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- Title
Polarization controlled dispersion tunable optoelectronic oscillator and frequency octupling without bandpass filter.
- Authors
Kumar, Ritesh; Raghuwanshi, Sanjeev Kumar
- Abstract
In this paper, a wavelength and dispersion tunable optoelectronic oscillator is proposed to generate high frequency microwave signals. The proposed methodology is based on a polarization modulator, a tunable dispersion module (TDM), and a variable optical delay line (VODL). The frequency of the generated signal is changed by tuning the dispersion of TDM. Different dispersion values of TDM have been achieved by changing the polarization angle of the polarization controller. The optical signal after TDM is processed through VODL, which avoids the need for a narrowband optical bandpass filter and gives highly stable microwave frequencies. A highly stable microwave signal with frequency tunability in the range of 14.4–17.6 GHz is generated. Once a stable microwave frequency is generated through the optoelectronic oscillator, it is further processed to get frequency octupling without using an additional modulator. The dispersion tunability of the system gives a relatively large variation in oscillation frequencies compared to wavelength tunability. Also, this avoids the need for a tunable notch filter required for the frequency multiplication of various oscillating frequencies. The proposed technique is theoretically analyzed and experimentally validated. Phase noise performance, frequency tunabilty, and frequency octupling of the generated signal is experimentally demonstrated.
- Subjects
BANDPASS filters; NOTCH filters; BREWSTER'S angle; PHASE noise; DISPERSION (Chemistry); DELAY lines; FILTERS &; filtration
- Publication
Optical & Quantum Electronics, 2023, Vol 55, Issue 12, p1
- ISSN
0306-8919
- Publication type
Article
- DOI
10.1007/s11082-023-05395-3