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Related Experiment Videos

Narrowband bulk Bragg grating optical parametric oscillator.

Björn Jacobsson1, Mikael Tiihonen, Valdas Pasiskevicius

  • 1Department of Physics, Royal Institute of Technology, Albanova, 106 91 Stockholm, Sweden. bj@laserphysics.kth.se

Optics Letters
|September 30, 2005
PubMed
Summary
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A novel optical parametric oscillator (OPO) uses a Bragg grating for a narrower spectral bandwidth. This compact device achieves 35% efficiency and tunable output, improving laser technology.

Area of Science:

  • Nonlinear optics
  • Laser physics
  • Materials science

Background:

  • Optical parametric oscillators (OPOs) are crucial for generating tunable laser light.
  • Conventional OPOs often suffer from broad spectral bandwidths, limiting applications.
  • Improving spectral purity and efficiency in OPOs is an ongoing research goal.

Purpose of the Study:

  • To demonstrate a novel narrowband, pulsed optical parametric oscillator (OPO).
  • To integrate a bulk glass Bragg grating as an output coupler in an OPO.
  • To evaluate the spectral characteristics, efficiency, and tunability of the developed OPO.

Main Methods:

  • Utilizing periodically poled KTiOPO4 as the nonlinear medium.
  • Pumping the OPO with a pulsed, frequency-doubled Nd:YAG laser at 532 nm.

Related Experiment Videos

  • Employing a folded cavity design with a bulk glass Bragg grating output coupler.

    • Main Results:

    • Achieved a signal wavelength of 975 nm with a total efficiency of 35%.
    • Demonstrated a significantly reduced spectral bandwidth of 0.16 nm (50 GHz), a 20-fold improvement over conventional mirrors.
    • Obtained tunable radiation over a 60 nm range with maintained spectral bandwidth.

    Conclusions:

    • The Bragg grating OPO offers a compact and efficient solution for narrowband, tunable light generation.
    • This technology represents a significant advancement over conventional OPO designs.
    • The device's performance indicates potential for various spectroscopic and photonic applications.