Improvement of vacuum squeezing resonant on the rubidium D1 line at 795 nm

Abstract

We report on efficient generation of second harmonic laser and single-mode vacuum squeezed light of 795 nm with periodically poled KTiOPO4 (PPKTP) crystals. We achieved 111 mW of ultra-violet (UV) light at 397.5 nm from 191 mW of fundamental light with a PPKTP crystal in a doubling cavity, corresponding to a conversion efficiency of 58.1%. Using the UV light to pump an optical parametric oscillator with a PPKTP crystal, we realized -5.6 dB of a maximum squeezing. We analyzed the pump power dependence of the squeezing level and concluded that the UV light induced losses limit the improvement of the squeezing level. The generated squeezed light has huge potential application in quantum memory and ultra-precise measurement.

References in corpus (7)

• Quantum memory for squeezed light
• Observation of -9 dB quadrature squeezing with improvement of phase stability in homodyne measurement
• Squeezed-Light Optical Magnetometry
• Ultrasensitive measurement of MEMS cantilever displacement sensitivity below the shot noise limit
• Rubidium resonant squeezed light from a diode-pumped optical-parametric oscillator
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Cited by in corpus (10)

• Generation of ${}^{87}$Rb-resonant bright two-mode squeezed light with four-wave mixing
• Quantum-enhanced rubidium atomic magnetometer based on Faraday rotation via 795-nm Stokes operator squeezed light
• Multi-step two-copy distillation of squeezed states via two photon subtraction
• Polarization squeezing at the audio frequency band for the Rubidium D1 line
• Quantum-enhanced magnetometry at optimal number density
• Enhancement of spin noise spectroscopy of rubidium atomic ensemble by using of the polarization squeezed light
• Atomic Resonant Single-Mode Squeezed Light from Four-Wave Mixing through Feedforward
• Generation of polarization squeezed light with an optical parametric amplifier at 795 nm
• Laser Intensity Noise Suppression for Preparing Audio-Frequency 795 nm Squeezed Vacuum State of Light at Rubidium D1 Line
• Squeezed-light enhancement and backaction evasion in a high sensitivity optically pumped magnetometer