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针对现阶段光电对抗单波长激光干扰的局限性,提出了干扰激光双波长复合输出方案,为军用光电对抗设备的通用化和小型化提供了有效思路。利用稳态和速率方程理论分别建立了连续和脉冲激光复合输出模型,通过数值仿真探究了倍频晶体长度和腔镜基频透射率对复合激光输出功率成分的影响。在连续输出状态下,存在最佳基频透射率使基频输出功率最高;对于两种输出状态,都存在最佳倍频晶体长度使倍频输出功率最高。通过实验验证了连续和脉冲输出状态下复合激光输出功率成分随腔镜基频透过率的变化关系,并进一步探究了重复频率对复合激光输出的影响。
In view of the limitation of photoelectric countermeasure against single wavelength laser interference at the present stage, a dual wavelength compound output scheme of interference laser is proposed, which provides an effective way for the generalization and miniaturization of military optoelectronic countermeasure equipment. The steady-state and rate-equation theory are used to establish the continuous and pulsed laser output model respectively. The effects of the frequency of double-frequency crystal and the fundamental-frequency transmittance of the laser on the output power of the composite laser are investigated by numerical simulation. In the continuous output state, there is an optimum fundamental frequency transmissivity to maximize the fundamental output power; for both output states, there is an optimum octave crystal length to maximize the octave output power. The experimental results show that the output power of the composite laser varies with the fundamental frequency of the lasers and the influence of the repetition frequency on the output of the composite lasers is further verified.