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Device capable of quickly and accurately adjusting output signal light interference of two optical cavities

An output signal and optical cavity technology, applied in the optical field, can solve the problems of high interference efficiency, high adjustment difficulty, time-consuming and laborious, etc., and achieve the effect of low cost, simple structure and high precision

Active Publication Date: 2018-02-09
山财高新科技(山西)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not only time-consuming and laborious, difficult to adjust, but also difficult to obtain high interference efficiency

Method used

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  • Device capable of quickly and accurately adjusting output signal light interference of two optical cavities
  • Device capable of quickly and accurately adjusting output signal light interference of two optical cavities
  • Device capable of quickly and accurately adjusting output signal light interference of two optical cavities

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Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, it is a schematic diagram of the working principle of a device that can quickly and accurately adjust the output signal light interference of two optical cavities according to the present invention. Adjustment for mode matching with two optical cavities. Firstly, the parameters of the fundamental-frequency light are shaped by the lens group placed in the optical path of the fundamental-frequency light, so that the fundamental-frequency light and the optical cavity can achieve mode matching; then, the parameters of the auxiliary light are shaped by the lens group placed in the auxiliary light path, so that The same auxiliary light and two optical cavities achieve mode matching; lock the cavity length of the two optical cavities until the resonance is enhanced, and obtain two beams of signal light output. Since the fundamental frequency light, auxiliary light and signal light have the same wavelength, according to the reversibility of light The...

Embodiment 2

[0031] This embodiment provides a specific implementation of a device that can quickly and accurately adjust the signal light interference output from two optical cavities. Such as figure 2 As shown, the fundamental frequency light output by the 1550nm single-frequency laser 0 is divided into two beams by the first optical beam splitter 3, and injected into the first optical cavity a and the second optical cavity b respectively, and the auxiliary light 90 is injected into the first optical cavity a in the opposite direction. And the second optical cavity b is used to generate double-frequency light, corresponding to a wavelength of 775nm. The adjustment steps of the output signal light interference of the device described in this embodiment are as follows:

[0032] Firstly, the mode matching efficiency between the first fundamental frequency light 1 and the optical cavity a is adjusted through the light guide mirror group 51 and the lens group 52 (the focal lengths are respe...

Embodiment 3

[0035] This embodiment provides another embodiment of a device that can quickly and accurately adjust the interference of signal light output from two optical cavities. Such as image 3 As shown, referring to Embodiment 2, the only difference from Embodiment 2 is that the second optical cavity b is composed of two plane mirrors (both with a transmittance of 1%) and a concave mirror with a radius of curvature R=1m. Among them, the inner end surface of the two plane mirrors is coated with T1550=1%, ​​the outer end surface is coated with AR1550, the inner end surface of the concave mirror is coated with HR1550, and the outer end surface is not coated. The total cavity length of the second optical cavity b is 420 mm, the corresponding base mode waist spot radius is 371 μm, and the distance between the base mode waist spot and the input mirror is L C / 2 (where L C Indicates the total cavity length of the second optical cavity b). The first electro-optic phase modulator 12 and th...

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PUM

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Abstract

A device capable of quickly and accurately adjusting output signal light interference of two optical cavities comprises a laser device, the first optical cavity, the second optical cavity, a first beam splitting unit and a second beam splitting unit and also comprises an auxiliary light unit which intercepts and captures first base frequency light output by the second beam splitting unit, uses thefirst base frequency light as auxiliary light to be output to the first base frequency light and then injects the light into the first optical cavity and the second optical cavity along reverse lightpaths of first base frequency light and second base frequency light after beam splitting. By converting the interference of output signal light of the two optical cavities uneasy to adjust into adjustment of mode matching between one beam of auxiliary light and the two optical cavities, the interference adjustment process is simple, quick and efficient, and the accuracy is high, an auxiliary light source is directly guided from an existing light path without introduction of a new light source element, the auxiliary light coincides with an original light path, and the device is simple in structure and low in cost. The output signal light in the two optical cavities are reshaped into parallel light by utilizing one auxiliary light path, so that signal light is more convenient to transmit and reshape in space.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a device capable of quickly and accurately adjusting the interference of output signal light from two optical cavities. 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. The balanced zero-beat detection device is an effective method for detecting the squeezed light field and the entangled light field. In the experiment, an optical beam splitter with a splitting ratio of 50 / 50 is required to combine a beam of background light and squeezed light output by a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/03G02F1/21G02F1/35G02F2/00
CPCG02F1/03G02F1/21G02F1/3517G02F1/353G02F1/3544G02F2/00
Inventor 王雅君张文慧郑耀辉
Owner 山财高新科技(山西)有限公司