Stimulated Raman scattering in AsSe2-As2S5 chalcogenide microstructured optical fiber with all-solid core

Area of Science:

• Photonics and Optical Engineering
• Materials Science
• Nonlinear Optics

Background:

• Chalcogenide microstructured optical fibers (MOFs) offer unique nonlinear optical properties.
• Stimulated Raman Scattering (SRS) is a key nonlinear optical phenomenon with applications in wavelength conversion and optical sensing.
• Investigating SRS in novel fiber materials like AsSe2-As2S5 MOFs is crucial for advancing optical technologies.

Purpose of the Study:

• To demonstrate and investigate stimulated Raman scattering (SRS) in all-solid AsSe2-As2S5 chalcogenide microstructured optical fibers (MOFs).
• To determine the optimal fiber core diameter for maximizing the conversion efficiency of the first-order Raman Stokes wave.
• To analyze the influence of fiber core diameter and walk-off length on SRS efficiency.

Main Methods:

• Fabrication of AsSe2-As2S5 chalcogenide MOFs with varying core diameters.
• Experimental investigation of SRS by pumping the MOFs with picosecond pulses at 1958 nm.
• Numerical simulation of Raman effects to validate experimental findings.

Main Results:

• Maximum conversion efficiency of -15.0 dB from pump to first-order Raman Stokes wave achieved in a MOF with a 2.6 μm core diameter.
• Conversion efficiency decreases significantly when the core diameter deviates from 2.6 μm.
• Experimental data and numerical simulations show good agreement, highlighting the importance of walk-off length.

Conclusions:

• Demonstrated SRS for the first time in AsSe2-As2S5 MOFs.
• Identified 2.6 μm as the optimal core diameter for efficient SRS in this material system.
• The findings provide valuable insights for designing chalcogenide MOFs for nonlinear optical applications.