利用可调谐激光器产生可调谐的连续波光载信号  

Frequency-modulated continuous-wave radio-over-fiber signal generation based on wavelength tunable laser

作　　者：李林[1] 陈彪[1] 

机构地区：[1]浙江大学光电科学与工程学院现代光学仪器国家重点实验室,浙江杭州310027

出　　处：《光电子．激光》2017年第6期591-595,共5页Journal of Optoelectronics·Laser

摘　　要：针对采用传统的电子器件的调频/连续波(FM/CW)产生方法由于带宽限制无法达到较高分辨率的问题,提出一种基于增益开关可调谐半导体激光器(TLD)产生高频FM/CW信号的方案,具有中心频率和波长双重可调谐性、结构简单和易于扩展的特点与优势。本文方案可用于基于光纤无线电(ROF,radio-over-fiber)技术的多雷达头分布系统,可方便实现多通道切换。实验中,通过2GHz的调制信号,实现了10倍频20GHz的信号产生以及中心频率为10GHz、带宽为500 MHz的调频连续波信号产生。The traditional frequency-modulated signal generation using only electronics cannot achieve high resolution because of the narrow bandwidth. On the other hand, because of the significant atmos- pheric attenuation, a large number of radar heads must be installed in a millimeter radar system for sur- veying a large area. So a distributed radar system is needed to deliver a highly accurate signal from the central office in order to save cost. In this paper, an approach of frequency-modulated continuous-wave （FM-CW） signal generation based on gain-switching wavelength tunable semiconductor laser is pro- posed. It is easy to be extended and is tunable for both the central frequency and the wavelength. Multi- radar head distribution system, capable of multi-channel switching, can be achieved with this approach by using radio-over-fiber technology. In our experiment,a CW signal with frequency of 20 GHz and a FM- CW signal with bandwidth of 500 MHz and central frequency of 10 GHz can be achieved. The experi- mental results comfirm the feasibility of our approach for millimeter wave FW-CW signal generation.

关 键 词：光学方法产生微波信号 光纤无线电(ROF) 调频/连续波(FM/CW) 可调谐半导体激光 器(TLD) 

分 类 号：TN248.4[电子电信—物理电子学]