A novel scheme for ultra-wideband (UWB) monocycle pulse generation is proposed based on a dual-output push-pull Mach-Zehnder modulator (MZM). The MZM is driven by a non-return-to-zero (NRZ) data sequence and biased at the nonlinear point to generate edge-triggered pulses. To combine the complementary pulses forming a monocycle UWB pulse, two schemes are used to implement incoherent summation structure. A proof-of-concept experiment of UWB-over-fiber down-link system is set up. Further, by using digital signal processing (DSP) to calculate the bit error rate (BER), the transmission performance of two system configurations is studied.
© 2010 Chinese Optics Letters
(060.2330) Fiber optics and optical communications : Fiber optics communications
(320.5540) Ultrafast optics : Pulse shaping
(060.5625) Fiber optics and optical communications : Radio frequency photonics
Ying Zhao, Xiaoping Zheng, Hanyi Zhang, and Bingkun Zhou, "UWB-over-Fiber transmission system using a dual-output Mach-Zehnder modulator," Chin. Opt. Lett. 8, 454-456 (2010)