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Regulation of Pulse01:20

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Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
09:38

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Published on: December 18, 2015

Pulse code modulation of CO(2) TEA laser pulse.

N T Nomiyama, R G Buser, R S Rohde

    Applied Optics
    |March 18, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Carbon dioxide (CO2) laser pulse tails were modulated using an electro-optic modulator. This advancement enables CO2 lasers for precision ranging and information transfer applications.

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    Area of Science:

    • Optics and Photonics
    • Laser Technology

    Background:

    • The tail of carbon dioxide (CO2) transversely excited atmospheric (TEA) laser pulses presents a challenge for applications requiring precise temporal control.
    • Existing modulation techniques may not be suitable for the specific characteristics of CO2 TEA laser pulse tails.

    Purpose of the Study:

    • To investigate the pulse code modulation of the CO2 TEA laser pulse tail.
    • To demonstrate the feasibility of using an electro-optic modulator for this purpose.
    • To explore the potential of modulated CO2 lasers for advanced applications.

    Main Methods:

    • Utilized a cadmium telluride (CdTe) crystal Pockels cell in a double-pass configuration.
    • Employed pulse code modulation techniques to manipulate the laser pulse tail.
    • Characterized the generated optical pulses in terms of width and repetition rate.

    Main Results:

    • Successfully achieved pulse code modulation of the CO2 TEA laser pulse tail.
    • Generated a train of optical pulses with a 100 nanosecond (nsec) width at a 5-megahertz (MHz) repetition rate.
    • Observed a high modulation depth of 92% with the Pockels cell modulator.

    Conclusions:

    • The electro-optic modulation of CO2 TEA laser pulse tails is feasible and effective.
    • The developed system offers multifunctional capabilities for precision ranging and information transfer.
    • The high modulation depth indicates efficient control over the laser pulse characteristics.