A device and method for testing the background light suppression ratio of an ultraviolet light communication receiver

A communication receiving and testing device technology, applied in transmission monitoring/testing/fault measurement systems, short-distance systems, free space transmission, etc., can solve the problems of test result errors, accuracy and reliability, and large fluctuations in spectral radiation, and achieve High modulation rate, accurate and reliable data

Active Publication Date: 2016-07-06
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Internal modulation method of gas discharge lamp: Since the gas discharge lamp is broad-spectrum or multi-spectral, and the ideal light source for "background light suppression ratio" calibration is single-spectrum and narrow-linewidth, even if a narrow-band filter is used The single spectral line of the gas discharge lamp is obtained from the sheet, and its energy is too weak, and the traceability of the value cannot be realized by the existing means
As the modulation rate increases, the gas discharge lamp is prone to "continuous fire" phenomenon, and the spectral radiation fluctuates greatly, so it is not suitable as a calibration light source
[0006] (2) Ultraviolet LED internal modulation method: In the invention patent titled "A Multi-band Modulation Light Source Based on Ultraviolet LED" filed in 2013 (corresponding application number is 201310587320.7), it is proposed to use ultraviolet LEDs with 266nm and 315nm bands The array generates ultraviolet modulation signals, which are used to simulate the working state of the transmitter of the ultraviolet communication system and the background stray light, but no traceability scheme is given
At present, the test method of UV modulated optical power cannot be found. If the UV optical power meter is directly used for testing, it will also face the problem of large error in test results, and the accuracy and reliability of the value cannot be guaranteed.

Method used

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  • A device and method for testing the background light suppression ratio of an ultraviolet light communication receiver
  • A device and method for testing the background light suppression ratio of an ultraviolet light communication receiver
  • A device and method for testing the background light suppression ratio of an ultraviolet light communication receiver

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Embodiment 1

[0031]The invention provides a background light suppression ratio test device for an ultraviolet communication receiver, which includes a 266nm / 325nm laser, an optical attenuator, an acousto-optic modulator, at least two diaphragms, a beam expander / collimator, and a function generator The 266nm / 325nm lasers respectively output lasers which are respectively attenuated by the optical attenuators, and are respectively incident on the acoustic light of the acousto-optic modulator at predetermined angles. The diffracted light is generated on the optical crystal, and the +1 or -1 order diffracted light is extracted by one of the apertures respectively; then the extracted diffracted beam is expanded and collimated by the beam expander / collimator respectively; 2. Trim the beam expanded / collimated laser spot respectively, use the calibrated detector and the lock-in amplifier respectively to obtain the optical power P of the standard modulated light, remove the detector and the lock-in a...

Embodiment 2

[0036] On the basis of the above embodiments, the present invention also provides a method for testing the background light suppression ratio of an ultraviolet communication receiver, which includes the following steps:

[0037] Step 1: After the 266nm / 325nm laser output laser light is attenuated by the optical attenuator, it is respectively incident on the acousto-optic crystal of the acousto-optic modulator at a predetermined angle to generate diffracted light, and one of the diaphragms is used to divide the +1 or - The first-order diffracted light is extracted;

[0038] Step 2: expand and collimate the extracted diffracted beams through beam expander / collimator mirrors;

[0039] Step 3: The second aperture trims the expanded / collimated laser spot respectively, and uses the calibrated detector and lock-in amplifier respectively to obtain the optical power P of the standard modulated light;

[0040] Step 4: Remove the detector and lock-in amplifier, put the receiver under te...

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Abstract

The invention provides a device and a method for testing the background light suppression ratio of an ultraviolet communication receiver machine. The device comprises a 266nm / 325nm laser device, an optical attenuator, an acousto-optic modulation, at least two diaphragms, a beam-expanding / collimating mirror, a function generator, a detector and a phase-locked amplifier, wherein receivers are mutually connected and mutually communicated. An ultraviolet modulation light power is detected by the detector and the phase-locked amplifier, thus ensuring the accuracy and reliability of data.

Description

technical field [0001] The invention belongs to the technical field of background light suppression ratio test of an ultraviolet light communication receiver, and in particular relates to a test method for the background light suppression ratio of an ultraviolet light communication receiver. Background technique [0002] As a new type of military communication system, ultraviolet light communication has the advantages of low eavesdropping rate, high anti-interference, omnidirectionality, and easy networking, and has become the focus of research by various military powers at home and abroad. The modulation and reception of ultraviolet light is the main difference between ultraviolet light communication and other common communication methods. Domestic engineering receivers mostly use photomultiplier tubes (PMT) as detectors, and place narrow-band filters in front of the detectors to To achieve the purpose of suppressing background light. However, these ultraviolet filtering t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/07H04B10/114
Inventor 朱兴邦王少水孙权社王国权赵发财郑祥亮韩忠
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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