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Device and method for detecting high-speed optical communication transmitting equipment

A technology of transmitting equipment and optical communication, applied in electromagnetic wave transmission systems, electrical components, transmission systems, etc., can solve the problems of opaque symbol rate of clock synchronization circuit, achieve the effect of convenient inspection of products, and reduce the difficulty and cost of implementation

Active Publication Date: 2018-09-04
杨爱英
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem that the high-performance electric oscilloscope is limited by the complex clock synchronization circuit and the symbol rate is opaque, and proposes a device and method for detecting high-speed optical communication transmitting equipment

Method used

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  • Device and method for detecting high-speed optical communication transmitting equipment
  • Device and method for detecting high-speed optical communication transmitting equipment
  • Device and method for detecting high-speed optical communication transmitting equipment

Examples

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Embodiment 1

[0044] Embodiment 1 describes a device and method for detecting high-speed optical communication transmitting equipment of the present invention, the principle of detecting high-speed optical communication transmitting equipment, the composition and functions of the device. Such as figure 1 and figure 2As shown, the pseudo-random sequence modulates the laser in the optical transmission device to output the optical transmission signal, the high-speed photodetector converts the optical transmission signal output by the optical transmission device into a baseband analog electrical signal, and the low-speed analog-to-digital converter unit converts the baseband analog electrical signal Sampling to obtain a discrete digital sequence; and then through digital equalization and filtering to obtain a balanced digital sequence. The equalized digital sequence is processed synchronously by Chirp Z transform software to obtain its equivalent synchronous time. According to the equivalent...

Embodiment 2

[0046] This embodiment 2 describes the application of a device and method for detecting high-speed optical communication transmission equipment of the present invention to detect the eye diagram of a 10 Gbit / s optical transmission signal generated by an intensity-modulated optical transmitter. In this example, the experimental system such as image 3 As shown, a continuous laser, a Mach-Zehnder intensity modulator and a pseudo-random sequence generator simulate optical communication transmitting equipment: the optical power of the laser is 3.0dBm, and the pseudo-random sequence generator generates a pseudo-random sequence with a rate of 10Gbit / s. After shaping and amplifying, the Mach-Zehnder intensity modulator is driven to modulate the intensity of the continuous laser and output the intensity-modulated light emission signal.

[0047] The bandwidth of the photodetector is 10GHz, and the sampling rate of the analog-to-digital converter is 80MHz. Such as Figure 4 As shown, ...

Embodiment 3

[0049] This embodiment 3 describes the application of a device and method for detecting high-speed optical communication transmission equipment of the present invention to detect the eye diagram and constellation of the 10G baud QPSK optical transmission signal produced by the optical transmitter modulated by quaternary phase shift keying (QPSK) picture. In this example, the experimental system such as Figure 6 As shown, the continuous laser, the I-Q modulator and the arbitrary waveform generator simulate the QPSK modulation format optical communication transmitting equipment: the optical power of the laser is 3.0dBm, the arbitrary waveform generator generates a pseudo-random sequence with a rate of 10G baud, after pulse shaping and Amplified to drive the I-Q modulator. The I-channel modulator and the Q-channel modulator generate two binary phase-shift keying optical signals respectively. Adjust the phases of the I-way modulator and the Q-way modulator so that the two-way m...

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Abstract

The invention discloses a device and method for detecting high-speed optical communication transmitting equipment, and belongs to the optical transmitting equipment and signal detection technology inthe optical communication field. The device comprises a high-speed photoelectric detector unit, a low-speed analog-to-digital converter unit, an equalization filtering processing unit, a software synchronous processing unit, and a display unit. The method comprises the following steps: 1, outputting a modulated optical transmitting signal through the optical transmitting equipment; 2, converting the optical transmitting signal output by the optical transmitting equipment into a baseband analog electric signal; 3, sampling the baseband analog electric signal to obtain a discrete digital sequence; 4, performing the digital equalization filtering processing to obtain an equalization digital sequence; 5, performing the chirp Z-conversion software synchronous treatment to obtain equivalent synchronization time of the equalization digital sequence; and 6, performing eye pattern reconstruction and display on the equalization digital sequence, comparing with the preset eye pattern template tojudge whether the optical transmitting equipment is qualified. Through the device and method disclosed by the invention, the realization difficulty and cost are effectively reduced; the small and portable analyzer can be developed so as to satisfy the demands of quickly and conveniently checking the products.

Description

technical field [0001] The invention relates to a device and a method for detecting high-speed optical communication transmitting equipment, belonging to optical transmitting equipment and signal detection technology in the field of optical communication. Background technique [0002] With the improvement of users' access network bandwidth and the increase of the number of users, the capacity of optical fiber transmission network is further increased, which requires higher symbol rate, higher order modulation format and higher spectral efficiency. At present, the bit rate of a single wavelength in an optical communication system is evolving to a rate of 100 Gbits or even higher, and the optical communication transmitting equipment with a single wavelength symbol rate of 28 Gbaud has been commercialized on a large scale. How to quickly and conveniently check whether the high-speed optical communication transmitter module is qualified is a problem that manufacturers of optical...

Claims

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Application Information

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IPC IPC(8): H04B10/079
Inventor 杨爱英
Owner 杨爱英
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