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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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Related Experiment Video

Updated: Aug 26, 2025

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Laser vibrometer-rangefinder based on self-sweeping fiber laser.

A M Volikova, I A Lobach, S I Kablukov

    Optics Express
    |October 13, 2022
    PubMed
    Summary

    A novel vibrometer-rangefinder using coherent optical frequency-domain reflectometry (C-OFDR) can measure small vibrations up to 5 kHz. This system achieves high precision for remote sensing applications.

    Area of Science:

    • Optics and Photonics
    • Laser Technology
    • Metrology

    Background:

    • Coherent optical frequency-domain reflectometry (C-OFDR) offers precise measurement capabilities.
    • Developing compact and versatile vibrometer-rangefinder systems is crucial for various applications.
    • Self-sweeping fiber lasers provide a tunable and driver-free light source for optical measurements.

    Purpose of the Study:

    • To experimentally demonstrate a vibrometer-rangefinder system based on C-OFDR principles.
    • To utilize a self-sweeping ytterbium-doped fiber laser for C-OFDR measurements.
    • To assess the system's capability in measuring target vibrations over a specific frequency and distance range.

    Main Methods:

    • Employed a self-sweeping ytterbium-doped fiber laser (1056-1074 nm) as the tunable probe radiation source.

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  • Implemented coherent optical frequency-domain reflectometry (C-OFDR) for vibration and distance measurements.
  • Conducted experiments to measure target vibrations with varying frequencies and amplitudes at different distances.

    • Main Results:

    • Successfully demonstrated a vibrometer-rangefinder system.
    • Achieved measurement of target vibrations from 2 Hz to 5 kHz with amplitudes as low as ~5 nm.
    • The system operated effectively at distances up to ~13 m.
    • The maximum measurable vibration frequency was limited to ~7.5 kHz due to laser parameter instability.

    Conclusions:

    • The demonstrated C-OFDR vibrometer-rangefinder system is capable of precise, remote vibration measurements.
    • The use of a self-sweeping fiber laser simplifies the system setup and operation.
    • Further improvements in laser stability could extend the maximum measurable vibration frequency.