Two-dimensional Er:YSGG microlaser array pumped with a monolithic two-dimensional laser diode array

Area of Science:

• Materials Science
• Optics and Photonics
• Solid-State Physics

Background:

• Erbium-doped Yttrium Scandium Gallium Garnet (Er:YSGG) lasers are crucial for applications requiring specific mid-infrared wavelengths.
• Developing compact, high-power microlaser arrays is essential for miniaturization and enhanced performance in various optical systems.

Purpose of the Study:

• To demonstrate the fabrication and performance of one- and two-dimensional Er:YSGG microlaser arrays.
• To achieve high continuous wave (cw) power output at a 2.8-micrometer wavelength.
• To explore the potential of monolithic two-dimensional laser diode arrays with integrated deflectors for advanced laser configurations.

Main Methods:

• Fabrication of one-dimensional microlaser arrays using conventional edge-emitting laser diodes.
• Development of two-dimensional microlaser arrays based on surface-emitting monolithic two-dimensional laser diode arrays.
• Integration of 45-degree deflectors within the two-dimensional array architecture.
• Characterization of output wavelength and continuous wave (cw) power levels.

Main Results:

• Successful demonstration of both one- and two-dimensional Er:YSGG microlaser arrays.
• Achieved output wavelength of 2.8 micrometers.
• Reached continuous wave (cw) power levels up to 900 milliwatts (mW).
• Two-dimensional arrays utilized surface-emitting monolithic laser diodes with integrated 45-degree deflectors.

Conclusions:

• The study successfully presents high-power Er:YSGG microlaser arrays at 2.8 micrometers.
• The integration of surface-emitting laser diodes and deflectors offers a promising route for advanced two-dimensional laser systems.
• These microlaser arrays hold potential for applications in spectroscopy, medical treatments, and free-space communications.