Reflecting volume Bragg grating (R-VBG) as a key component of external cavity laser can realize the wavelength stabilization and linewidth narrowing for high-power diode lasers, causing the highly matching between the laser wavelength and the absorption peak of gain medium and improving the photoelectric conversion efficiency and running stability. R-VBG is widely used in high power fiber lasers, solid lasers, and gas lasers.The high-performance multi-wavelength R-VBG can be mass produced. In order to achieve the optimized matching between R-VBG and diode laser, the wavelength center, S-bandwidth, diffraction efficiency, and size of R-VBG can be customized to meet the need of customers.