Method for generating ultra-wideband pulse of arbitrary waveform

Abstract

The invention discloses a time domain lens compression system based method for generating ultra-wideband pulse of arbitrary waveform. The method comprises the following steps: generating a wideband time domain pulse signal in a frequency domain by using an arbitrary waveform generator (AWG); respectively generating a positive amplitude part and a negative amplitude part of the wideband time domain pulse signal by using two output ports of the AWG; respectively modulating the positive amplitude part and the negative amplitude part into an optical pulse signal; compressing the two optical pulsesignals by using a time domain lens system; and detecting one compressed optical pulse signal with the other optical pulse signal by a differential photoelectric detector after one compressed opticalpulse signal is subjected to optical delay so as to acquire the ultra-wideband pulse signal. By using the time domain lens compression system, the method can flexibly and conveniently generate a narrow pulse signal with an arbitrary waveform, can effectively overcome the encountered difficulty in generating narrow pulse in the frequency domain, contributes to confusion with the optical fiber communication technology, and plays an important role in communication systems, radar systems, the sensor technology and other scientific fields as an implementation scheme of an optical AWG.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology and optical fiber communication technology, and relates to a method for generating an arbitrary waveform UWB pulse in an optical-carrying ultra-wideband (UWB) system, a pulse radar system and an optical fiber wireless communication system. Background technique [0002] Since the 1970s, Ultra Wide Band (UWB) technology has been widely used in radar, sensing and military communications. As the U.S. Federal Communications Commission (FCC) stipulated that UWB technology can be used in civil communications in 2002, UWB systems can access and share a total of 7.5GHz of bandwidth between 3.1 and 10.6GHz. aroused widespread concern. At present, UWB pulse signals generated in the frequency domain generally have a relatively narrow bandwidth and low efficiency. In order to improve the spectrum utilization of UWB pulses, it is necessary to reasonably design the waveform of UWB pulses. However, the ...

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Problems solved by technology

At present, the methods of generating UWB pulses with arbitrary waveforms mainly use fiber gratings, highly nonlinear fibers or spatial light modulators, which are realized by spectrum shaping and dispersion delay or pulse superposition, but the control of UWB pulses generated by this method is complicated and not flexible enough , it is not easy to encode and modulate it at the same time

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