Non-classical light field generator with phase self-compensation

Abstract

The invention belongs to the technical field of non-classical optics, and discloses a non-classical light field generator with phase self-compensation. The non-classical light field generator comprises a laser, a compressed light field generator, a first phase shifter, a beam splitter, a central controller, a balanced zero-beat detector and a spectrum analyzer; the compressed light field generatoris used for generating a compressed light field detected by the balanced zero-beat detector; an output signal of the balanced zero-beat detector is connected with the spectrum analyzer; an output endof the spectrum analyzer is connected with the central controller; an output end of the central controller is connected with an input end of a temperature controller, is used for changing the crystaltemperature through the temperature controller, finding the double resonance temperature of an optical parametric cavity amplifier according to the output signals of the single detectors at differentcrystal temperatures, and is further used for finding the phase self-compensation temperature of the optical parameter amplifier according to output signals of a single detector at different crystaltemperatures; and is further used for finding the phase self-compensation temperature of an optical parameter amplifier according to the compression degree of a first compressed light field at different crystal temperatures. The non-classical light field generator with the phase self-compensation provided by the invention improves the non-classical characteristics of the light field and can be applied to the field of non-classical light fields.

Description

technical field [0001] The invention belongs to the technical field of non-classical optics, and in particular relates to a phase self-compensating non-classical light field generator. Background technique [0002] Squeezed state light field is a non-classical light field that compresses the quantum noise of a certain orthogonal component below the limit of classical shot noise. The sensitivity of wave signal detection; in addition, two beams of single-mode squeezed light or one beam of double-mode squeezed light can be used to generate entangled light fields, and then applied to the research of quantum computing, quantum information and quantum communication. Therefore, the study of a non-classical light source with high compression degree that operates continuously and stably has become a hot spot in current scientific research. As early as 1985, Bell Laboratories in the United States first observed the squeezed state experimentally by using the four-wave mixing method; t...

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Problems solved by technology

However, the former will increase the difficulty of optical cavity adjustment, and the latter will introduce cavity loss, which is not conducive to the preparation of high compression and high stability squeezed state optical field

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