Abstract
We present the fiber loss estimation, contour loss curves, and fiber loss spectra for the mode transmission in a Bragg fiber; numerical results are especially focused on the mode. A fiber loss of the order of 0.01– can be achieved using cladding material of in loss. The loss of the hollow core fiber is simply formulated in terms of the constituting cladding losses, fiber structural parameters, and operation wavelength under the quarter-wave stack (QWS) condition. It is effective for decreasing the loss of the cladding lower-index layer to get a low-loss Bragg fiber. The fiber loss is minimized at an optimum cladding lower-index . The can be expressed by , which is a function of cladding higher-index , core index , and cladding layer loss ratio for a sufficiently large value of normalized core radius, , under the QWS condition. The optimized fiber loss is inversely proportional to the product of and for a sufficiently large .
© 2007 Optical Society of America
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