An optical modulator that provides broadband phase modulation of microwave subcarriers directly in the photonic domain has been proposed. This modulator, which involves no millimeter-wave device, can provide a dispersion-tolerant output signal with arbitrary phase shift. Therefore it has wide applications in high-frequency radio over fiber systems employing complex constellation modulation. Simulations and a proof-of-concept experiment demonstrate the feasibility of the modulator.
© 2006 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: June 20, 2006
Revised Manuscript: August 22, 2006
Manuscript Accepted: September 12, 2006
Published: October 26, 2006
Yiqiao Song, Xiaoping Zheng, Weinan Wang, Hanyi Zhang, and Bingkun Zhou, "All-optical broadband phase modulation of a subcarrier in a radio over fiber system," Opt. Lett. 31, 3234-3236 (2006)