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OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device and method

A wavelength conversion and low-polarization technology, applied in the field of low-cost, low-polarization-sensitive and wide-tunable wavelength conversion devices, can solve the problems of unfavorable commercial production and high system cost

Inactive Publication Date: 2019-04-05
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two dual-pump wavelength conversion schemes both use three lasers, and both use external modulation to modulate the signal. The system cost is high, which is not conducive to commercial production.

Method used

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  • OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device and method
  • OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device and method
  • OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device and method

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Embodiment Construction

[0044] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] Such as figure 1 As shown, in this embodiment, the device includes:

[0046] Off-line digital signal processing module 1 at the sending end, used to generate electrical OFDM signals;

[0047] A directly modulated laser 2 for generating signal light modulated with an electrical OFDM signal;

[0048] A single-mode laser 3 for generating pump light;

[0049] The polarization controller 4 is used to adjust the polarization angle of the signal light;

[0050] The polarization controller 5 is used to adjust the polarization state of the pump light to form an angle of 45 degrees with the main axis of the first polarization beam splitter;

[0051] An optical coupler 6, used to couple signal light and pump light together;

[0052] Polarization beam splitter 7, used to split the coupled signal light and pump light into two mutually orthogon...

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Abstract

The invention discloses an OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device and method, and belongs to the field of all-optical wavelength conversion. Adirect modulation laser is adopted to realize light intensity modulation to generate an optical OFDM signal, a polarization diversity structure is adopted, the coupled signal light and pump light aredivided into two mutually orthogonal polarization modes (X polarization direction and Y polarization direction) by a polarization beam splitter, FWM-based all-optical wavelength conversion on the same polarization state is separately realized in two SOA, the two mutually orthogonal polarization modes after FWM are coupled together by a polarization beam combiner, then the converted optical OFDM signal is filtered by an optical band pass filter and is converted into an electric OFDM signal after photoelectric detection, and the OFDM signal is received by a receiver. According to the OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device and method, no additional external modulator is required to modulate the signal, the system cost is reduced; andthe OOFDM signal-based low-cost low-polarization sensitive wide tunable wavelength conversion device is simple in structure, and has the advantages of wide adjustment, low polarization sensitivity, easy system integration and high practicability.

Description

technical field [0001] The invention belongs to the technical field of All Optical Wavelength Conversion (AOWC for short), and specifically relates to a low-cost, low-polarization-sensitive, wide-tunable wavelength conversion device and method based on OOFDM signals. Background technique [0002] Since Kao Kung proposed in 1966 that quartz glass fiber could be used as the medium of optical communication, optical fiber has played an increasingly important role in modern communication due to its advantages of large capacity, strong anti-interference ability, low loss, and good confidentiality. With the explosive growth of data services represented by big data and artificial intelligence in the Internet era, people's demand for network bandwidth has grown exponentially. High-speed, high-quality, and ultra-large-capacity optical fiber communication systems have become an inevitable development goal. Although the number of wavelengths at the optical fiber communication window is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01G02F2/00H04L27/26
CPCG02F1/0136G02F2/00G02F2/004G02F2/006H04L27/2601
Inventor 周慧莘云龙陈明
Owner HUNAN NORMAL UNIVERSITY
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