Compact Phase Detector for Optical-Microwave Synchronization Using Polarization Modulation

We propose and demonstrate a compact optical-microwave phase detector taking advantage of polarization modulation. The proposed polarization modulator-based phase detector (PolM-PD) shows 460-attosecond residual timing jitter integrated from 1 Hz to 100 kHz when synchronizing an 8-GHz dielectric res...

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Bibliographic Details
Published in:Journal of lightwave technology 2018-10, Vol.36 (19), p.4267-4272
Main Authors: Wei, Juan, Zhang, Shuangyou, Kim, Jungwon, Pan, Shilong
Format: Article
Language:English
Subjects:
Adaptive optics
Fiber lasers
Microwave filters
Microwave generation
Microwave oscillators
Optical attenuators
Optical feedback
optical polarization
Optical pulses
phase detection
Phase detectors
phase locked loops
Polarization modulation
Sensors
Single sideband transmission
Synchronism
Timing jitter
Vibration
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Summary:We propose and demonstrate a compact optical-microwave phase detector taking advantage of polarization modulation. The proposed polarization modulator-based phase detector (PolM-PD) shows 460-attosecond residual timing jitter integrated from 1 Hz to 100 kHz when synchronizing an 8-GHz dielectric resonator oscillator to a free-running 250-MHz mode-locked Er-fiber laser. The absolute single-sideband phase noise of the locked 8-GHz DRO is -138 dBc/Hz (-165 dBc/Hz) at an offset frequency of 10 kHz (10 MHz). The proposed PolM-PD has a compact structure implemented by all commercially available components. Because no fiber loop and delay line are used, the proposed PolM-PD can be potentially integrated on a chip.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2018.2837671