Abstract

With the development of the communication and radar systems, the demand for precisely processing broadband signal has become urgent. The basic functions of filtering and digitizing are often needed together in many applications such as antialiasing and interference suppression in digital receivers. To break the bottleneck of the traditional methods, a recently-proposed simultaneous photonic filtering and digitizing system[1] can achieve analog pre-filtering and digitizing at the same time, and its equivalent system response can be tuned by shaping the optical sampling pulses. However, limited by the dilemma between the precision and duration of the shaped pulses, the bandwidth of the signal processing are constraint. The design rules to achieve precise signal procession are analysed. An optical shaping scheme based on the interference and frequency-to-time mapping is utilized in the system[2], as shown in Fig. 1(a).

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