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Multimode low-pressure cw chemical laser performance including source flow effects.

H Mirels

    Applied Optics
    |March 25, 2010
    PubMed
    Summary
    This summary is machine-generated.

    This study analyzes continuous wave chemical laser performance under low pressure conditions. It reveals that source flow significantly impacts laser output power, but this effect can be accurately estimated using corrected numerical models.

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    Area of Science:

    • Physics
    • Laser Technology
    • Chemical Lasers

    Background:

    • Investigates low-pressure continuous wave (cw) chemical lasers operating in multiple longitudinal modes.
    • Considers the regime where longitudinal mode separation is much smaller than homogeneous and Doppler widths (Deltanu(c) << Deltanu(h) << Deltanu(d)).

    Purpose of the Study:

    • To analyze the performance of low-pressure multiple longitudinal mode cw chemical lasers.
    • To incorporate and evaluate the effects of source flow on laser performance.
    • To develop physically realistic, self-consistent solutions for practical laser flow regimes.

    Main Methods:

    • Assumes power on spectral line shape a priori for self-consistent solutions.
    • Includes effects of source flow (mean motion in the optical path direction).
    • Provides both numerical results and analytic limit solutions.

    Main Results:

    • Evaluates the decrement in net laser output power due to lack of saturation and source flow.
    • Demonstrates that source flow effects can be estimated from numerical codes with corrected line center gain.
    • Identifies a limit solution providing accurate, simple closed-form analytic expressions for laser performance.

    Conclusions:

    • Source flow significantly reduces net laser output power in low-pressure cw chemical lasers.
    • Numerical models can estimate source flow effects when gain is corrected.
    • A derived limit solution offers accurate analytic performance predictions for this laser regime.