研究目的
To design and experimentally demonstrate an improved tunable optoelectronic oscillator (OEO) based on a dual-parallel Mach–Zehnder (MZ) modulator embedded with a sub-MZ modulator for Ku band applications, achieving single-mode oscillator operation with a single feedback loop and without any electrical filters.
研究成果
The proposed tunable OEO based on a dual-MZ modulator with a single feedback loop operates effectively in the Ku band, with strong oscillations at 12 GHz and a phase noise of ?90 dBc Hz?1. It also demonstrates high sensitivity as a strain and temperature sensor.
研究不足
The phase noise performance is limited by the flicker noise of the photodetector. The tunability of the proposed OEO may be further enhanced by increasing wavelength or dispersion.
1：Experimental Design and Method Selection:
The OEO is designed using a dual-parallel MZ modulator with a sub-MZ modulator, a single feedback loop, and without any electrical filters. The microwave power expression at the output of the photodetector is developed using the Taylor series expansion method.
2：Sample Selection and Data Sources:
Continuous-wave light from a tunable laser is used, and the output is measured using an optical spectrum analyzer and an electrical spectrum analyzer.
3：List of Experimental Equipment and Materials:
Includes a tunable laser (Yokogawa AQ2200-136), dual-parallel MZ modulator (MXIQER-LN-30), LC-FBG, photodetector (Newport), and electrical spectrum analyzer (ROHDE & SCHWARZ FSL MODEL.18).
4：8). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The light from the laser is injected into the modulator, amplified, and then measured. The signal is detected by a PD, and the electrical spectrum is measured.
5：Data Analysis Methods:
The microwave power expression is used to calculate the electrical spectrum and accumulated dispersion. Phase noise is also examined.
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tunable laser
AQ2200-136
Yokogawa
Provides continuous-wave light for the experiment
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optical spectrum analyser
MS9710B
ANRITSU
Measures the optical spectrum of the output
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electrical spectrum analyser
FSL MODEL.18
ROHDE & SCHWARZ
Measures the electrical spectrum of the generated microwave signal
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dual-parallel MZ modulator
MXIQER-LN-30
Modulates the light for generating the optical comb
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photodetector
Newport
Detects the optical signal and converts it to an electrical signal
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