A Simple Technique for Triangular Waveform Generation Based on a Dual-Polarization Modulator

作者：Albert Chirappanath B; Huang Chongjia; Chan Erwin H W^*

来源：IEEE Photonics Journal, 2018, 10(4): 7202709.

DOI：10.1109/JPHOT.2018.2844778

• Fiber optics communications
• radio frequency photonics
• waveform generation
• triangular pulses

A new microwave photonic topology for generating a triangular waveform is presented. The concept is based on incoherent summation of two intensity modulated optical signals to generate the first- and third-order harmonic frequency components with the same amplitude and phase as that of an ideal triangular waveform. The proposed triangular waveform generator has a very simple and low-cost structure as it only requires the Mach Zehnder modulator in a conventional fiber optic link to be replaced by an integrated dual-polarization modulator driven by two 90 degrees phase difference RF signals. It also has a widely tunable repetition rate, low insertion loss, and a stable performance. Experimental results demonstrate a triangular waveform with a tunable microwave-frequency repetition rate and a root mean square error value of < 0.049 when comparing with an ideal triangular waveform. The stability of the proposed triangular waveform generator is also examined experimentally.

• 出版日期2018-8