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06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Enhanced degree of temporal coherence through temporal and spatial phase coupling within a focused supercontinuum
Brendan J Chick1, James W M Chon, Min Gu
1Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, PO Box 218, Hawthorn, 3122 Victoria, Australia.
Optics Express
|December 10, 2009
Summary
Supercontinuum (SC) light diffraction causes unpredictable focal behavior due to phase coupling. This study shows temporal phase coupling dramatically alters spectra and coherence, controllable via photonic crystal fiber pulse evolution.
Area of Science:
- Optics and Photonics
- Nonlinear Optics
- Ultrafast Lasers
Background:
- Supercontinuum (SC) generation involves broadband light production.
- Diffraction by optical elements introduces spatial phase modulation.
- Predicting focal properties of SC sources is challenging due to complex interactions.
Purpose of the Study:
- Investigate the coupling between SC temporal phase and spatial phase from lens diffraction.
- Analyze the impact of this coupling on spectral and temporal coherence at the focal region.
- Explore methods to control focal properties using pulse evolution in photonic crystal fibers.
Main Methods:
- Numerical simulations of SC propagation and diffraction.
- Analysis of spectral and temporal coherence metrics.
- Investigating nonlinear and dispersive effects in photonic crystal fibers.
Main Results:
- Coupling between temporal and spatial phases significantly alters focal spectra and coherence.
- Maximum alterations occur at singularity points.
- Temporal coherence enhancement is controllable via pulse evolution, particularly soliton fission.
Conclusions:
- Lens diffraction critically impacts SC focal behavior through phase coupling.
- Photonic crystal fiber engineering offers control over focal coherence time.
- Understanding these interactions is vital for applications requiring precise SC focusing.
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