Cascaded SOA configuration for NRZ-OOK to RZ-QPSK format conversion

Gao, Ying; Shu, Chester; He, Sailing

doi:10.1016/j.optcom.2010.06.087

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…The QPSK signal can be converted from two OOK signals via the XPM in semiconductor optical amplifier (SOA) [17], however, the output optical power is hard to equalize by using this scheme due to that the two OOK signals are injected into the SOA simultaneously, so there will be a crosstalk between the signals when it is used for signal multicasting. In order to receive constant power of the converted QPSK signal, the XPM process in SOA is properly controlled by an assistant light [18], consequently if multi-channel probe lights are injected into SOA for signal multicasting, the crosstalk between signals is still inevitable. Therefore, it is essential to develop OOK-to-QPSK format conversion scheme with multicasting function and low crosstalk, and this scheme will play a significant role in increasing the efficiency and scalability at the routing node of wavelength division multiplexing (WDM) network.…”

Section: Introductionmentioning

confidence: 99%

All-Optical OOK -to-QPSK Modulation Format Conversion With Wavelength Multicasting Based on Cascaded SOA Configuration

et al. 2020

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An on-off keying (OOK) to quadrature phase shift keying (QPSK) format conversion scheme has been demonstrated in this paper. Two-channel OOK signals are converted into one-channel QPSK signal, and accompanied with a multicast function. The proposed scheme is based on a cascaded semiconductor optical amplifiers (SOA) configuration where the processes of cross phase modulation (XPM) and nonlinear polarization rotation (NPR) are properly controlled by OOK signals in each SOA. The experimental results show that after conversion, four-channel QPSK signals are successfully obtained with open eye-diagrams, and all the converted signals experience a small power penalty of less than 3.4 dB at a bit error rate (BER) of 10 −9 compared to the original signal. In addition, the optical spectra and the constellation diagrams of the converted signal also indicate the high quality performance exhibited by the proposed format conversion scheme.

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Section: Introductionmentioning

confidence: 99%

All-Optical OOK -to-QPSK Modulation Format Conversion With Wavelength Multicasting Based on Cascaded SOA Configuration

et al. 2020

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“…Gao et al demonstrated a format converted technology from OOK to QPSK with a cascaded SOA configuration. But the cross phase modulation must be properly controlled by an assistant light because using conventional SOAs [5].…”

Section: Introductionmentioning

confidence: 99%