Flexible Multi-band Dual-chirped Microwave Waveforms Generation with Double Bandwidth

IF 2.3 4区物理与天体物理 Q2 OPTICS

Fiber and Integrated Optics Pub Date : 2021-11-02 DOI:10.1080/01468030.2021.2014606

H. Zhang, J. Ma, Junyi Zhang

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引用次数: 0

Abstract

ABSTRACT A multi-band dual-chirp linearly frequency modulated (LFM) signal-generation scheme with doubled chirp bandwidth and flexible center frequency and band numbers is proposed. In the scheme, the polarization multiplexed multi-tone optical signals with chirped phases are generated via a dual-polarization dual-parallel Mach–Zehnder modulator (DPMZM) cascaded with a polarization modulator. The two polarization multiplexed lightwaves are recombined as two linearly polarized beams by a polarization beam splitter and are detected by a balanced photodiode with a photocurrent that includes the multi-band dual-chirp LFM signal with doubled bandwidth and multiplied central frequencies but does not have a dc component. Since the orders and numbers of the generated optical sidebands are changed by adjusting the bias voltages of a DPMZM, we can obtain the multi-band dual-chirp LFM signal flexibly. Based on simulation, four-band, six-band and two seven-band dual-chirp LFM signals are generated with four groups of bias voltage configurations. For each case, every dual-chirp LFM signal of the generated multi-band dual-chirp LFM signal has a 5-GHz bandwidth and a time-bandwidth product of 512. The auto-correlations and ambiguity function of the generated LFM signal show good performance of pulse compression and range-Doppler resolution.

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双带宽柔性多波段双啁啾微波波形生成

提出了一种具有双啁啾带宽、中心频率和频带数灵活的多频带双啁啾线性调频(LFM)信号生成方案。该方案通过与偏振调制器级联的双偏振双平行马赫-曾德尔调制器(DPMZM)产生具有啁啾相位的偏振复用多音光信号。通过偏振分束器将两个偏振复用光波重新组合为两个线偏振光束，并由具有光电流的平衡光电二极管检测，该光电流包括具有双倍带宽和倍增中心频率的多频带双啁啾LFM信号，但不具有直流分量。由于可以通过调整DPMZM的偏置电压来改变产生的光边带的阶数和个数，因此可以灵活地获得多波段双啁啾LFM信号。仿真结果表明，在四组偏置电压配置下，产生了四带、六带和两个七带双啁啾LFM信号。在每种情况下，生成的多频段双啁啾LFM信号的每个双啁啾LFM信号的带宽为5ghz，时间带宽积为512。生成的LFM信号的自相关和模糊函数具有良好的脉冲压缩性能和距离-多普勒分辨率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fiber and Integrated Optics 物理-光学

CiteScore

3.40

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Fiber and Integrated Optics , now incorporating the International Journal of Optoelectronics, is an international bimonthly journal that disseminates significant developments and in-depth surveys in the fields of fiber and integrated optics. The journal is unique in bridging the major disciplines relevant to optical fibers and electro-optical devices. This results in a balanced presentation of basic research, systems applications, and economics. For more than a decade, Fiber and Integrated Optics has been a valuable forum for scientists, engineers, manufacturers, and the business community to exchange and discuss techno-economic advances in the field.