Measuring light speed with a modulated laser diode

Alberto Ronzani; Francesco MacCarrone; Alberto Di Lieto

doi:10.1088/0143-0807/29/5/009

Measuring light speed with a modulated laser diode

Alberto Ronzani^*
, Francesco MacCarrone
, Alberto Di Lieto

^*Corresponding author for this work

Not published at VTT

University of Pisa (UNIPI)

Research output: Contribution to journal › Article › Scientific › peer-review

9 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 language	English
Pages (from-to)	957-965
Number of pages	9
Journal	European Journal of Physics
Volume	29
Issue number	5
DOIs	https://doi.org/10.1088/0143-0807/29/5/009
Publication status	Published - 1 Sept 2008
MoE publication type	A1 Journal article-refereed

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10.1088/0143-0807/29/5/009

Cite this

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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.",

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Measuring light speed with a modulated laser diode

Abstract

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