High-speed microwave photonic switch for millimeter-wave ultra-wideband signal generation

et al. 2014

IEEE Photonics J.

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We report a new photonic microwave pulse generator using a phasemodulator-based Sagnac interferometer (PM-SI) and wavelength-to-time mapping in a dispersive element. The key significance of the proposed scheme is that the phase of the generated microwave pulse can be continuously tuned by adjusting the bias voltage applied to the PM. Thanks to the wide bandwidth of the PM, high-speed phase modulation of the microwave pulse can be realized. Moreover, the PM-SI is polarization independent, which means that the PM-SI is insensitive to the state of polarization of the input optical signal, ensuring a stable operation of the system. The proposed scheme is theoretically analyzed and experimentally verified.

Section: Introductionmentioning

confidence: 99%

Photonic Generation of Microwave Pulse Using a Phase-Modulator-Based Sagnac Interferometer and Wavelength-to-Time Mapping

et al. 2014

IEEE Photonics J.

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“…To overcome the drawback, several schemes have been proposed to generate background-free MMW-UWB signals. An UWB signal without low frequency components and a residual local oscillator was generated by using a polarization modulation based high-speed microwave photonic switch [11,12]. To simplify the signal generation system and improve the stability, a background-free MMW-UWB signal generation scheme using a DP-MZM was proposed, in which a 25 GHz MMW-UWB signal was generated [13].…”

Section: Introductionmentioning

confidence: 99%

Photonic millimeter-wave-band ultra-wideband signal generation based on a dual-drive Mach-Zehnder modulator

9th International Conference on Communications and Networking in China

Dai

Ren

et al. 2014

A novel millimeter-wave (MMW) band ultra-wideband (UWB) signal generation scheme is proposed in this paper. A theoretical model is built to demonstrate the signal generation and to analyze the signal quality. The mechanism to suppress the residual local oscillation and low frequency components is investigated. The influence of the input signal over the bandwidth is studied. A 24 GHz-band MMW-UWB signal with the bandwidth of 8.1 GHz is generated at 25.5 GHz.

“…We focus on the generation of UWB signals using photonic method in this work. So far, photonic generation of UWB signals has been proposed based on various methods [4]- [17]. For CMW UWB generation, cross gain or cross phase modulation in semiconductor optical amplifier (SOA) [4], [5], phase-to-intensity modulation conversion [2], and four-wave mixing in highly nonlinear fiber have been exploited [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Photonic Generation of Ultrawideband Signals With Large Carrier Frequency Tunability Based on an Optical Carrier Phase-Shifting Method

Zheng

et al. 2013

IEEE Photonics J.

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We theoretically and experimentally demonstrated a novel photonic approach to generating ultrawideband (UWB) pulses with large carrier frequency tunability based on an optical carrier phase-shifting technique by cascading polarization modulators (PolMs) and a polarizer. The UWB pulses are generated by truncating a continuous wave (CW) RF signal into a pulsed signal in a photodetector (PD). The experimental results show that the baseband frequency components and the strong residual local oscillator (LO) signal are well suppressed. In addition, the generated UWB signals satisfy the Federal Communications Commission (FCC) spectral mask very well.