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High-gain mode-adapted semiconductor optical amplifier with 12.4-dBm saturation output power at 1550 nm

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12 Author(s)
Dreyer, K. ; Crawford Hill Lab., Lucent Technol. Bell Labs, Holmdel, NJ, USA ; Joyner, C.H. ; Pleumeekers, J.L. ; Burrus, C.A.
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A mode-adapted semiconductor optical amplifier (SOA) has been fabricated and packaged. At the gain peak, 1500 nm, the fiber to fiber gain was measured to be 32.5 dB. Statistics for eight packaged devices indicate that a fiber-to-fiber gain of 26.3 dB ± 1.3 dB and a saturation output power of 12.4 dBm ± 0.4 dBm are typical at a bias of 500 mA for λ = 1550 nm. Polarization sensitivity at 1550 nm was measured to be 1.1 dB ± 0.4 dB and the transverse electric (TE) polarization state noise figure (NF) was determined to be 7.0 dB ± 0.5 dB. The coupling loss was 1.3 dB ± 0.1 dB per facet. This SOA, with a 1.3-nm filter, was used as an optical preamplifier in a 10-Gb/s return-to-zero (RZ) system testbed with a pseudorandom binary sequence (PRBS) of 231 -1. A 14.5-dB improvement in receiver sensitivity was observed at a bit error rate (BER) of 10-11

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Lightwave Technology, Journal of  (Volume:20 ,  Issue: 4 )