Quad-wavelength synchronously mode-locked bulk laser based on heterogeneous composite crystal with Fabry-Perot...

Area of Science:

• Optics and Photonics
• Laser Physics
• Materials Science

Background:

• Wave mixing (WM) is vital for applications like supercontinuum generation and frequency conversion.
• High-order WM efficiency is often hindered by complex phase-matching requirements.
• Compact, high-peak-power, synchronous, multicolor ultrafast laser sources are needed to improve WM efficiency.

Purpose of the Study:

• To develop a compact laser system for enhanced high-order wave mixing.
• To investigate the potential of Fabry-Perot structured (FPS) crystals in laser design.
• To achieve quad-wavelength synchronous mode-locking in a simplified laser cavity.

Main Methods:

• Designed and implemented a bulk laser system utilizing a Yb:SYB/Yb:CNGS Fabry-Perot structured (FPS) crystal.
• Achieved synchronous mode-locking operation within a single laser cavity.
• Leveraged the FPS crystal as both the gain medium and an integrated spectral filter.

Main Results:

• Successfully demonstrated quad-wavelength synchronous mode-locking at 1042.6, 1044.7, 1046.9, and 1049.1 nm.
• The FPS crystal enabled multi-wavelength operation without external spectral selection components.
• The simplified laser system integrates gain and spectral filtering functions.

Conclusions:

• The developed quad-wavelength synchronously mode-locked FPS crystal laser offers a simplified approach to generating multi-wavelength light.
• This technology presents new avenues for creating advanced light sources crucial for high-order wave mixing.
• FPS crystals show promise for integrated laser designs, enhancing efficiency and compactness.