研究了中心对称光折变晶体中Kagome光子晶格内带隙孤子的存在及其稳定性。结果表明:带隙孤子只存在于半无限带隙内,中功率的带隙孤子是稳定的,高功率和低功率的带隙孤子是不稳定的。在高功率和中功率区域内,带隙孤子的功率随传播常数的增加而减小。在低功率区域内,带隙孤子的功率随传播常数的增加而变大。 The existence and stability of band gap solitons in the Kagome photonic crystal lattice in a centrosymmetric photorefractive crystal were investigated. The results show that the band - gap soliton exists only in the semi - infinite band gap, the medium - power band - gap soliton is stable, and the band gap solitons with high power and low power are unstable. In the high-power and mid-power regions, the power of the band gap soliton decreases with increasing propagation constant. In the low power region, the power of the band gap soliton becomes larger as the propagation constant increases.