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In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
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Suspended AlGaAs waveguides for tunable difference frequency generation in mid-infrared.
J B Khurgin1, M W Pruessner, T H Stievater
1Johns Hopkins University, Baltimore, MD 21218, USA. jakek@jhu.edu
Optics Letters
|December 17, 2008
Summary
A novel birefringent phase-matching scheme for difference-frequency generation was proposed. This method offers tunable performance in slotted waveguides, predicting high efficiency for optical applications.
Area of Science:
- Nonlinear optics
- Integrated photonics
- Waveguide technology
Background:
- Difference-frequency generation (DFG) is crucial for creating tunable light sources.
- Existing waveguide technologies face limitations in tunability and efficiency.
- Slotted waveguides offer unique confinement properties for nonlinear interactions.
Purpose of the Study:
- To propose and theoretically analyze a new birefringent phase-matching scheme for DFG.
- To investigate the tunability and efficiency of a slotted air-clad waveguide with a tunable gap.
- To demonstrate the potential of this scheme for advanced optical signal generation.
Main Methods:
- Theoretical analysis of a birefringent phase-matching scheme.
- Modeling of a slotted air-clad waveguide with a variable gap.
- Calculation of phase-matching conditions and conversion efficiency.
Main Results:
- A predicted tunability of 300 cm(-1) was achieved.
- An predicted efficiency of 400 W(-1) cm(-2) was demonstrated.
- The proposed scheme shows significant potential for efficient DFG.
Conclusions:
- The proposed birefringent phase-matching scheme is effective for DFG in slotted waveguides.
- Tunable gap in slotted waveguides enables significant control over phase matching.
- This approach offers a promising route to high-performance, tunable optical sources.
