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Quasi-Phase-Matched Supercontinuum Generation in Photonic Waveguides
Daniel D Hickstein1, Grace C Kerber1,2, David R Carlson1
1Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
Physical Review Letters
|February 27, 2018
Summary
Quasi-phase-matching in integrated photonic waveguides precisely controls supercontinuum generation. This technique enhances light intensity in specific spectral regions, enabling tailored broadband light sources for diverse applications.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
Background:
- Supercontinuum generation (SCG) in integrated photonic waveguides produces broadband light.
- Spectrum generation is primarily governed by phase-matching conditions.
Purpose of the Study:
- To demonstrate quasi-phase-matching (QPM) using periodic waveguide structure modulations to control ultrafast pulse evolution during SCG.
- To experimentally achieve QPM-based SCG into TE20 and TE00 waveguide modes.
Main Methods:
- Periodic modulation of waveguide structures to implement QPM.
- Experimental demonstration of SCG into specific waveguide modes.
- Utilizing higher-order QPM (up to 16th order).
Main Results:
- Achieved QPM-SCG into TE20 and TE00 modes.
- Enhanced SCG intensity by up to 20 dB in specific spectral regions.
- Demonstrated intensity enhancement at multiple spectral locations using higher-order QPM.
Conclusions:
- QPM is an effective mechanism for controlling ultrafast pulse dynamics in SCG.
- QPM offers a new design parameter for engineering SCG spectra.
- This method allows for the development of customized broadband light sources for specific applications.
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