Generation of supercontinuum bottle beam using an axicon

Area of Science:

• Optics and Photonics
• Laser Physics

Background:

• Supercontinuum generation is crucial for various optical applications.
• Bottle beams offer unique intensity profiles for specialized uses.

Purpose of the Study:

• To demonstrate the successful generation of a supercontinuum bottle beam.
• To investigate the spectral characteristics and physical parameters of the generated beam.

Main Methods:

• Supercontinuum generation using a microstructured fiber pumped by a femtosecond Ti:sapphire laser.
• Formation of the bottle beam by focusing the supercontinuum through an axicon.
• Characterization of beam intensity distributions using a beam profiler and spectral filtering.

Main Results:

• Successful production of a supercontinuum bottle beam.
• Observation of wavelength-dependent variations in bottle beam range and diameter due to optical dispersion.
• Experimental results align with theoretical predictions based on Fresnel-Kirchhoff's formula.

Conclusions:

• The axicon-based method effectively generates supercontinuum bottle beams.
• Dispersion plays a significant role in shaping the spectral characteristics of the bottle beam.
• The study validates theoretical models for predicting bottle beam behavior.