Measuring light speed with a modulated laser diode

Alberto Ronzani, Francesco MacCarrone, Alberto Di Lieto

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

The time of flight (TOF) of a light pulse travelling back and forth and optical path length measurements are used to estimate the velocity of light. The light pulse has a duration of 10 ns, and is obtained from a suitably modified CW commercial laser diode. The TOF is read with a digital oscilloscope connected to two fast sensors, detecting the signals at the switch-on of a laser diode and at the arrival of the light pulse reflected from a plane mirror placed at a known distance.

Original languageEnglish
Pages (from-to)957-965
Number of pages9
JournalEuropean Journal of Physics
Volume29
Issue number5
DOIs
Publication statusPublished - 1 Sep 2008
MoE publication typeA1 Journal article-refereed

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light speed
semiconductor lasers
pulses
oscilloscopes
optical paths
arrivals
switches
mirrors
sensors
estimates

Cite this

Ronzani, Alberto ; MacCarrone, Francesco ; Lieto, Alberto Di. / Measuring light speed with a modulated laser diode. In: European Journal of Physics. 2008 ; Vol. 29, No. 5. pp. 957-965.
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Measuring light speed with a modulated laser diode. / Ronzani, Alberto; MacCarrone, Francesco; Lieto, Alberto Di.

In: European Journal of Physics, Vol. 29, No. 5, 01.09.2008, p. 957-965.

Research output: Contribution to journalArticleScientificpeer-review

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