Efficient Er3+-doped optical fiber amplifier pumped by a 1.48-μm high-power laser diode

Yasuo Kimura, Kazunori Suzuki, Masataka Nakazawa

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

Efficient gain characteristics of the Er3+ -doped single-mode fiber amplifier pumped by a high-power laser diode at a wavelength of 1.48 μm are reported. The core diameter, refractive-index difference, and cutoff wavelength of the Er3+ -doped fiber were 6.09 μm, 0.85%, and 1.41 μm, respectively. The fiber absorption loss at 1.535 μm was approx.19.4 dB/m, and the doping concentration was approx.1370 ppm. A CW distributed feedback laser at a wavelength of 1.535 μm was used as a signal source and a high-power laser diode at 1.48 μm as a pumping source. When the absorbed pump power reaches 4.2 mW, the gain is equal to the intrinsic absorption loss for 1.8-m-long fiber. With an increase in the pump power, the gain is as high as 9.1 dB with a 1.8-m-long Er3+-doped fiber for an absorbed pump power of 13 mW. It is clearly shown that the Er3+ ions can be efficiently pumped by a high-power laser diode at 1.48 μm. The gain change is shown as a function of fiber length, where input power power is 32 mW. The absorption loss at 1.535 μm is so large that a gain longer than 1.9 m in length could not be measured. The gain in the 1.0-m-long fiber is 5.0 dB and increases to 9.5 dB in 1.9-m-long fiber. The gain is linearly proportional to the fiber length.

Original languageEnglish
Number of pages1
Publication statusPublished - 1989 Dec 1
Externally publishedYes
EventOptical Fiber Communication Conference: Summaries of Papers - Houston, TX, USA
Duration: 1989 Feb 61989 Feb 9

Other

OtherOptical Fiber Communication Conference: Summaries of Papers
CityHouston, TX, USA
Period89/2/689/2/9

ASJC Scopus subject areas

  • Engineering(all)

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    Kimura, Y., Suzuki, K., & Nakazawa, M. (1989). Efficient Er3+-doped optical fiber amplifier pumped by a 1.48-μm high-power laser diode. Paper presented at Optical Fiber Communication Conference: Summaries of Papers, Houston, TX, USA, .