# Coherent ultrafast measurement of time-bin encoded photons.

@article{Donohue2013CoherentUM, title={Coherent ultrafast measurement of time-bin encoded photons.}, author={John M. Donohue and Megan Agnew and Jonathan Lavoie and Kevin J. Resch}, journal={Physical review letters}, year={2013}, volume={111 15}, pages={ 153602 } }

Time-bin encoding is a robust form of optical quantum information, especially for transmission in optical fibers. To readout the information, the separation of the time bins must be larger than the detector time resolution, typically on the order of nanoseconds for photon counters. In the present work, we demonstrate a technique using a nonlinear interaction between chirped entangled time-bin photons and shaped laser pulses to perform projective measurements on arbitrary time-bin states with…

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## References

SHOWING 1-10 OF 36 REFERENCES

### Time-bin entangled qubits for quantum communication created by femtosecond pulses

- Physics
- 2002

We create pairs of nondegenerate time-bin entangled photons at telecom wavelengths with ultrashort pump pulses. Entanglement is shown by performing Bell kind tests of the Franson type with…

### Cross time-bin photonic entanglement for quantum key distribution

- Physics
- 2013

We report a fully fibered source emitting cross time-bin-entangled photons at 1540 nm from type-II spontaneous parametric down-conversion. Compared to standard time-bin-entanglement realizations, the…

### Implementation of quantum state tomography for time-bin entangled photon pairs.

- PhysicsOptics express
- 2009

The way to implement QST on time-bin entangled photon pairs using a 1-bit delayed interferometer is clarified and experimental results for a demonstration of QST for time- bins generated using spontaneous four-wave mixing in a dispersion shifted fiber are provided.

### Pulsed Energy-Time Entangled Twin-Photon Source for Quantum Communication

- Physics
- 1999

A pulsed source of energy-time entangled photon pairs pumped by a standard laser diode is proposed and demonstrated. The basic states can be distinguished by their time of arrival. This greatly…

### Distribution of time-bin entangled qubits over 50 km of optical fiber.

- PhysicsPhysical review letters
- 2004

Using actively stabilized preparation and measurement devices, violation of the Clauser-Horne-Shimony-Holt Bell inequality is demonstrated by more than 15 standard deviations without removing the detector noise.

### Ultra-bright source of polarization-entangled photons

- Physics
- 1999

Utilizing the process of spontaneous parametric down-conversion in a novel crystal geometry, a source of polarization-entangled photon pairs has been provided that is more than ten times brighter,…

### Quantum optical waveform conversion.

- PhysicsPhysical review letters
- 2011

It is shown that nonlinear mixing of a quantum light pulse with a spectrally tailored classical field can compress the quantum pulse by more than a factor of 100 and flexibly reshape its temporal waveform while preserving all quantum properties, including entanglement.

### Polarization-entanglement-conserving frequency conversion of photons

- Physics
- 2011

Entangled photons play a pivotal role in the distribution of quantum information in quantum networks. However, the frequency bands for optimal transmission and storage of photons are often not the…

### A quantum pulse gate based on spectrally engineered sum frequency generation.

- PhysicsOptics express
- 2011

An implementation in a PPLN waveguide, based on spectrally engineered sum frequency generation (SFG), that allows us to pick well-defined spectral broadband modes from an ultrafast multi-mode state for interconversion to a broadband mode at another frequency.

### Two photon absorption and coherent control with broadband down-converted light.

- PhysicsPhysical review letters
- 2004

Using pulse-shaping methods, this work coherently control two-photon absorption in rubidium, demonstrating spectral and temporal resolutions that are 3-5 orders of magnitude below the actual bandwidth and temporal duration of the light itself.