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锗酸铋（ＢＧＯ）晶体属立方晶系，在０３６μｍ波段有良好的透过率，无自然双折射和旋光性，具有良好的光学性能。用ＢＧＯ晶体制得的声光调制器的性能：中心频率８０ＭＨｚ，３分贝带宽１２ＫＨｚ，对于驻波型器件，在１Ｗ驱动功率下，零级调制效率可达５７％（６３３ｎｍ）。除声光效应外，ＢＧＯ同时具有电光、磁光、光折变和激光等光电子性能。讨论了在ＢＧＯ声光效应的基础上发展新颖复合功能器件如声光调Ｑ／激光、声光锁模／激光的可能性。
Bismuth germanate (BGO) crystal cubic system, in the 0 3 6μm band has a good transmittance, no natural birefringence and optical activity, with good optical properties. The performance of the acousto-optic modulator made with BGO crystal is: 80MHz center frequency, 12KHz with 3 dB bandwidth. For 1W drive power, the zero-order modulation efficiency can reach 57% (633nm) for VSWR devices. In addition to the acousto-optic effect, BGO also has electrooptic, magneto-optical, photorefractive and laser optoelectronic properties. The possibility of developing new composite functional devices such as acousto-optic Q / laser, acousto-optic mode-locked / laser based on the BGO acousto-optic effect is discussed.