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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
Gyroscope: Precession01:24

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...
Gyroscope01:02

Gyroscope

A gyroscope is defined as a spinning disk in which the axis of rotation is free to assume any orientation. When spinning, the orientation of the spin axis is unaffected by the orientation of the body that encloses it. The body or vehicle enclosing the gyroscope can be moved from place to place, while the orientation of the spin axis remains the same. This makes gyroscopes very useful in navigation, especially where magnetic compasses cannot be used, such as in crewed and crewless spacecraft,...
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
Galvanometer01:24

Galvanometer

Common devices, including car instrument panels, battery chargers, and inexpensive electrical instruments, measure potential difference (voltage), current, or resistance using a d'Arsonval galvanometer. This electromechanical instrument is also known as a moving coil galvanometer.
The galvanometer consists of  two concave-shaped permanent magnets, providing a uniform radial magnetic field in the annular region. In the center, a pivoted coil of fine copper wire is placed in the uniform magnetic...

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Related Experiment Video

Updated: Jun 20, 2026

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
15:04

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

Published on: May 18, 2011

Synchronously pumped fiber Raman gyroscope.

M Nakazawa

    Optics Letters
    |September 3, 2009
    PubMed
    Summary
    This summary is machine-generated.

    A novel optical gyroscope utilizes stimulated Raman scattering in a single-mode fiber for enhanced inertial rotation detection. This fiber Raman laser approach promises highly sensitive measurements in a specific fiber region.

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    Area of Science:

    • Photonics and Optical Engineering
    • Inertial Sensing Technologies
    • Fiber Optic Devices

    Background:

    • Traditional gyroscopes face limitations in sensitivity and size.
    • Optical gyroscopes offer potential for high-precision rotation sensing.
    • Stimulated Raman scattering (SRS) is a nonlinear optical phenomenon with potential sensing applications.

    Purpose of the Study:

    • To propose and theoretically analyze a new optical gyroscope design.
    • To investigate the feasibility of using stimulated Raman scattering for inertial rotation detection.
    • To explore the potential for high-sensitivity measurements using fiber-based Raman lasers.

    Main Methods:

    • Theoretical modeling of an optical gyroscope based on stimulated Raman scattering.
    • Analysis of a synchronously pumped fiber Raman laser.
    • Investigation of operation within the zero-chromatic-dispersion region of a single-mode fiber.

    Main Results:

    • A theoretical framework demonstrating the principle of the proposed optical gyroscope.
    • Identification of conditions for achieving highly sensitive detection of inertial rotation.
    • The synchronously pumped fiber Raman laser operating in the zero-dispersion region is key.

    Conclusions:

    • The proposed optical gyroscope design shows promise for highly sensitive inertial rotation sensing.
    • Fiber-based stimulated Raman scattering offers a viable pathway for advanced gyroscope technology.
    • Further experimental validation is warranted to realize the potential of this approach.