Generation of multi-carrier based on a recirculating frequency shifter with delay interferometer
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This work has been supported by the National Natural Science Foundation of China (No:61205065), the Specialized Research Fund for the Doctoral Program of Higher Education of China (No.20110005110014), and the Provincial Natural Foundation of Shandong (No.ZR2010FM043).

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    Abstract:

    Recirculating frequency shifter (RFS) can generate stable multi-carrier, but the carrier-to-noise-ratio (CNR) is limited because noise is accumulated round by round in the recirculation loop structure. A modified RFS with a delay interferometer (DI) is proposed in this paper. The DI can suppress the accumulated noise, and enhance the CNR of multi-carrier. The principle of the generation of high quality multi-carrier based on an RFS with DI is analyzed theoretically. 50 stable carriers with spacing of 10.7 GHz are successfully generated. The flatness of 50 stable carriers is 3 dB, and the CNR is 43 dB which is increased by 3 dB compared with the structure without DI.

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Hong-qiao Cheng, Li-xia Xi, Jia-chuan Lin, Xiao-guang Zhang, Xia Zhang, Jian-rui Li. Generation of multi-carrier based on a recirculating frequency shifter with delay interferometer[J]. Optoelectronics Letters,2013,9(6):418-420

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  • Online: October 06,2015
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