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K-Band High Stablity and Resolution Frequency Synthesizers Using Forced Opto-Electronic Oscillators
Conference proceeding

K-Band High Stablity and Resolution Frequency Synthesizers Using Forced Opto-Electronic Oscillators

Tianchi Sun, Afshin S. Daryoush, Ajay Poddar, Li Zhang and Ulrich Rohde
2017 IEEE MTT-S INTERNATIONAL MICROWAVE AND RF CONFERENCE (IMARC), pp 58-60
01 Jan 2017

Abstract

Engineering, Electrical & Electronic Science & Technology dual drive Mach-Zehnder modulator fiber Bragg grating opto-electronic oscillator optical transversal filter Phase noise Transversal filters YIG filter Engineering Technology Telecommunications
Forced opto-electronics oscillator (OEO) is a very promising way to build low phase noise oscillators. Forced techniques of self-injection locking phase locking (SILDPLL) are integrated with narrowband tunable RF filters to build OEO system to further reduce the phase noise and suppress side mode generated among standard OEOs because of long fiber delays. The narrowband tunable RF filter is based on an optical wavelength tuned transversal filter using a fiber Bragg grating as delay element cascaded with current tuned YIG filter to accomplish a 2kHz frequency resolution over K-band. Second harmonic generated frequency synthesized signals with close-in to carrier phase noise of -127 dBc/Hz at 10 kHz offset are reported by V-pi operation of a Mach-Zehnder (MZM) over 18 GHz to 22 GHz. 19 '' rack mount system is also constructed and long-term stability of 4.5 kHz over 60 min is measured at K-band, while a 3.5 kHz drift is measured for a tabletop realization.

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Web of Science research areas
Engineering, Electrical & Electronic
Telecommunications
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