Tantalum pentoxide based on-chip femtosecond pulse compression

Area of Science:

• Nonlinear optics
• Waveguide optics
• Ultrafast photonics

Background:

• High-order soliton dynamics are crucial for nonlinear pulse manipulation.
• Tantalum pentoxide (Ta2O5) waveguides offer unique nonlinear properties.
• Pulse compression is essential for advancing ultrafast laser technology.

Purpose of the Study:

• To investigate pulse compression via high-order soliton dynamics in Ta2O5 waveguides.
• To experimentally and numerically analyze supercontinuum generation and temporal coherence.
• To determine the relationship between coherence time and pulse width for accurate duration measurement.

Main Methods:

• Experimental generation of supercontinuum in dispersion-engineered Ta2O5 waveguides.
• Numerical simulations of high-order soliton dynamics.
• Measurement of temporal coherence using interferometric techniques.
• Deduction of pulse duration via the coherence time-pulse width relation.

Main Results:

• Demonstrated pulse compression from 140 fs to 34.26 fs.
• Achieved compression at a coupled peak power of 1.31 kW.
• Validated the effectiveness of dispersion engineering in Ta2O5 waveguides for pulse shortening.

Conclusions:

• High-order soliton dynamics in Ta2O5 waveguides enable significant pulse compression.
• Dispersion engineering is key to achieving ultrashort pulse durations.
• Further optimization of waveguide design and dispersion can lead to enhanced compression performance.