A coupled optoelectronic oscillator with three resonant cavities
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Department of Physics, College of Science, Guizhou University, Guiyang 550025, China

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This paper has been supported by the National Natural Science Foundation of China (Nos.61061004 and 61465002), and the Program for New Century Excellent Talents in University of Ministry of Education of China (No.NCET-10-0099).

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    Abstract:

    A new single-mode optoelectronic oscillator (OEO) with three coupled cavities is proposed and demonstrated. A Fabry-Perot (F-P) cavity fiber laser and an optical-electrical feedback branch are coupled together to construct an optoelectronic oscillator, where the F-P cavity fiber laser serves as a light source, and a modulator is placed in the laser cavity to implement reciprocating modulation, which simultaneously splits the laser cavity into two parts and forms a dual-loop configuration. To complete an optoelectronic oscillator, part of optical signal is output from the F-P cavity to implement the feedback modulation, which constructs the third cavity. Since only the oscillation signal satisfies the requirements of all the three cavities, a single-mode oscillation can be finally achieved. Three resonant cavities are successfully designed without adding more optoelectronic devices, and the side-modes can be well suppressed with low cost. The oscillation condition is theoretically analyzed. In the experimental demonstration, a 20 GHz single longitudinal mode microwave signal is successfully obtained.

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SHAN Yuan-yuan, JIANG Yang, BAI Guang-fu, MA Chuang, LI Hong-xia, LIANG Jian-hui. A coupled optoelectronic oscillator with three resonant cavities[J]. Optoelectronics Letters,2015,11(1):26-29

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  • Received:October 20,2014
  • Online: November 26,2015
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