TY - JOUR
T1 - A simplified filterless photonic frequency octupling scheme based on cascaded modulators
AU - Zhang, Wu
AU - Wen, Aijun
AU - Gao, Yongsheng
AU - Zheng, Hanxiao
AU - Chen, Wei
AU - He, Hongye
N1 - Publisher Copyright:
© 2016 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2017/4/28
Y1 - 2017/4/28
N2 - A simplified filterless frequency octupling scheme by connecting an intensity modulator (IM) with a dual-parallel Mach–Zehnder (DPMZM) in series is proposed in this paper. The LO signal is distributed into two parts, and one part is used to drive the IM and the other part is applied to drive the DPMZM’s upper sub-modulator, both at the peak point. The lower sub-modulator is only driven by dc bias, and the parent modulator works at null point. By properly adjusting dc bias of the lower sub-modulator, only ±4th-order optical sidebands dominate at the output of the DPMZM. The approach is verified by experiments, and 32-GHz and 40-GHz millimetre waves (mm-waves) are generated using 4-GHz and 5-GHz LO signals, respectively. We acquire a 15-dB electrical spurious suppression ratio (ESSR) and a relatively good phase noise of the signal. Compared with other schemes, the scheme is simple in configuration because only an IM and a DPMZM are needed. What’s more, the scheme is tunable in frequency as no filter is used.
AB - A simplified filterless frequency octupling scheme by connecting an intensity modulator (IM) with a dual-parallel Mach–Zehnder (DPMZM) in series is proposed in this paper. The LO signal is distributed into two parts, and one part is used to drive the IM and the other part is applied to drive the DPMZM’s upper sub-modulator, both at the peak point. The lower sub-modulator is only driven by dc bias, and the parent modulator works at null point. By properly adjusting dc bias of the lower sub-modulator, only ±4th-order optical sidebands dominate at the output of the DPMZM. The approach is verified by experiments, and 32-GHz and 40-GHz millimetre waves (mm-waves) are generated using 4-GHz and 5-GHz LO signals, respectively. We acquire a 15-dB electrical spurious suppression ratio (ESSR) and a relatively good phase noise of the signal. Compared with other schemes, the scheme is simple in configuration because only an IM and a DPMZM are needed. What’s more, the scheme is tunable in frequency as no filter is used.
KW - Cascaded modulators
KW - frequency octupling
KW - frequency tunability
KW - phase noise
KW - photonic microwave generation
UR - http://www.scopus.com/inward/record.url?scp=84997787304&partnerID=8YFLogxK
U2 - 10.1080/09500340.2016.1262917
DO - 10.1080/09500340.2016.1262917
M3 - 文章
AN - SCOPUS:84997787304
SN - 0950-0340
VL - 64
SP - 861
EP - 865
JO - Journal of Modern Optics
JF - Journal of Modern Optics
IS - 8
ER -