15 February 1990 Erbium-Doped Fiber Amplifier And Its Application To Nonlinear Optics
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Abstract
Gain characteristics of an Er3+-doped fiber for high-power picosecond input pulses are studied with an InGaAsP laser diode pump source at 1.46-1.48 μm. The output energy and peak power of the amplified pulses reach as high as 7.9 pJ and 792 mW for a repetition rate of 100 MHz and a pulse width of 10 ps. The gain saturation is so slow that the gain in high speed pulse transmission systems is determined by a steady-state saturated gain. With the Er3±-doped fiber amplifier, it is shown that solitons can be amplified and transmitted over a long dispersion-shifted fiber by using the dynamic range of an N=1 soliton. Furthermore, optical solitons at wavelengths of 1.535 μm and 1.552 jim have been amplified and transmitted simultaneously over 30 km with an Er3±-doped fiber repeater for the first time. The collision experiments between these different wavelength solitons are described. It is shown that there is a saturation-induced cross talk between multi channel solitons, and the cross talk (the gain decrease) is determined by the average input power in high bit-rate transmission systems. Subpicosecond soliton and 20 GHz soliton pulse amplifications with Er3±-doped fiber are also described, which indicate that Er fibers are very advantageous for short pulse soliton communication. Finally, a gain coefficient as high as 2.4 dB/mW is reported using InGaAsP laser diodes.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Masataka Nakazawa, Masataka Nakazawa, Yasuo Kimura, Yasuo Kimura, Kazunori Suzuki, Kazunori Suzuki, Hirokazu Kubota, Hirokazu Kubota, } "Erbium-Doped Fiber Amplifier And Its Application To Nonlinear Optics", Proc. SPIE 1171, Fiber Laser Sources and Amplifiers, (15 February 1990); doi: 10.1117/12.963165; https://doi.org/10.1117/12.963165
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