The design and fabrication for a loop optical circulator was proposed,which can take two forms with different optical arrangements.Its working priciple and optical performance are analyzed by theoretical simulation,and the effectiveness was validated by experimental results.Results indicate that the scheme can make device more compact only using one stage of Faraday Rotator (FR).Compared with traditional circulators,the optical performance is similar to a circulator with two stage of FRs.This compact design can also reduce the cost for the device and ease the assembling process.