Femtosecond pulsed laser ablation of polyimide at oblique angles for medical applications

被引：12

作者：

Haq, Bibi Safia ^{[1
,2
]}

Khan, Hidayat Ullah ^{[3
]}

Alam, Khan ^{[3
]}

Mateenullah, Mian ^{[3
]}

Attaullah, Shehnaz ^{[4
]}

Zari, Islam ^{[5
]}

机构：

[1] Univ Peshawar, Jinnah Coll Women, Peshawar 25120, Pakistan

[2] Univ Hull, Dept Math & Phys, Kingston Upon Hull HU6 7RX, N Humberside, England

[3] Univ Peshawar, Dept Phys, Peshawar 25120, Pakistan

[4] Univ Peshawar, Jinnah Coll Women, Dept Chem, Peshawar 25120, Pakistan

[5] Univ Peshawar, Jinnah Coll Women, Dept Math, Peshawar 25120, Pakistan

来源：

APPLIED OPTICS | 2015年 / 54卷 / 24期

关键词：

POLYMER-FILMS; COPPER-FILMS; PICOSECOND;

D O I：

10.1364/AO.54.007413

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the ablation results for surface modification of polyimide Kapton HN foils using ultrashort femtosecond laser pulses. The modification threshold fluences for 75 mu m thick films of polyimide were determined at different incident angles (0 degrees, 20 degrees, 30 degrees, 45 degrees, and 50 degrees) for vertical and horizontal diameters. Ablation at oblique angles was investigated as such interactions are found during laser procedures with the eye that require scanning of the beam and are very important to know for the treatment of various eye diseases. Polyimide, in this study, was considered as a model for corneal sculpting. Use of ultrashort femtosecond laser pulses for high-precision patterning of the sample, without thermal damage to the surroundings, has been investigated. The relationship between the incidence angle with ablation threshold fluence, threshold energy, and beam radius are described. Also, threshold energies and threshold fluences for different thicknesses of polyimide were investigated. (C) 2015 Optical Society of America

引用

页码：7413 / 7418

页数：6

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