A new idea of linked Voigt anomalous dispersion optical filter (VADOF) is prenserted. Its transmission spectrum is analyzed and calculated. The result shows that, compared with VADOF, the linked VADOF changes the multi-peak configuration of VADOF into single-peak one and has narrower bandwidth and higher noise rejection ratio. The linked VADOF is applied into a new laser frequency-locking scheme, which improves the stability of laser frequency. Consequently, a novel inter-satellite laser link system using linked VADOF for frequency locking in the transmitter and Faraday anomalous dispersion optical (FADOF) for radiation rejection in the receiver is given. The result of field test demonstrates that this novel system is feasible.