AOTF驱动器设计

The Design of AOTF Driver based on PLL

为提高声光可调谐滤光器(Acousto-optic tunable filter,缩写AOTF)分光性能,文中设计基于锁相环的AOTF驱动器。采用数字锁相环频率合成器产生射频驱动信号;设计了跳频电路部分以提高不同频率驱动信号间的切换速度;加入调制级,有效的减小了0级光噪声。

Aiming at how to improve the performance of the AOTF （Acousto-optic tunable filter） system, the design of AOTF driver based on PLL Frequency Synthesizer is presented in this paper. Digital PLL frequency synthesizer is applied to produce driving signals, and the frequency-hopping circuit is designed to improve switch speed between different frequency of driving signals. Furthermore, a chopper-type modulator is added, which effectively eliminates optical noise.