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Tunable phase-stabilized infrared optical parametric amplifier for high-order harmonic generation.

Chunmei Zhang1, Pengfei Wei, Yansui Huang

  • 1State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, ChineseAcademy of Sciences, Shanghai 201800, China.

Optics Letters
|September 17, 2009
PubMed
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We developed a novel tunable infrared optical parametric amplifier (OPA) with stabilized carrier-envelope phase (CEP). This device uses a hollow fiber for improved beam quality and demonstrates tunable output from 1.2 to 2.4 micrometers.

Area of Science:

  • Optics and Photonics
  • Ultrafast Lasers
  • Nonlinear Optics

Background:

  • Optical parametric amplifiers (OPAs) are crucial for generating tunable laser light.
  • Carrier-envelope phase (CEP) stabilization is essential for precision in nonlinear optical phenomena.
  • Improving output beam quality and mitigating spatial chirp are persistent challenges in OPA design.

Purpose of the Study:

  • To demonstrate a novel tunable infrared optical parametric amplifier (OPA) with passively stabilized carrier-envelope phase (CEP).
  • To enhance output beam quality and address spatial chirp issues using a hollow fiber.
  • To showcase the application of the phase-stabilized OPA in high-order harmonic generation.

Main Methods:

  • Utilized an 800 nm pump source to drive the optical parametric amplification process.

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  • Incorporated a hollow fiber within the OPA setup to improve beam quality and reduce spatial chirp.
  • Employed passive techniques for carrier-envelope phase (CEP) stabilization.

    • Main Results:

    • Achieved tunable output pulses in the infrared spectrum, ranging from 1.2 to 2.4 micrometers, with CEP stabilization.
    • Demonstrated a maximum output average energy of approximately (1.2 W/40 fs)/1 kHz, with a total pump energy of (6.8 W/40 fs)/1 kHz.
    • Successfully generated high-order harmonics using the tunable, phase-stabilized OPA output.

    Conclusions:

    • The developed OPA offers a novel solution for tunable, phase-stabilized infrared light generation.
    • The integration of a hollow fiber effectively enhances beam quality and overcomes spatial chirp.
    • The demonstrated high-order harmonic generation highlights the potential of this OPA for advanced spectroscopic and materials science applications.