| Autor: |
P.S. Cho, Y. Achiam, G. Levy-Yurista, M. Margalit, Y. Gross, J.B. Khurgin |
| Zdroj: |
IEEE Photonics Technology Letters; Mar2004, Vol. 16 Issue 3, p918-920, 3p |
| Abstrakt: |
We have investigated and compared the effect of semiconductor optical amplifier (SOA) nonlinearities on the amplification of 14 dense wavelength-division-multiplexing channels using return-to-zero on-off keying [(RZ-OOK) 1 b/symbol], RZ differential quadrature phase-shift keying [(DQPSK) 2 b/symbol], and polarization (bit interleaved) multiplexed RZ-DQPSK (4 b/symbol) formats with aggregate data rates up to 50 Gb/s per channel. The channel spacing was 20 GHz with spectral efficiency from 0.625 up to 2.5 b/s/Hz. Our results have shown that while RZ-OOK format performs better at lower SOA input powers, RZ-DQPSK suffers less degradation from SOA nonlinearities at higher input powers. Overall, polarization-bit-interleaved RZ-DQPSK format was found to have the best tolerance to SOA nonlinearities. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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