Can I read Electroluminescent Lamp-based Phase Fluorometer and Oxygen Sensor on EtoBox?

Electroluminescent Lamp-based Phase Fluorometer and Oxygen Sensor by Klaus W. Berndt; Joseph R. Lakowicz is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Electroluminescent Lamp-based Phase Fluorometer and Oxygen Sensor about?

We have tested 454-nm violet-emitting solid state electroluminescent lamps (ELLs) as inexpensive intensity-modulated excitation light sources for phase fluorometric oxygen sensors. Compared with blue-emitting silicon carbide LEDs, planar surface ELLs can be produced in various shapes and in large sizes. Accordingly, the overall optical output power emitted by ELLs is much higher than that of blue LEDs. By arranging a large-size ELL close to a large-size fluorescent chemical sensor, we obtained a large number of fluorescence photons allowing for the use of a pin photodiode instead of a photomultiplier tube as the detector. For a sinusoidal driving voltage at a frequency f, the ELL output light is modulated at 2f and at harmonics of 2f. Because of this nonlinear modulation characteristic, we used a square wave driving signal, resulting in a pulsed light output at a repetition rate twice the square wave frequency. The shortest light pulses obtained had a FWHM close to about 1 microsecond. This means that the violet ELLs used in our tests provide modulation frequencies at twice the square wave driving frequency and at all harmonics thereof up to about 1 MHz. This would allow the use of

Who reads Electroluminescent Lamp-based Phase Fluorometer and Oxygen Sensor?

Author

Klaus W. Berndt; Joseph R. Lakowicz

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0003-2697)

Published

1992

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)