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Generation of 10-dB squeezed light from a broadband waveguide optical parametric amplifier with improved phase
Optics Express
|March 18, 2026
Summary
Researchers achieved 10.1-dB squeezed light using a broadband periodically poled lithium niobate (PPLN) waveguide optical parametric amplifier (OPA). This advancement in squeezed light generation is crucial for developing fault-tolerant quantum computation.
Area of Science:
- Quantum Optics
- Nonlinear Optics
- Materials Science
Background:
- Squeezed light generation is essential for quantum information processing.
- Previous work demonstrated 8.3-dB squeezing using a PPLN waveguide OPA.
- Reducing phase fluctuations and optical losses are key challenges.
Purpose of the Study:
- To improve squeezed light generation beyond 10 dB.
- To develop a novel phase detection technique for squeezed light.
- To advance the realization of fault-tolerant quantum computation.
Main Methods:
- Utilized a broadband periodically poled lithium niobate (PPLN) waveguide optical parametric amplifier (OPA).
- Implemented a new phase detection technique using a phase-detection OPA seeded by probe and pump light before the squeezer OPA.
- Minimized phase fluctuations and optical losses in the measurement system.
Main Results:
- Achieved 10.1 ± 0.2-dB squeezed light.
- Reduced phase fluctuation angle from 14 mrad to 9 mrad.
- Decreased total optical loss from 12% to 8%.
Conclusions:
- The developed broadband waveguide OPA surpasses 10 dB squeezing.
- The novel phase detection method effectively reduces noise without degrading squeezing.
- This work represents a significant step towards fault-tolerant quantum computation.
