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arXiv · 1309.4779

Precise Measurement of Laser Power using an Optomechanical System

Kazuhiro Agatsuma·Daniel Friedrich·Stefan Ballmer·Giulia DeSalvo·Shihori Sakata·Erina Nishida·Seiji Kawamura
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Abstract

This paper shows a novel method to precisely measure the laser power using an optomechanical system. By measuring a mirror displacement caused by the reflection of an amplitude modulated laser beam, the number of photons in the incident continuous-wave laser can be precisely measured. We have demonstrated this principle by means of a prototype experiment uses a suspended 25 mg mirror as an mechanical oscillator coupled with the radiation pressure and a Michelson interferometer as the displacement sensor. A measurement of the laser power with an uncertainty of less than one percent (1 sigma) is achievable.

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Kazuhiro Agatsuma, Daniel Friedrich, Stefan Ballmer, Giulia DeSalvo, Shihori Sakata, Erina Nishida, Seiji Kawamura. 2014-01-26. Precise Measurement of Laser Power using an Optomechanical System. https://doi.org/10.1364/oe.22.002013

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