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Efficient generation of highly squeezed light with periodically poled MgO:LiNbO3
Genta Masada1, Tsuyoshi Suzudo, Yasuhiro Satoh
11Department of Applied Physics, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. g.masada@lab.tamagawa.ac.jp
Optics Express
|July 1, 2010
Summary
We efficiently generated squeezed light and second harmonics using a periodically poled MgO:LiNbO(3) crystal. This advancement utilizes the crystal's large nonlinear optical coefficient for improved light generation.
Area of Science:
- Nonlinear optics
- Quantum optics
- Materials science
Background:
- Periodically poled MgO:LiNbO(3) (PPMgLN) crystals offer a large nonlinear optical coefficient (d33).
- Efficient generation of squeezed light and second harmonics is crucial for quantum information processing and laser technology.
Purpose of the Study:
- To demonstrate efficient continuous-wave squeezed light generation.
- To achieve efficient second harmonic generation using PPMgLN crystals.
Main Methods:
- Utilizing a subthreshold optical parametric oscillator with a PPMgLN crystal for squeezed light generation.
- Employing a PPMgLN crystal within an external cavity for second harmonic generation.
Main Results:
- Achieved a squeezing level of -7.60±0.15 dB at 860 nm.
- Generated 400 mW of second harmonics at 430 nm from 570 mW of fundamental waves.
- Obtained a 70% conversion efficiency for second harmonic generation.
Conclusions:
- PPMgLN crystals are highly effective for generating continuous-wave squeezed light and second harmonics.
- The demonstrated efficiencies pave the way for practical applications in quantum technologies and laser systems.
