Tailoring octave-spanning ultrashort laser pulses using multiple prisms

Area of Science:

• Optics and Photonics
• Ultrafast Laser Technology

Background:

• Generating ultrashort laser pulses (single-cycle or few-cycle) is crucial for various scientific applications.
• Conventional methods often rely on complex components like chirped mirrors for dispersion management.

Purpose of the Study:

• To demonstrate a novel, prism-based pulse shaper for generating precisely shaped laser pulses.
• To achieve significant negative group delay dispersion (GDD) for compensating spectral broadening effects.

Main Methods:

• Utilizing a novel pulse shaper design involving angular dispersion with prisms.
• Splitting the incident laser beam into multiple beams using a series of prisms.
• Independently controlling the amplitude and phase of the separated beams.

Main Results:

• The pulse shaper successfully produces laser pulses with desired temporal shapes.
• A significant amount of negative GDD is achieved over an octave spectrum near the visible range.
• The device enables the generation of single-cycle or few-cycle laser pulses.

Conclusions:

• The demonstrated pulse shaper offers independent amplitude and phase control for tailored pulse generation.
• This novel approach effectively compensates for positive GDD, simplifying ultrashort pulse generation.
• The technology obviates the need for chirped mirrors in producing few-cycle laser pulses.