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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

298
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...
298
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

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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...
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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Isolator-free 60 W diamond Raman laser at 607 nm.

A Sharp, H Jasbeer, R Pahlavani

    Optics Letters
    |September 13, 2024
    PubMed
    Summary
    This summary is machine-generated.

    We developed a diamond Raman laser emitting visible light at 607 nm. This laser achieved 60 W output power with 28% efficiency, but stability decreased at higher powers due to stimulated Brillouin scattering.

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    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Materials Science

    Background:

    • Diamond Raman lasers offer potential for visible light generation.
    • Efficient frequency conversion is crucial for various applications.
    • Managing back reflections and nonlinear effects is key for laser stability.

    Purpose of the Study:

    • To demonstrate an intra-cavity frequency doubled diamond Raman laser.
    • To achieve high output power in the visible spectrum.
    • To investigate the impact of cavity design and nonlinear effects on laser performance.

    Main Methods:

    • Utilized a z-fold cavity design for a diamond Raman laser.
    • Employed a 1045 nm fiber laser as the pump source.
    • Configured the cavity to prevent back reflections and avoid isolators.

    Main Results:

    • Achieved laser operation at 607 nm.
    • Generated a maximum output power of 60 W across two beams.
    • Obtained a maximum single-beam output power of 40 W.
    • Demonstrated an optical conversion efficiency of 28%.

    Conclusions:

    • The z-fold cavity design effectively managed back reflections.
    • Stimulated Brillouin scattering negatively impacted output power and frequency stability above 10 W.
    • Further optimization is needed to mitigate nonlinear effects for improved high-power operation.