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Spatiotemporal wavevector dynamics of transverse mode-locked beams
Optics Express
|April 12, 2025
Summary
Transverse mode-locked (TML) beams exhibit oscillating wavevectors due to phase-locking. This study experimentally verifies these dynamics, crucial for phase-sensitive applications.
Area of Science:
- Optics and Photonics
- Laser Physics
Background:
- Phase-locking of transverse higher-order resonator modes creates beams with oscillating spatial intensity.
- Understanding the spatiotemporal phase dynamics of these transverse mode-locked (TML) beams is essential for their characterization.
Purpose of the Study:
- To explore and describe the spatiotemporal phase dynamics of transverse mode-locked (TML) beams.
- To experimentally verify the predicted oscillating wavevectors in TML beams.
- To quantify the dependence of wavevector oscillation on beam size.
Main Methods:
- Analysis of phase terms within TML beams.
- Experimental verification using the mode-matching requirement of single-mode fibers.
- Quantification of wavevector oscillation by varying beam size.
Main Results:
- The analysis revealed oscillating wavevectors in TML beams.
- Experimental verification confirmed the presence of oscillating wavevectors.
- The oscillation of wavevectors was found to be dependent on the beam size.
Conclusions:
- The spatiotemporal phase dynamics of TML beams are characterized by oscillating wavevectors.
- Experimental validation confirms these findings, linking them to fiber mode-matching.
- These results are critical for the future application of TML beams in phase-sensitive processes.
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