研究目的
Investigating the use of short-distance cables in plastic optical fiber as a flexible means of interconnection between single-mode optical fibers or as a coupling medium between devices with single-mode optical inputs/outputs located in data centers/video headends.
研究成果
The feasibility of using short-length cables in PF-POF was verified when inserted in high-capacity SMF transmission media, demonstrating the system's transmission viability in optically transparent and diverse media such as silica, polymer and space-free.
研究不足
The high attenuation of plastic fibers and the need for an appropriate interface between SMF and PF-POF were noted as limitations.
1：Experimental Design and Method Selection:
The experiment involved a bidirectional system at 1550 nm formed by an optical link in SMF and PF-POF, using DP-QPSK modulation and Nyquist pulse shaping.
2：Sample Selection and Data Sources:
The data stream consisted of a bidirectional 400 Gbps optical transmission using four wavelength channels.
3：List of Experimental Equipment and Materials:
Included Distributed Feedback lasers, External Cavity Lasers, Arbitrary Waveform Generator, Mach-Zehnder modulator, Erbium-Doped Fiber Amplifier, variable optical attenuator, and optical fiber collimators.
4：Experimental Procedures and Operational Workflow:
The optical signal was detected by a coherent receiver and subjected to digital signal processing in offline to recover the signal and estimate the bit error rate.
5：Data Analysis Methods:
The BER was calculated by bit error counting, obtained through the mean between the two polarizations.
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Arbitrary Waveform Generator
Agilent M8195A
Agilent
Produces a 25 Gbaud electrical signal in QPSK with 211-1 pseudo random binary sequence and improved Nyquist pulse shaping.
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optical fiber collimators
Col-A, Col-B
Thorlabs
Used to adapt the different NA of SMF and PF-POF in order to standardize the behavior of bidirectional transmission.
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Distributed Feedback lasers
DFB
Used as light sources in the DP-QPSK-Tx module.
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External Cavity Lasers
ECL
Used as light sources in the DP-QPSK-Tx module and as local oscillator in the PD-CoRx module.
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Mach-Zehnder modulator
IQ-MZM
Modulates the optical signal with the electrical signal from the AWG.
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Erbium-Doped Fiber Amplifier
EDFA
Amplifies the optical signal before entering the transmission channel.
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variable optical attenuator
VOA
Adjusts the launch power for the DP-QPSK signal.
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