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Programmable-trajectory ultrafast flying focus pulses.

M V Ambat, J L Shaw, J J Pigeon

|September 15, 2023

Summary

This summary is machine-generated.

Researchers developed a method for designing optical setups that create ultrashort flying focus laser pulses with controllable focal trajectories. This technique extends the focal range and structures radial group delay for advanced laser applications.

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Area of Science:

Optics and Photonics
Ultrafast Laser Technology
Applied Physics

Background:

"Flying focus" techniques enable laser pulses with focal points that move over extended distances, surpassing the conventional Rayleigh length.
Implementing these advanced laser techniques necessitates optical designs capable of both extending focal range and precisely controlling radial group delay.

Purpose of the Study:

To present a novel method for designing optical configurations that generate ultrashort flying focus laser pulses.
To enable programmable trajectories for the focal points of these ultrashort laser pulses.

Main Methods:

Utilized an axiparabola to achieve an extended focal range.
Employed a reflective echelon or a deformable mirror-spatial light modulator (SLM) pair to structure the radial group delay.
Demonstrated the design method through illustrative examples.

Main Results:

Successfully designed optical configurations capable of producing ultrashort flying focus pulses with programmable focal trajectories.
The axiparabola effectively extended the focal range.
The deformable mirror-SLM configuration allowed for rapid exploration and optimization of flying focus characteristics.

Conclusions:

The proposed design method provides a pathway for creating advanced optical systems for flying focus applications.
The demonstrated configurations offer precise control over focal point dynamics.
The flexibility of the deformable mirror-SLM approach makes it particularly suitable for experimental optimization and future research.