1.58-μm broad-band erbium-doped tellurite fiber amplifier

• Published in: Journal of lightwave technology Vol. 20; no. 5; pp. 822 - 827
• Main Authors: Mori, A., Sakamoto, T., Kobayashi, K., Shikano, K., Oikawa, K., Hoshino, K., Kanamori, T., Ohishi, Y., Shimizu, M.
• Format: Journal Article
• Language: English
• Published: 01.05.2002
• Subjects: Amplification; Amplifiers; Conversion; Cross sections; Excitation spectra; Fibers; Gain; Noise levels
• ISSN: 0733-8724
• DOI: 10.1109/JLT.2002.1007935

This paper describes the development of a 1.58- mu m broad-band and gain-flattened erbium-doped tellurite fiber amplifier (EDTFA). First, we compare the spectroscopic properties of various glasses including the stimulated emission cross sections of the Er super(3+4) I sub(13)2/ super(4)I sub(15)2/ transition and the signal excited-state absorption (ESA) cross sections of the Er super(3+4) I sub(13)2/ - super(4)I sub(9)2/ transition. We detail the amplification characteristics of a 1.58- mu m-band EDTFA designed for wavelength-division-multiplexing applications by comparing it with a 1.58- mu m-band erbium-doped silica fiber amplifier. Furthermore, we describe the 1.58- mu m-band gain-flattened EDTFA we developed using a fiber-Bragg-grating-type gain equalizer. We achieved a gain of 25.3 dB and a noise figure of less than 6 dB with a slight gain excursion of 0.6 dB over a wide wavelength range of 1561-1611 nm. The total output power of the EDTFA module was 20.4 dBm and its power conversion efficiency reached 32.8%.