Erbium-doped fiber amplifier and its application to nonlinear optics

Masataka Nakazawa, Yasuo Kimura, Kazunori Suzuki, Hirokazu Kubota

研究成果: Article査読


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 µm 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.

ジャーナルProceedings of SPIE - The International Society for Optical Engineering
出版ステータスPublished - 1990 2 15

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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