Laser vibrometer-rangefinder based on self-sweeping fiber laser

Author:

Volikova A. M.1,Lobach I. A.1,Kablukov S. I.1ORCID

Affiliation:

1. Institute of Automation and Electrometry, Siberian Branch of the Russian Academy of Sciences

Abstract

A vibrometer-rangefinder based on principles of coherent optical frequency-domain reflectometry (C-OFDR) is experimentally demonstrated. A self-sweeping ytterbium-doped fiber laser, which does not require any spectrally selective elements and drivers for wavelength tuning, with a sweeping range of 1056-1074 nm is used as a tunable source of probe radiation for the C-OFDR measurements. We demonstrate the possibility of measuring target vibrations in the frequency range from 2 Hz to 5 kHz with an amplitude of down to ∼5 nm at a distance of up to ∼13 m. The maximum measurable vibration frequency is limited by the instability of the self-sweeping laser parameters in the time domain and is estimated as ∼7.5 kHz.

Funder

Russian Science Foundation

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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