Experimental demonstration of narrow-band rugate minus filters using rapidly alternating deposition technology

• 来源期刊: 中国物理B（英文版）
• 关键词: rugate structure minus filter narrow-band laser-induced damage threshold (LIDT)
• 年，卷（期）: 2018,（5）
• 页码范围: 313-317
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/5/054217

摘要

The design,fabrication and performance of narrow-band rugate minus filters are investigated in this paper.A method of fabricating graded-index coatings by rapidly alternating deposition of low (SiO2) and high (A12O3) refractive index materials is presented to fabricate a rugate structure.The narrow-band rugate minus filter design and fabrication approaches are discussed in detail.The experimental results,including transmittance spectrum,surface damage test and damage morphology investigated with a scanning electron microscope,demonstrate the high performance of the as-fabricated spatial filter and confirm the feasibility of the fabrication method for narrow-band rugate minus filters.