光热折变玻璃在紫外波段具有较好的光敏特性，并且在近红外和可见光波段具有很高的透射率,用它制作的体布喇格光栅能够承受高能激光辐照，因而特别适合应用于高功率激光技术中。综述了基于体布喇格光栅的光纤激光谱组束技术最新研究进展；阐述了体布喇格光栅的基本理论，分别介绍了基于单体光栅、级联体光栅和3维层叠复合体光栅的谱组束、共腔谱组束以及混合组束5种组束方案的组束原理和研究进展，最后对各组束方案中存在的问题进行了讨论。

Because photo-thermo-refractive(PTR) glass has high photo-sensitivity in the UV band, and high transmittance in the near-IR band, volume Bragg gratings(VBGs)recorded in PTR glass are widely used in high-power lasers. Recent progress of spectral beam combination of fiber lasers based on VBGs was reviewed. The theory of VBGs recorded in PTR glass and the basic principle of five kinds of spectral beam combination schemes were introduced, including spectral beam combination based on single VBG ,cascaded VBGs and multiplexed VBGs, common-cavity spectral beam combination and coherent and spectral beam combination based on VBGs. The advantages and disadvantages of these schemes were analyzed. At last, the problems of each beam combination were discussed.