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Compact and highly efficient fiber amplifier modules pumped by a 0.98-μm laser diode

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9 Author(s)
M. Shimizu ; NTT Opto-electron. Labs., Ibaraki, Japan ; M. Horiguchi ; M. Yamada ; I. Nishi
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Highly efficient and small-size erbium-doped fibers with a gain coefficient of 4.9 dB/mW and a strained quantum-well-type InGaAs laser diode with a lasing wavelength of 0.98 μm as a pumped light source. As a result, the module 4×6×1.5 cm, realized a maximum net gain of 33 dB with an electricity consumption of only 175 mW, which corresponds to a drive current of 80 mA. The module consists of four individual components: a pumping laser diode submodule, a wavelength-division-multiplexing-type fiber coupler, a polarization-insensitive optical isolator, and an erbium-doped single-mode fiber coil

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Journal of Lightwave Technology  (Volume:9 ,  Issue: 2 )