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High power and high SFDR frequency conversion using sum frequency generation in KTP waveguides.
Optics Letters
|July 30, 2016
Summary
We analyzed intermodulation distortion in high-power optical frequency conversion using sum frequency generation (SFG) in KTP waveguides. Efficient conversion with a large dynamic range was achieved, minimizing unwanted frequency spurs.
Area of Science:
- Nonlinear optics
- Quantum optics
- Photonics
Background:
- Sum frequency generation (SFG) is crucial for optical frequency conversion.
- Periodically poled potassium titanyl phosphate (KTP) waveguides offer efficient nonlinear optical processes.
- Intermodulation distortion (IMD) can degrade signal quality in frequency conversion.
Purpose of the Study:
- To characterize intermodulation distortion in high-power SFG.
- To evaluate the efficiency and dynamic range of frequency conversion in KTP waveguides.
- To understand the generation mechanisms of unwanted frequency spurs.
Main Methods:
- Experimental characterization of IMD in SFG using modulated optical signals.
- Utilizing periodically poled potassium titanyl phosphate (KTP) waveguides.
- Computer simulations of the three-step cascaded three-wave mixing process.
Main Results:
- Demonstrated high-conversion efficiencies for modulated optical signals.
- Observed generation of unwanted two-tone spurs near the converted signal.
- Achieved a large spur-free dynamic range for the converted optical signal.
- Validated experimental findings with computer simulations.
Conclusions:
- SFG in KTP waveguides enables efficient high-power frequency conversion.
- Understanding IMD is critical for optimizing optical signal quality.
- The demonstrated spur-free dynamic range is significant for practical applications.
