• Corpus ID: 249152140

43-GHz bandwidth real-time amplitude measurement of 5-dB squeezed light using modularized optical parametric amplifier with 5G technology

  title={43-GHz bandwidth real-time amplitude measurement of 5-dB squeezed light using modularized optical parametric amplifier with 5G technology},
  author={Asuka Inoue and Takahiro Kashiwazaki and Taichi Yamashima and Naoto Takanashi and Takushi Kazama and Koji Enbutsu and Kei Watanabe and Takeshi Umeki and Mamoru Endo and Akira Furusawa},
Continuous-variable optical quantum information processing (CVOQIP), where quantum information is encoded in a traveling wave of light Here, we developed a real-time amplitude measurement method using a modular optical parametric amplifier (OPA) and a broadband balanced photodiode that is commercially used for coherent wavelength-division multiplexing telecommunication of the fifth-generation mobile communication systems (5G). The OPA amplifies one quadrature-phase component of the quantum-level… 

Figures from this paper



Continuous-wave 6-dB-squeezed light with 2.5-THz-bandwidth from single-mode PPLN waveguide

Terahertz (THz)-bandwidth continuous-wave (CW) squeezed light is essential for integrating quantum processors with time-domain multiplexing (TDM) by using optical delay line interferometers. Here, we

Fabrication of low-loss quasi-single-mode PPLN waveguide and its application to a modularized broadband high-level squeezer

A continuous-wave (CW) broadband high-level optical quadrature squeezer is essential for high-speed large-scale fault-tolerant quantum computing on a time-domain-multiplexed continuous-variable

All-optical phase-sensitive detection for ultra-fast quantum computation.

The phase-locking and dispersion compensation of the broadband continuous-wave squeezed light are demonstrated, so that the phase of the squeezed light is maintained over 1 THz, which would help to realize all-optical quantum computation with over-THz clock frequency.

Integrated balanced homodyne photonic–electronic detector for beyond 20  GHz shot-noise-limited measurements

Optical homodyne detection is used in numerous quantum and classical applications that demand high levels of sensitivity. However, performance is typically limited due to the use of bulk optics and

Generation of Schrödinger cat states with Wigner negativity using a continuous-wave low-loss waveguide optical parametric amplifier.

Continuous-wave (CW) squeezed light is used in the generation of various optical quantum states, and thus is a fundamental resource of fault-tolerant universal quantum computation using optical

Over-30-dB gain and 1-dB noise figure phase-sensitive amplification using a pump-combiner-integrated fiber I/O PPLN module.

This work developed a PPLN-waveguide-based pump-combiner-integrated OPA module with fiber input and output ports, and demonstrated high-performance phase-sensitive amplification with a gain of over 30 dB and an NF of 1.0 dB.

Lifting the bandwidth limit of optical homodyne measurement with broadband parametric amplification

The authors exploit parametric amplification to demonstrate sub-shot-noise optical quadrature measurement across a bandwidth of 55 THz, which opens a wide window for parallel processing of quantum information.

Ultra-dense optical data transmission over standard fibre with a single chip source

By using a powerful class of micro-comb called soliton crystals, this work achieves ultra-high data transmission over 75 km of standard optical fibre using a single integrated chip source and demonstrates the capability of optical micro-combs to perform in demanding and practical optical communications networks.

Silicon photonics interfaced with integrated electronics for 9 GHz measurement of squeezed light

Photonic quantum technology can be enhanced by monolithic fabrication of both the underpinning quantum hardware and the corresponding electronics for classical readout and control. Here, by

Squeezed light at 1550 nm with a quantum noise reduction of 12.3 dB.

The realization of a half-monolithic nonlinear resonator based on periodically-poled potassium titanyl phosphate which enabled the direct detection of up to 12.3 dB of squeezing at 5 MHz suggests that a long-term stable 1550 nm squeezed light source can be realized with strong squeezing covering the entire detection band of a 3rd generation gravitational-wave detector such as the Einstein Telescope.