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We present a quantum theory of nondegenerate phase-sensitive parametric amplification in a χ (3) nonlinear medium. The non-zero response time of the Kerr (χ (3)) nonlinearity determines the… (More)

- Adam R Altman, Kahraman G. Köprülü, Eric Corndorf, Prem Kumar, Geraldo A. Barbosa
- Physical review letters
- 2005

Through scanned coincidence counting, we probe the quantum image produced by parametric down-conversion with a pump-beam carrying orbital angular momentum. Nonlocal spatial correlations are… (More)

We have developed high speed gated-mode single-photon counters based on InGaAs/InP avalanche photodiodes for use at 1.55 μm wavelength. Operation at room temperature allows afterpulse probability to… (More)

We report a synchronously pumped optical parametric oscillator that generates the sum frequency of the pump and the signal wavelengths. A single KTiOPO4 (KTP) crystal is used for both parametric… (More)

- T Kartalo Lu, Kahraman G. Köprülü, Orhan Aytür, M L Sundheimer, William P. Risk
- Optics letters
- 1998

We report a femtosecond optical parametric oscillator based on a periodically poled KTiOPO(4) crystal for which quasi-phase matching is achieved with a 24-microm poling period. The singly resonant… (More)

We investigate the generation of amplitude-squeezed states with degenerate optical parametric amplifiers that are pumped by focused Gaussian beams. We present a model that facilitates the calculation… (More)

We present a quantum theory of nondegenerate phase-sensitive parametric amplification in a χ nonlinear medium. The non-zero response time of the Kerr (χ) nonlinearity determines the quantum-limited… (More)

- Kahraman G. Köprülü, Yu-Ping Huang, Geraldo A. Barbosa, Prem Kumar
- Optics letters
- 2011

Using spontaneous optical parametric downconversion, we experimentally demonstrate heralded generation of shaped single photons, whose modes are tailored indirectly by applying amplitude modulation… (More)

- T Kartalo Lu, Kahraman G. Köprülü, Orhan Aytür
- Optics letters
- 1997

We report a synchronously pumped intracavity frequency-doubled optical parametric oscillator that employs a single KTiOPO(4) crystal for both parametric generation and frequency doubling. Both… (More)

This paper investigates the generation of quadrature-squeezed states of light using a degenerate optical parametric amplifier~DOPA! that is pumped by a focused Gaussian beam. The formulation that is… (More)