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A Resonant Electro-optic Modulator with Reduced Residual Amplitude Modulation

An electro-optical modulator and amplitude modulation technology, applied in instruments, optics, nonlinear optics, etc., can solve the problems of uneven electric field distribution and large residual amplitude modulation, and achieve the effect of reducing residual amplitude modulation and voltage amplitude

Active Publication Date: 2022-03-18
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing commercial electro-optic modulators generally use a rectangular parallelepiped nonlinear crystal, which will produce a parasitic etalon effect, coupled with the birefringence effect of the electro-optic crystal and uneven electric field distribution, RF power jitter and laser frequency jitter and other reasons, would produce a large residual amplitude modulation

Method used

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  • A Resonant Electro-optic Modulator with Reduced Residual Amplitude Modulation
  • A Resonant Electro-optic Modulator with Reduced Residual Amplitude Modulation
  • A Resonant Electro-optic Modulator with Reduced Residual Amplitude Modulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A resonant electro-optic modulator for reducing residual amplitude modulation, comprising a base 16, on which an insulating gasket 15 is connected by screws, and a temperature-controlled copper furnace is arranged on the insulating gasket 15;

[0048] The temperature-controlled copper furnace also includes a temperature-controlled copper furnace shell 5, a TEC semiconductor refrigerator 6, a thermal insulation sheet 7, a temperature-controlled copper furnace cover 8, a temperature-controlled copper furnace seat 9, a wedge-shaped crystal 10, and a wiring insulation sheet 11 , DC terminal electrode 12 temperature-controlled copper furnace outer base 13 and AC terminal electrode 14;

[0049] The temperature-controlled copper furnace outer base 13 is connected with the temperature-controlled copper furnace shell 5 wiring insulation sheet 11 by screws to form a closed cavity; the temperature-controlled copper furnace outer base 13 is L-shaped, and is connected to the temperat...

Embodiment 2

[0060] Such as figure 1 As shown in the schematic diagram of the decomposition structure of the resonant electro-optic modulator, a resonant electro-optic modulator that reduces residual amplitude modulation:

[0061] Such as Figure 13 , 14 As shown in the schematic diagram of the structure of the insulating spacer and the base of 15, two base M4 countersunk holes 161 are provided on the base 16, and two threaded holes 152 at the bottom of the insulating spacer M4 are provided on the insulating spacer 15, and the screws pass through Two base M4 countersunk holes 161 and two insulating gaskets M4 bottom threaded holes 152, the base 16 is fixedly connected with the insulating gasket 15;

[0062] Such as Figure 12 and 13 As shown in the schematic diagram of the structure of the outer base of the temperature-controlled copper furnace and the insulating gasket, four insulating gasket M2 countersunk holes 151 are arranged on the insulating gasket 15, and four The temperature-...

Embodiment 3

[0078] A method for testing a resonant electro-optic modulator that reduces residual amplitude modulation, comprising the following steps:

[0079] Step 1, stick the wedge-shaped crystal in the heat-retaining copper furnace, and solder the electrode wires of the AC end and DC end of the wedge-shaped crystal to the wires of the TEC and thermistor respectively to their respective coupling heads;

[0080] Step 2, assemble the resonant electro-optic modulator, start the all-solid-state single-frequency Nd:YVO4 laser 1064nm laser, use its stable output of 1064nm light and collimate the beam;

[0081] Step 3, after collimating the beam An optical isolator (OI1) placed behind the light is used to minimize back reflections.

[0082] Step 4, followed by placing a Glan-Thompson prism (GTP) to ensure that the purity of the linearly polarized beam incident on the EOM is better than 1:100000.

[0083] Step 5, place the electro-optical amplitude modulator behind it, and inject the light in...

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Abstract

The invention discloses a resonant electro-optical modulator for reducing residual amplitude modulation, which belongs to the technical field of optical modulation. The resonant electro-optic modulator of the present invention includes a base, an insulating gasket, a temperature-controlled copper furnace, a circuit board base, an LC resonant circuit board, a double-layer cover and a circuit board shell, and each component is connected by screws to form a closed space, wherein the temperature control The copper furnace also includes a temperature-controlled copper furnace shell, a TEC semiconductor refrigerator, a heat shield, a temperature-controlled copper furnace cover, a temperature-controlled copper furnace seat, a wedge-shaped crystal, a heat-insulated sheet for wiring, a temperature-controlled copper furnace outer base at the DC electrode end and AC terminal. The invention provides a resonant electro-optic modulator with reduced residual amplitude modulation, improves the modulation performance of the electro-optic modulation device, reduces the residual amplitude modulation in phase modulation, and reduces the influence of external temperature changes on the performance of the modulator.

Description

technical field [0001] The invention belongs to the technical field of optical modulation, and in particular relates to a resonant electro-optical modulator for reducing residual amplitude modulation. Background technique [0002] As a kind of nonclassical light, squeezed state has great application potential in the field of quantum optics, and is an important quantum resource in the fields of gravitational wave detection, precision measurement, and quantum information. In the experimental preparation system of the squeezed state light field, the performance of the servo control system is the key technology to obtain the highly compressed quantum squeezed state. [0003] In the feedback control system based on electro-optic phase modulation, due to the electro-optic effect of the electro-optic crystal, that is, when the voltage is applied to the electro-optic crystal, the distribution of the refractive index of the electro-optic crystal will change in all directions, so the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/03
CPCG02F1/0305G02F1/0327G02F1/0311
Inventor 郑耀辉焦南婧李瑞鑫田龙王雅君
Owner SHANXI UNIV
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