Ultraflattened high negative chromatic dispersion over O+E+S+C+L+U bands of a microstructured optical fiber

• Published in: Optical engineering 2015-09, Vol.54 (9), p.097105-097105
• Main Authors: Mahmud, Russel Reza, Razzak, S. M. Abdur, Hasan, Md. Imran, Hasanuzzaman, G. K. M
• Format: Article
• Language: English
• ISSN: 0091-3286; 1560-2303
• DOI: 10.1117/1.OE.54.9.097105

This paper presents a large negative flattened dispersion with high birefringence for a very wide wavelength range by designing a new high index lead silicate (SF57) soft glass equiangular decagonal spiral microstructured optical fiber (DS-MOF). The bandwidth supports the second and third windows covering the O+E+S+C+L+U bands in the infrared region. The guiding properties of the DS-MOF are investigated by the finite-element method with a perfectly matched layer boundary. The proposed design is a suitable candidate for the application of residual dispersion compensation with maintaining polarization characteristics since it offers a high negative flattened dispersion of −(453±7)  ps⋅nm−1 km−1 with a high birefringence of the order 10−2 for the wide wavelength range of 1.15 to 1.75  μm. The DS-MOF has some circular air holes that make the fabrication process simple. In addition, the effects of changing the structural parameters by up to ±4% are also analyzed to ensure the accuracy during the fabrication process.