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06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Supercontinuum pulse shaping in the few-cycle regime.
Franz Hagemann1, Oliver Gause, Ludger Wöste
1Institut f¨ur Experimentalphysik, Freie Universit¨at Berlin, Arnimallee 14, 14195 Berlin.
Optics Express
|March 14, 2013
Summary
Researchers demonstrate supercontinuum pulse generation with few-cycle substructures. Controlled filamentation and spatial light modulation achieve sub-5 fs pulses, enabling advanced pulse form synthesis.
Area of Science:
- * Ultrafast optics and nonlinear photonics.
- * Laser pulse shaping and characterization.
Background:
- * Generating ultrashort optical pulses with controlled waveforms is crucial for advanced scientific applications.
- * Existing methods often face limitations in temporal resolution and pulse energy.
Purpose of the Study:
- * To demonstrate the synthesis of arbitrary supercontinuum pulse forms with few-cycle substructures.
- * To achieve high-energy, few-cycle pulses through controlled spectral broadening and compression.
- * To establish a platform for further pulse form engineering via phase modulation.
Main Methods:
- * Two-stage sequential filamentation of 35 fs pulses in air at atmospheric pressure for spectral broadening.
- * Utilization of standard optics and a liquid crystal spatial light modulator (LC-SLM) for pulse compression.
- * Employing transient grating frequency-resolved optical gating (TG-FROG) for pulse characterization.
Main Results:
- * Achieved supercontinuum generation with homogeneous power density across visible to near-infrared wavelengths.
- * Demonstrated pulse compression to the sub-5 fs regime.
- * Obtained pulse energies up to 60 μJ and peak powers of 12 GW.
- * Characterized complex pulse forms with few-cycle substructures extending over hundreds of femtoseconds.
Conclusions:
- * A robust method for synthesizing arbitrary supercontinuum pulse forms with few-cycle substructures has been developed.
- * The technique enables precise control over pulse characteristics, paving the way for novel applications in ultrafast science.
- * The demonstrated pulse compression and characterization capabilities represent a significant advancement in ultrafast laser technology.
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