The Doppler frequency shift, the main factor restricting the bandwidth of receiver in inter satellite laser link, with orbit equations is calculated. On the base of theoretical and experimental study in transmission and tunable characteristic of Faraday anomalous dispersion optical filter (FADOF), several novel schemes are proposed based on FADOF′s multi peak and tunable characteristic, to meet the acquisition requirements in different orbit positions. Typical bandwidth of filter is 0.01 nm～0.02 nm.