High-impedance pump noise suppression was used to generate amplitude squeezing in an index-guided quantumwell laser. Light exhibiting photon-number noise 1.4 dB below the shot-noise limit was observed, and the corresponding polarization properties were examined. an unsaturated detector revealed 2.9 dB of squeezing.
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| http://dx.doi.org/10.1364/ol.18.000379 | DOI Listing |
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- Scientists are working on a new type of microscope called Quantum-enhanced stimulated Raman scattering (QESRS) that helps see tiny details in molecules by improving how well they can detect weak signals.
- The problem with older QESRS microscopes was that they couldn't detect super weak signals as well as other advanced microscopes because they didn't use enough power.
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High-precision cavity locking is crucial for squeezing optical fields. Here, a bootstrapped low-noise photodetector is utilized in the generation process of the squeezed state of light. This process is based on a combination of a modified trans-impedance amplifier (TIA) circuit and a two-stage bootstrap amplifier circuit.
View Article and Find Full Text PDFSqueezed states of light have received renewed attention due to their applicability to quantum-enhanced sensing. To take full advantage of their reduced noise properties to enhance atomic-based sensors, it is necessary to generate narrowband near or on atomic resonance single-mode squeezed states of light. We have previously generated bright two-mode squeezed states of light, or twin beams, that can be tuned to resonance with the D1 line of Rb87 with a non-degenerate four-wave-mixing process in a double-lambda configuration in a Rb85 vapor cell.
View Article and Find Full Text PDFWe present an experimental method for the generation of amplitude squeezed high-order vector beams. The light is modified twice by a spatial light modulator such that the vector beam is created by means of a collinear interferometric technique. A major advantage of this approach is that it avoids systematic losses, which are detrimental as they cause decoherence in continuous-variable quantum systems.
View Article and Find Full Text PDFWe demonstrate experimentally the quantum frequency down-conversion of a bright amplitude-squeezed optical field via a high efficiency difference frequency generation process. 532 nm amplitude-squeezed light with squeezing of 1.0 dB is successfully translated to 810 nm amplitude-squeezed light with squeezing of 0.
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