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Efficient optical parametric amplification in the thin film lithium niobate waveguides
Yuanqiang Peng1, Shunxing Yang1, RuiHuan Wu2
1China Telecom Research Institute, Guangzhou, 510630, People's Republic of China.
Scientific Reports
|January 22, 2025
Summary
Thin-film lithium niobate (TFLN) waveguides achieve efficient ultra-broadband optical parametric amplification (OPA) with a peak gain of 71.5 dB over 160 nm. This demonstrates TFLN
Area of Science:
- Integrated photonics
- Nonlinear optics
- Materials science
Background:
- Thin-film lithium niobate (TFLN) is a leading platform for integrated photonics.
- Optical parametric amplification (OPA) is crucial for various photonic applications.
- Systematic comparisons of TFLN and bulk lithium niobate (LN) for OPA gain are limited.
Purpose of the Study:
- To optimize TFLN waveguides for high-efficiency and ultra-broadband OPA.
- To comparatively evaluate the OPA performance of optimized TFLN waveguides.
- To investigate key OPA characteristics in TFLN waveguides.
Main Methods:
- Dispersion engineering of two TFLN waveguides.
- Experimental investigation of OPA in optimized TFLN waveguides.
- Analysis of gain, bandwidth, and power/length gain coefficients.
Main Results:
- Achieved peak gain of 71.5 dB for OPA in TFLN waveguides.
- Demonstrated ultra-broadband gain over a wavelength range exceeding 160 nm.
- Characterized power gain coefficient (dB/cm) and length gain coefficient (dB/W).
Conclusions:
- Optimized TFLN waveguides enable efficient ultra-broadband OPA.
- TFLN platforms offer significant potential for advanced photonic applications.
- The performance highlights TFLN's advantages over bulk LN for OPA.
