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Continuous-wave, single-frequency, solid-state blue source for the 425-489 nm spectral range.

G K Samanta1, M Ebrahim-Zadeh

  • 1ICFO-Institut de Cicncies Fotoniques, Mediterranean Technology, Park, Barcelona, Spain.

Optics Letters
|June 3, 2008
PubMed
Summary
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We developed a compact, all-solid-state blue laser source using an optical parametric oscillator. This new device provides tunable, single-frequency blue light with practical power, advancing laser technology.

Area of Science:

  • Nonlinear optics
  • Laser physics
  • Solid-state devices

Background:

  • Development of compact, tunable, single-frequency blue light sources is crucial for various scientific applications.
  • Existing blue laser technologies often face limitations in tunability, power, or complexity.

Purpose of the Study:

  • To report a novel, compact, all-solid-state source of continuous-wave (cw), single-frequency blue radiation.
  • To demonstrate extended tunability and practical output powers for this new blue light source.

Main Methods:

  • Utilized a green-pumped, cw, singly resonant optical parametric oscillator (OPO).
  • Employed MgO-doped stoichiometric lithium tantalate (MgO:sPPLT) as the nonlinear material.
  • Integrated internal second-harmonic generation (SHG) using a 5 mm BiB3O6 crystal.

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Main Results:

  • Achieved nearly 450 mW of cw, single-frequency blue power.
  • Demonstrated tunability over the range of 425-489 nm.
  • Obtained a narrow linewidth of 8.5 MHz and a Gaussian spatial beam profile.

Conclusions:

  • The developed MgO:sPPLT-based OPO offers a practical and versatile source for blue light generation.
  • The demonstrated performance, including tunability and power, is promising for applications requiring specific blue wavelengths.
  • Further extension of wavelength coverage is possible through the use of alternative gratings for the MgO:sPPLT crystal.