Solid state LEDs are used as light sources in a photoacoustic continuous wave experimental set-up. It is shown that their typical relatively high power and narrow emission spectrum in the VIS-near IR range, together with the low cost of such devices, yield performances comparable to those obtained with commercial low-power lasers. Since the modulation of light pulses is accomplished by simply feeding the LED with a square wave, a wide range of chopping frequencies is obtained. Test measurements are reported, showing the good results obtained.

Use of LEDs as light sources in photoacoustic CW spectroscopy / G. Rivera; C. Viappiani. - In: MEASUREMENT SCIENCE & TECHNOLOGY. - ISSN 0957-0233. - 1:11(1990), pp. 1257-1259. [10.1088/0957-0233/1/11/022]

Use of LEDs as light sources in photoacoustic CW spectroscopy

VIAPPIANI, Cristiano
1990

Abstract

Solid state LEDs are used as light sources in a photoacoustic continuous wave experimental set-up. It is shown that their typical relatively high power and narrow emission spectrum in the VIS-near IR range, together with the low cost of such devices, yield performances comparable to those obtained with commercial low-power lasers. Since the modulation of light pulses is accomplished by simply feeding the LED with a square wave, a wide range of chopping frequencies is obtained. Test measurements are reported, showing the good results obtained.
Use of LEDs as light sources in photoacoustic CW spectroscopy / G. Rivera; C. Viappiani. - In: MEASUREMENT SCIENCE & TECHNOLOGY. - ISSN 0957-0233. - 1:11(1990), pp. 1257-1259. [10.1088/0957-0233/1/11/022]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2511074
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