Opt Lett. 2023 Feb 15;48(4):1040-1043. doi: 10.1364/OL.479902.
UV-illuminated, paraelectric-phased potassium tantalate niobate (KTN) single crystals mitigate the beam deformation effects of femtosecond pulsed lasers in KTN deflectors. UV light illumination can control the amount of trapped charge present and minimize domain inversion in KTN deflectors, owing to its generated electron-hole pairs. This enables high beam quality deflection of fs pulsed lasers, with access to larger deflection angles, deflection speeds, and modulation switching ratios. These results enable the use of KTN deflectors in many fs pulsed laser applications and hasten the advancement of fs applications that require these deflection qualities.
紫外光照射下，弛豫铁电相铌酸钾钽酸钾（KTN）单晶体可减轻飞秒脉冲激光在 KTN 偏转器中的光束变形效应。紫外光照射由于其产生的电子-空穴对，可以控制存在的俘获电荷的数量，并最小化 KTN 偏转器中的畴反转。这使得 fs 脉冲激光能够以更大的偏转角度、偏转速度和调制切换比进行高质量光束偏转。这些结果使得 KTN 偏转器能够在许多 fs 脉冲激光应用中使用，并加速了需要这些偏转质量的 fs 应用的发展。
