研究目的
Investigating the implementation of a widely frequency-tunable parity-time (PT)-symmetric optoelectronic oscillator (OEO) based on a silicon microdisk resonator (MDR) for high-quality microwave generation.
研究成果
A widely tunable PT-symmetric OEO based on a silicon MDR was successfully implemented, achieving single-mode oscillation with a frequency tunable range from 2 to 12 GHz and a phase noise of -105 dBc/Hz at a 10 kHz frequency offset. The phase noise can be further reduced with an increased loop length.
研究不足
The phase noise can be further reduced by increasing the loop length. The maximum frequency of 12 GHz is limited by the bandwidth of the devices used.
1：Experimental Design and Method Selection:
The experiment involves the design of a PT-symmetric OEO using two mutually coupled optoelectronic loops with identical geometry, one with gain and the other with loss, implemented via the reciprocity of light propagation in an MDR.
2：Sample Selection and Data Sources:
A silicon MDR with a diameter of
3：7 μm and a bus waveguide width of 520 nm is used. List of Experimental Equipment and Materials:
Includes a tunable light source (Yokogawa AQ2201), phase modulator (JDSU), EDFA (FiberPrime Inc. EDFA-C-14-S-FA), PD (Optilab LR-12-A-M), and EAs (MultiLink modulator driver MTC5515-751).
4：1). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The setup involves coupling light into a PM, dividing it into two branches, transmitting through the MDR, combining signals, amplifying, and feeding back to the PM.
5：Data Analysis Methods:
Electrical spectra and phase noise are measured using an electrical spectrum analyzer (Agilent E4448A) and a signal analyzer (Agilent E5052B) with a down-converter (Agilent E5053A).
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down-converter
E5053A
Agilent
Working with the signal analyzer for phase noise measurement
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tunable light source
AQ2201
Yokogawa
Generating light waves for the experiment
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PD
LR-12-A-M
Optilab
Detecting the optical signal
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electrical spectrum analyzer
E4448A
Agilent
Measuring the electrical spectra
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signal analyzer
E5052B
Agilent
Measuring the phase noise
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phase modulator
JDSU
Modulating the light wave
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EDFA
EDFA-C-14-S-FA
FiberPrime Inc.
Amplifying the optical signal
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EAs
MTC5515-751
MultiLink
Amplifying the electrical signal
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