon photodiodes as optical detectors. Signals were captured using a low cost 8-channel 16-bit universal serial bus data capture module interfaced to a laptop computer. This allowed the pulse profile of selected filter components to be separately captured and analysed.
Calibration of individual filter channels was undertaken using a Bentham DMC150 spectroradiometer and reference tungsten light source. Initial measurements undertaken of the intense pulsed light output of a Lumenis One system using the system are described.
Clarkson, D.M., Gill, D. and Odeke, M., 2008. A time resolved intense pulsed light spectral analysis system. Lasers in medical science, 23(1), pp.59-64.
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Categories: Photonics & Optoelectronics