激光与红外
激光與紅外
격광여홍외
LASER & INFRARED
2014年
9期
972-976
,共5页
黄灵鹭%何宁%冯太琴%何志毅
黃靈鷺%何寧%馮太琴%何誌毅
황령로%하저%풍태금%하지의
激光致声%海气信道%水声通信%基频可调 ASK 编码
激光緻聲%海氣信道%水聲通信%基頻可調 ASK 編碼
격광치성%해기신도%수성통신%기빈가조 ASK 편마
laser acoustic%air-sea transmission channel%acoustic communication%frequency adjustable ASK code modulation
构建1.064μm 脉冲激光致声水声通信系统，依据激光致声机理，研究激光脉冲能量与声能量关系，分析水下致声信号特征和传输特性，针对水下噪声信号与致声信号的频谱特性，采用滤波方法从频域进行了有效分离。通过理论分析和实验验证，结果表明声波转换能量与激光脉冲能量成正比，选择不同的光学结构可获得不同的致声能量，采用基频可调的 ASK编码方式可实现数字信息的有效传送，为海洋通信提供新的技术途径。
構建1.064μm 脈遲激光緻聲水聲通信繫統，依據激光緻聲機理，研究激光脈遲能量與聲能量關繫，分析水下緻聲信號特徵和傳輸特性，針對水下譟聲信號與緻聲信號的頻譜特性，採用濾波方法從頻域進行瞭有效分離。通過理論分析和實驗驗證，結果錶明聲波轉換能量與激光脈遲能量成正比，選擇不同的光學結構可穫得不同的緻聲能量，採用基頻可調的 ASK編碼方式可實現數字信息的有效傳送，為海洋通信提供新的技術途徑。
구건1.064μm 맥충격광치성수성통신계통，의거격광치성궤리，연구격광맥충능량여성능량관계，분석수하치성신호특정화전수특성，침대수하조성신호여치성신호적빈보특성，채용려파방법종빈역진행료유효분리。통과이론분석화실험험증，결과표명성파전환능량여격광맥충능량성정비，선택불동적광학결구가획득불동적치성능량，채용기빈가조적 ASK편마방식가실현수자신식적유효전송，위해양통신제공신적기술도경。
An underwater acoustic communication system of 1.064 μm pulse laser is established.According to the mechanism of laser acoustic,the relationship between the laser pulse energy and the acoustic energy is studied,and the characteristics of laser acoustic signal and transmission under water are analyzed.Aiming at the spectrum charac-teristics of noise signal and laser acoustic signal,filtering method is used for effective signal separation in frequency domain.Theoretical analysis and experimental results show that acoustic energy increases with the increase of laser pulse energy,and different optical structures can obtain different acoustic energy.Frequency adjustable ASK code modulation can realize the effective transmission of digital information,which provides a new technical method for ma-rine communications.
