利用相移光纤光栅中不同的相移量可以在光栅传输阻带中的不同位置打开透射窗口这一特性,给出了用光外差法将单一光源形成两个差频再经拍频后生成毫米波的方案。理论分析和数值计算结果表明,采用单个光源产生毫米波所引入的激光随机相位噪声低于双光源系统,能够产生波长稳定、相位噪声低、频率调整方便、耦合效果好的毫米波,可为光纤无线通信系统实际应用提供参考。 The use of phase-shift fiber grating in different phase shift amount can be transmitted in the grating stopband at different locations to open the transmission window of this feature is given by the heterodyne heterodyne single light source formed after the two beat frequency and beat frequency generated Millimeter wave program. The theoretical analysis and numerical results show that the laser produced by a single light source produces less laser phase noise than the dual light source system and can generate millimeter waves with stable wavelength, low phase noise, convenient frequency adjustment and good coupling effect. Wireless communication system for practical reference.