Abstract

We designed and configured a highly compact and tunable optical add–drop multiplexer (OADM) device that consists of long-period gratings (LPGs) and piezoelectric ceramic fiber stretchers. The modeling for the proposed OADM predicts that 50 International Telecommunication Union (ITU) dense wavelength-division multiplexing (DWDM) channel signals could be selected in the wavelength range from 1526.25 to 1563.75 nm with 0.75-nm channel spacing, which covers the whole C-band gain spectrum of an erbium-doped fiber amplifier (EDFA). The cross talk between channels is less than –39 dB, and the total insertion loss of the device is ~0.24 dB, which includes the splicing loss, the mode-mismatching loss, and the expected loss in the two side-by-side coupled fibers. We can tune add–drop channels within a limited region by changing the voltage, which is applied to the piezoelectric ceramic (PZT) fiber stretchers. This technique is suitable for the in-line implementation of optical communication networks.

© 2003 Optical Society of America

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