Acousto-optic tunable filter（ AOTF） is the fifth generation of spectroscopic system core component. In AOTF near-infrared（ NIR） spectrometer system. Stable RF driven signal source is a key issue in research and development of AOTF NIR Spectrometer system. Based on wavelength range of near infrared spectroscopy

The system uses SCM to drive DDS and designs output frequency range at 80

150 MHz. The system includes a singlechip control module

DDS signal generator module

filter circuit

power amplifier module. Test results show that in the desired output frequency range

the system can output the desired waveform and output signal frequency relative error within 0. 45 %

with power of 1W

corresponding to the output wavelength range of 900

1 700 nm.