Author Affiliations
Abstract
1 Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Technical Science of Ministry of Education, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
2 FEMTO-ST Institute, Université de Bourgogne-Franche-Comté UMR-6174, 25030 Besançon, France
In the femtosecond two-photon polymerization (2PP) experimental system, optical aberrations degrade the fabrication quality. To solve this issue, a multichannel interferometric wavefront sensing technique is adopted in the adaptive laser processing system with a single phase-only spatial light modulator. 2PP fabrications using corrected high-order Bessel beams with the above solution have been conducted, and high-quality microstructure arrays of microtubes with 20 µm diameter have been rapidly manufactured. The effectiveness of the proposed scheme is demonstrated by comparing the beam intensity distributions and 2PP results before and after aberration corrections.
femtosecond laser two-photon polymerization aberration correction Bessel beams Chinese Optics Letters
2023, 21(7): 071203
1 天津大学精密仪器与光电子工程学院超快激光研究室/光电信息技术科学教育部重点实验室, 天津 300072
2 深圳大学光电子器件与系统教育部/广东省重点实验室, 广东 深圳 518060
3 深圳大学纳米光子学研究中心, 广东 深圳 518060
设计了一种相位函数,得到类贝塞尔光束中心主瓣尺寸随传播距离演化的解析公式,实现了类贝塞尔光束中心主瓣尺寸随轴向距离z的线性调控。通过实验,将所设计的相位函数加载到空间光调制器上,在直接空间中实现了类贝塞尔光束中心主瓣尺寸的精确调控,研究了不同传播长度下类贝塞尔光束中心主瓣尺寸的演化。实验结果与仿真结果一致,验证了该相位函数的可靠性,且在整个贝塞尔区间内,最高强度处的横向光强分布仍满足贝塞尔函数分布。
衍射 类贝塞尔光束 空间光调制器 中心主瓣尺寸
