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    Stable laser patterns formed in a high-finesse Fabry-Perot cavity with carbon dioxide (CO2) and oxygen (O2) gases. These patterns followed a power-law scaling with gas pressure.

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    Area of Science:

    • Physics
    • Optics
    • Laser Physics

    Background:

    • Fabry-Perot cavities are fundamental optical resonators.
    • Nonlinear phenomena in optical systems are crucial for understanding light-matter interactions.
    • Gaseous media can exhibit complex behavior within optical cavities.

    Purpose of the Study:

    • To investigate the formation and characteristics of spatial laser patterns in a high-finesse Fabry-Perot cavity.
    • To explore the influence of gas pressure on laser pattern dynamics.
    • To identify any scaling laws governing the observed patterns.

    Main Methods:

    • Utilized a high-finesse Fabry-Perot optical cavity.
    • Introduced carbon dioxide (CO2) and oxygen (O2) gases into the cavity at pressures up to 2 atm.
    • Observed and analyzed the resulting spatial laser patterns.

    Main Results:

    • Observed stable spatial laser patterns within the cavity for both CO2 and O2.
    • Identified a consistent sequence of patterns for both gases.
    • Found that the pattern formation obeys a scaling law of the form P ~ beta * p^2, where P is cavity power and p is gas pressure.

    Conclusions:

    • The study demonstrates predictable spatial laser pattern formation in gaseous media within an optical cavity.
    • The observed scaling law provides a quantitative description of pattern behavior related to gas pressure.
    • This research contributes to understanding nonlinear optical phenomena in gas-filled resonators.