Versatile wideband balanced detector for quantum optical homodyne tomography

Kumar, Rupesh; Barrios, E.; MacRae, Andrew; Cairns, Edward C.; Huntington, Elanor H.; Lvovsky, A. I.

doi:10.1016/j.optcom.2012.07.103

Cited by 115 publications

(106 citation statements)

References 18 publications

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“…A first one comes from the overall losses coming from propagation and detection. This includes the propagation efficiency η prop , the mode overlap limited by the visibility V of the local oscillator-signal interference η vis = V 2 , the efficiency of the photodiodes η phot and the electronic noise of the detection η noise (the electronic noise is 20 dB below vacuum noise at the central frequency) [21]. They sum up to an overall detection loss of 1 − η tot =15%, which is taken into account to give the values with correction.…”

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confidence: 99%

High-fidelity single-photon source based on a Type II optical parametric oscillator

et al. 2012

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Using a continuous-wave type-II optical parametric oscillator below threshold, we have demonstrated a novel source of heralded single-photons with high-fidelity. The generated state is characterized by homodyne detection and exhibits a 79% fidelity with a single-photon Fock state (91% after correction of detection loss). The low admixture of vacuum and the well-defined spatiotemporal mode are critical requirements for their subsequent use in quantum information processing.

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confidence: 99%

High-fidelity single-photon source based on a Type II optical parametric oscillator

et al. 2012

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“…We make use of a wideband, flat-gain homodyne detector based on [33]. A specially ordered photodiode (Hamamatsu Photonics, S5971SPL), which is anti-reflection coated at 860 nm and whose quantum efficiency is higher than 98%, is used.…”

Section: Methodsmentioning

confidence: 99%

Creation and measurement of broadband squeezed vacuum from a ring optical parametric oscillator

et al. 2016

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We report a 65 MHz-bandwidth triangular-shaped optical parametric oscillator (OPO) for squeezed vacuum generation at 860 nm. The triangle structure of our OPO enables the round-trip length to reach 45 mm as a ring cavity, which provides a counter circulating optical path available for introducing a probe beam or generating another squeezed vacuum. Hence our OPO is suitable for the applications in high-speed quantum information processing where two or more squeezed vacua form a complicated interferometer, like continuous-variable quantum teleportation. With a homemade, broadband and low-loss homodyne detector, a direct measurement shows 8.4 dB of squeezing at 3 MHz and also 2.4 dB of squeezing at 100 MHz.

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“…According to its definition in Eq. (4.3), the CMRR is the difference of output power between the balanced and the unbalanced frequency spectrums value [5], thus is 55.04dB.…”

Section: Performance and Characterizationmentioning

confidence: 99%

High-speed Balanced Homodyne Detector for Quantum Information Applications

Wang¹,

Chen²,

Zhang

2017

J. Phys.: Conf. Ser.

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Abstract.We have developed a balanced homodyne detector capable of working with femtosecond pulsed light at a 76MHz repetition rate and 800nm wavelength. It exhibits a common mode rejection ratio of 55dB, and can achieve the shot-noise limit. Provided with good performance, our detector can be used in high speed quantum information applications. IntroductionWith the powerful ability of demonstrating complete characterization of a quantum light state, highspeed balanced homodyne detection is essential for foundational analysis of quantum optics on many areas, such as quantum process tomography, quantum key distribution and quantum precision measurement. By measuring the quadrature operators of the input signal state, the balanced homodyne detector can then obtain the quasi probability distribution or in other words, the Wigner function after kinds of quantum state tomography [1]. The first experiment determining the quantum state of light field was proposed by Smithy, Beck, Cooper, Raymer, et al in 1993 [1,2]. Nowadays, the quantum state tomography with balanced homodyne detector has become a standard method in quantum information field.Over the past decades, remarkable effort has been made to make a balanced homodyne detector with satisfactory performance applying to various applications [3]. Conventionally, researchers use a circuit with a dual-stage amplifier to gain higher magnification and stability, but this design will bring extra noise as well. In our experiments, a single-stage simple-construct amplifier homodyne detector was also found able to satisfy the performance requirements of homodyne detectors: (a) low enough electrical noise competent to beat the shot-noise limit which is the key requirement to make a quantum measurement; (b) high enough bandwidth to distinguish 76 MHz repetition rate femtosecond optical pulse; (c) high common mode rejection ratio (CMRR) to make a balance between the two photodiodes [1].

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Versatile wideband balanced detector for quantum optical homodyne tomography

Cited by 115 publications

References 18 publications

High-fidelity single-photon source based on a Type II optical parametric oscillator

High-fidelity single-photon source based on a Type II optical parametric oscillator

Creation and measurement of broadband squeezed vacuum from a ring optical parametric oscillator

High-speed Balanced Homodyne Detector for Quantum Information Applications

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