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Related Concept Videos

Raman Spectroscopy: Overview01:20

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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.
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Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Tunable single-frequency cascaded Stokes order generation in monolithic diamond Raman resonators.

Cyril Bernerd, Georgios Stoikos, Katerina Chrysalidis

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    Summary
    This summary is machine-generated.

    This study showcases frequency-stabilized, tunable optical pulses generated using a diamond Fabry-Perot resonator. The cascaded Raman process enables precise control over widely spaced Fourier-limited pulses for advanced applications.

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    Area of Science:

    • Integrated photonics
    • Nonlinear optics
    • Quantum optics

    Background:

    • Cascaded Raman scattering is a key nonlinear optical process for frequency conversion.
    • Fabry-Perot resonators enhance light-matter interactions for precise spectral control.
    • Generating tunable, frequency-stabilized light sources is crucial for spectroscopy and quantum information.

    Purpose of the Study:

    • To demonstrate a novel method for producing widely spaced, frequency-stabilized optical pulses.
    • To precisely tune these pulses using temperature control of a diamond Fabry-Perot resonator.
    • To investigate the spectral characteristics and stability of the generated Stokes pulses.

    Main Methods:

    • Utilized a cascaded Raman process within a 7-mm integrated diamond Fabry-Perot resonator.
    • Employed a visible spectral range pump source at 532 nm.
    • Achieved pulse tuning by precisely adjusting the resonator's temperature.

    Main Results:

    • Simultaneously generated single axial Stokes modes with narrow linewidths (300 MHz and 180 MHz) at 573 nm and 623 nm, respectively.
    • Demonstrated over 20 GHz and 40 GHz tuning range for the first and second Stokes orders.
    • Achieved sub-50 MHz (RMS) center-frequency fluctuations for the second Stokes order pulses.

    Conclusions:

    • The integrated diamond resonator system effectively produces tunable, frequency-stabilized optical pulses via cascaded Raman scattering.
    • Temperature tuning offers precise control over the spectral properties of the generated light.
    • This technology holds promise for applications requiring stable, spectrally versatile light sources.