摘要
在相干光通信中,激光器的频率稳定性是相当重要的,压缩光源的频率噪声不仅可以降低通信的误码率,而且能够增大系统的安全传输距离,以此提高通信质量。而且在其它领域低频率噪声光源也应用广泛。将正弦调制信号加载到激光器电流调制端口进行波长调制,以乙炔气体的吸收线作为频率参考将激光器频率锁定在乙炔吸收线上,利用单光子波长调制技术实现对DFB激光器的频率锁定。
In the coherent optical communication,the frequency stability of laser is very important.The frequency noise of compressed light source can not only reduce the bit error rate of communication,but also increase the secure transmission distance of the system so as to improve the communication quality.Moreover,low-frequency noise light source is also widely used in other fields.The sinusoidal modulation signal is loaded into the current modulation port of the laser for wavelength modulation,and the frequency of the laser is locked on the acetylene absorption line by using the absorption line of acetylene gas as the frequency reference.The single photon wavelength modulation technique is used to realize the frequency locking of DFB laser.
作者
闫世平
YAN Shiping(Department of Physics,Xinzhou Teachers University,Xinzhou 034000,China)
出处
《大学物理实验》
2020年第2期76-78,共3页
Physical Experiment of College
基金
忻州师范学院院级教学改革创新项目[JG201726]。
关键词
激光器
频率噪声
调制解调
噪声抑制
lasers
frequency noise
modulation and demodulation
noise compression
