Ultra broadband-flattened dispersion photonic crystal fiber for supercontinuum generation

• 来源期刊: 中国光学快报(英文版)
• 学科: 工学
• 关键词: 光子晶体光纤 平坦色散 超宽带 改进设计 波长范围 创新基金 非线性系数 超连续光谱
• 年，卷（期）: 2010,（11）
• 页码范围: 1028-1031
• 页数: 4页
• 分类号: TN253 TN92
• 语种: 英文

摘要

We propose an improved design of photonic crystal fiber (PCF) with ultra broadband-flattened dispersion and ultra-low confinement loss in the telecommunication window.The design is considerably suitable for the generation of wideband supercontinuum spectrum.Numerical results reveal that the proposed PCF structure possesses a low dispersion of 0±1.5 ps/(nm·km) in the wavelengths ranging from 1.134 to 1.805 μm (approximately 700-nm bandwidth) with a confinement loss of less than 10 8 dB/km.In addition,a nonlinear coefficient greater than 11.47 (W·km) 1 and a dispersion slope of as low as 0.005694 ps/(nm 2 ·km) are obtained at 1.55-μm wavelength.Moreover,a symmetric flat supercontinuum spectrum with a 10-dB bandwidth of 190 nm is achieved in a 3-m-long fiber,verifying the excellent optical features of the innovative PCF.