An effective optoelectronic mixing (OEM) method based on bulk potassium tantalate niobate (KTN) crystal was proposed. The optical isotropy of the cubic phase rendered KTN insensitive to the incident angles of collected beams. Consequently, effective electro-optic (EO) modulation could be realized under a large incident range of 20°. The massive quadratic EO coefficient of 3.7 × 10⁻¹⁵ m²/V² could effectively reduce local oscillation (LO) voltage, such that OEM could be achieved under low power consumption. On the basis of the above advantages, a mixing efficiency model for KTN mixer was proposed to describe mixing characteristics. Simultaneously, a mixing efficiency of 44% within the 20° incident range was achieved at a power consumed for each pixel of 230 μW.

提出了一种基于块状钽酸铌酸钾 (KTN) 晶体的有效光电混合 (OEM) 方法。立方相的光学各向同性使 KTN 对收集光束的入射角不敏感。因此，可以在 20° 的大入射角下实现有效的电光 (EO) 调制。3.7 × 10 ^-15 m ² /V ²的大规模二次电光系数可以有效降低本地振荡（LO）电压，从而可以在低功耗下实现OEM。基于上述优点，提出了KTN混合器的混合效率模型来描述混合特性。同时，在每个像素消耗的功率为 230 μW 的情况下，在 20° 入射范围内实现了 44% 的混合效率。