scholarly journals Deterministic reshaping of single-photon spectra using cross-phase modulation

2016 ◽  
Vol 2 (3) ◽  
pp. e1501223 ◽  
Author(s):  
Nobuyuki Matsuda
Keyword(s):  
Information Processing ◽  
Wave Packet ◽  
Phase Modulation ◽  
Frequency Conversion ◽  
Quantum Information Processing ◽  
Single Photon ◽  
Low Noise ◽  
Single Photons ◽  
Cross Phase Modulation ◽  
All Optical

The frequency conversion of light has proved to be a crucial technology for communication, spectroscopy, imaging, and signal processing. In the quantum regime, it also offers great potential for realizing quantum networks incorporating disparate physical systems and quantum-enhanced information processing over a large computational space. The frequency conversion of quantum light, such as single photons, has been extensively investigated for the last two decades using all-optical frequency mixing, with the ultimate goal of realizing lossless and noiseless conversion. I demonstrate another route to this target using frequency conversion induced by cross-phase modulation in a dispersion-managed photonic crystal fiber. Owing to the deterministic and all-optical nature of the process, the lossless and low-noise spectral reshaping of a single-photon wave packet in the telecommunication band has been readily achieved with a modulation bandwidth as large as 0.4 THz. I further demonstrate that the scheme is applicable to manipulations of a nonclassical frequency correlation, wave packet interference, and entanglement between two photons. This approach presents a new coherent frequency interface for photons for quantum information processing.

scholarly journals Optical Chirality and Single-Photon Isolation

2020 ◽  
Author(s):  
Lei Tang ◽  
Keyu Xia
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Single Photon ◽  
Kerr Nonlinearity ◽  
Single Photons ◽  
Optical Isolation ◽  
Optical Chirality ◽  
Magneto Optical Effect ◽  
Quantum Optical

Optical isolation is important for protecting a laser from damage due to the detrimental back reflection of light. It typically relies on breaking Lorentz reciprocity and normally is achieved via the Faraday magneto-optical effect, requiring a strong external magnetic field. Single-photon isolation, the quantum counterpart of optical isolation, is the key functional component in quantum information processing, but its realization is challenging. In this chapter, we present all-optical schemes for isolating the backscattering from single photons. In the first scheme, we show the single-photon isolation can be realized by using a chiral quantum optical system, in which a quantum emitter asymmetrically couples to nanowaveguide modes or whispering-gallery modes with high optical chirality. Secondly, we propose a chiral optical Kerr nonlinearity to bypass the so-called dynamical reciprocity in nonlinear optics and then achieve room-temperature photon isolation with low insertion loss. The concepts we present may pave the way for quantum information processing in an unconventional way.

scholarly journals All-optical reversible single-photon isolation at room temperature

2021 ◽  
Vol 7 (12) ◽  
pp. eabe8924
Author(s):  
Ming-Xin Dong ◽  
Ke-Yu Xia ◽  
Wei-Hang Zhang ◽  
Yi-Chen Yu ◽  
Ying-Hao Ye ◽  
...  
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Insertion Loss ◽  
High Speed ◽  
Room Temperature ◽  
Quantum Information Processing ◽  
Single Photon ◽  
Electromagnetically Induced Transparency ◽  
All Optical ◽  
On Chip

Nonreciprocal devices operating at the single-photon level are fundamental elements for quantum technologies. Because magneto-optical nonreciprocal devices are incompatible for magnetic-sensitive or on-chip quantum information processing, all-optical nonreciprocal isolation is highly desired, but its realization at the quantum level is yet to be accomplished at room temperature. Here, we propose and experimentally demonstrate two regimes, using electromagnetically induced transparency (EIT) or a Raman transition, for all-optical isolation with warm atoms. We achieve an isolation of 22.52 ± 0.10 dB and an insertion loss of about 1.95 dB for a genuine single photon, with bandwidth up to hundreds of megahertz. The Raman regime realized in the same experimental setup enables us to achieve high isolation and low insertion loss for coherent optical fields with reversed isolation direction. These realizations of single-photon isolation and coherent light isolation at room temperature are promising for simpler reconfiguration of high-speed classical and quantum information processing.

A low noise, high fidelity cross phase modulation in multi-level atomic medium

2021 ◽  
Author(s):  
Liangwei Wang ◽  
Jia Guan ◽  
Chengjie Zhu ◽  
Runbing Li ◽  
Jing Shi
Keyword(s):  
Phase Modulation ◽  
Low Noise ◽  
High Fidelity ◽  
Cross Phase Modulation ◽  
Atomic Medium ◽  
Multi Level

All-Optical AND Gate Using Probe and Pump Signals as the Multiple Binary Points in Cross Phase Modulation

2002 ◽  
Vol 41 (Part 2, No. 5B) ◽  
pp. L568-L570 ◽  
Author(s):  
Byung-Kwon Kang ◽  
Jae Hun Kim ◽  
Young Tae Byun ◽  
Seok Lee ◽  
Young Min Jhon ◽  
...  
Keyword(s):  
Phase Modulation ◽  
Cross Phase Modulation ◽  
All Optical

Low-power broadband all-optical switching via intermodal cross-phase modulation in integrated optical waveguides

2018 ◽  
Vol 43 (8) ◽  
pp. 1631 ◽  
Author(s):  
Niklas M. Lüpken ◽  
Tim Hellwig ◽  
Martin Schnack ◽  
Jörn P. Epping ◽  
Klaus-J. Boller ◽  
...  
Keyword(s):  
Low Power ◽  
Phase Modulation ◽  
Optical Waveguides ◽  
Optical Switching ◽  
Cross Phase Modulation ◽  
Integrated Optical ◽  
All Optical ◽  
All Optical Switching ◽  
Integrated Optical Waveguides
Sign in / Sign up

Export Citation Format

Share Document