We present an analytical procedure to compute the first derivatives of the propagation constants with respect to several structural parameters in photonic crystal fibers (PCFs). From them we can easily evaluate the same derivatives of other directly related magnitudes. The above derivatives provide the trend of the magnitude at issue, which allows us to take advantage of a gradient-based algorithm to shape the properties of the guiding structure. In this way we implement an optimization process to carry out real inverse design in PCFs. We focus our attention on designing PCFs with a specific chromatic dispersion behavior. Likewise, the same approach makes it possible to analyze their fabrication tolerances.
© 2006 Optical Society of America
Fiber Optics and Optical Communications
Original Manuscript: November 4, 2005
Manuscript Accepted: January 25, 2006
Enrique Silvestre, Teresa Pinheiro-Ortega, Pedro Andrés, Juan J. Miret, and Ángela Coves, "Differential toolbox to shape dispersion behavior in photonic crystal fibers," Opt. Lett. 31, 1190-1192 (2006)