• Optoelectronics Letters
  • Vol. 15, Issue 1, 11 (2019)
Jing-wen GONG*, Xiao-jun LI, Qing-gui TAN, Dong LIANG, and Wei JI-ANG
Author Affiliations
  • China Academy of Space Technology (Xi'an), Xi'an 710100, China
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    Abstract

    A bandwidth-reconfigurable filter is necessary to meet the need of growing communication capacity and signal cover-age frequency range. The stimulated Brillouin scattering (SBS) gain spectrum as a filter passband is used to extract de-sired microwave signals. Due to the fact that the passband is formed by mapping the Brillouin gain spectrum, band-width reconfigurability can be implemented by changing Brillouin gain linewidth. In this paper, a scheme using a 5-lines optical comb acting as a Brillouin pump is experimentally demonstrated. The spectrum of the 5-lines optical comb is extended by a binary phase shift keying (BPSK) pulse modulated signal. Experiments have shown that the 3-dB and 20-dB bandwidths of the filter are 196 MHz and 257 MHz, respectively, and its 20-dB shape factor is 1.31. The passband ripple is ~3.5 dBm with stop-band rejection of 20 dBm under 15 dBm optical pump power.
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    GONG Jing-wen, LI Xiao-jun, TAN Qing-gui, LIANG Dong, JI-ANG Wei. Bandwidth-reconfigurable single-passband microwave photonic filter based on stimulated Brillouin scattering[J]. Optoelectronics Letters, 2019, 15(1): 11
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    Received: Jul. 15, 2018
    Accepted: Aug. 13, 2018
    Posted: Jan. 1, 2019
    Published Online: Apr. 11, 2019
    The Author Email: Jing-wen GONG (jingwengong123@163.com)