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All-fiber 80-Gbit/s wavelength converter using 1-m-long Bismuth Oxide-based nonlinear optical fiber with a nonlinearity γ of 1100 W-1km-1

Ju Han Lee, Kazuro Kikuchi, Tatsuo Nagashima, Tomoharu Hasegawa, Seiki Ohara, and Naoki Sugimoto

Open Access Open Access

Abstract

We experimentally demonstrate the use of our fabricated 1-mlong Bi2O3 optical fiber (Bi-NLF) with an ultra-high nonlinearity of ~1100 W-1km-1 for wavelength conversion of OTDM signals. With successfully-performed fusion splicing of the Bi-NLF to conventional silica fibers an all-fiber wavelength converter is readily implemented by use of a conventional Kerr shutter configuration. Owing to the extremely short fiber length, no additional scheme was employed for suppression of signal polarization fluctuation induced by local birefringence fluctuation, which is usually observed in a long-fiber Kerr shutter. The wavelength converter, composed of the 1-m Bi-NLF readily achieves error-free wavelength conversion of an 80-Gbit/s input signal

©2005 Optical Society of America

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Figures (5)
Fig. 1.
Fig. 1. (a) Measured optical spectrum for nonlinear four-wave mixing in the Bi-NLF fabricated. (b) Measured nonlinear phase shift versus input signal power (The dashed line is a linear fit).

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Fig. 2.
Fig. 2. Experimental setup for the 80-Gbit/s wavelength converter using a 1-m-long Bi-NLF.

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Fig. 3.
Fig. 3. Measured output optical spectrum after the polarizer together with that after the filter.

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Fig. 4.
Fig. 4. (a) Measured autocorrelation traces of the 1555-nm original data pulses and the 1545-nm wavelength-converted pulses. (b) Measured temporal width of the wavelength-converted pulses as a function of probe beam wavelength.

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Fig. 5.
Fig. 5. (a) Measured eye diagrams for the 80-Gbit/s input control and the 80-Gbit/s wavelength-converted signals together with those of the 10-Gbit/s back-to-back and the 10-Gbit/s demultiplexed signals (input pulses: 1555 nm, wavelength-converted pulses: 1545nm). (b) Measured BER’s for the 80-to-10-Gbit/s demultiplexed wavelength-converted signal and the 10-Gbit/s back-to-back signal.

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