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Low-drift optoelectronic oscillator based on a phase modulator in a sagnac loop

Hosseini, S. E ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/TMTT.2016.2640286
  3. Abstract:
  4. A low-drift optoelectronic oscillator (OEO) is developed and experimentally shown. In the proposed OEO, a fiber Sagnac interferometer, including an optical phase modulator (PM) and a nonreciprocal bias unit, functions as an intrinsically drift-free intensity modulator. The phase noise of the proposed OEO is modeled in phase space, which is verified by experiments. Phase noise and frequency stability of the photonically generated microwave signals are measured. The single-sideband phase noise of the generated microwave signal is -106.6 dBc/Hz at 10-kHz offset from the 10.833-GHz carrier, with 120-fs rms timing jitter integrated from 1 kHz to 10 MHz. Frequency drift measurements show ±0.85-ppm maximum fractional frequency deviation over 35 h, mainly caused by drift of the fiber delay line. © 1963-2012 IEEE
  5. Keywords:
  6. Bias drift ; Intensity modulation ; Long-term stability ; Optoelectronic oscillators (OEOs) ; Sagnac loop ; Light modulators ; Optoelectronic devices ; Phase modulation ; Phase space methods ; Timing jitter ; Fiber delay line (FDL) ; Fiber sagnac interferometers ; Fractional frequencies ; Intensity modulators ; Microwave signals ; Optical phase modulator ; Opto-electronic oscillator ; Single side bands ; Phase noise
  7. Source: IEEE Transactions on Microwave Theory and Techniques ; Volume 65, Issue 7 , 2017 , Pages 2617-2624 ; 00189480 (ISSN)
  8. URL: https://ieeexplore.ieee.org/document/7817752