[1] L. Banchi, M. Presi, A. D’Errico, G. Contestabile, E. Ciaramella. All-optical 10 and 40  Gbit/s RZ-to-NRZ format and wavelength conversion using semiconductor optical amplifiers. J. Lightwave Technol., 28, 32-38(2010).

[2] T. Silveira, A. Ferreira, A. Teixeira, P. Monteiro. 40-Gb/s multichannel NRZ to CSRZ format conversion using an SOA. IEEE Photon. Technol. Lett., 20, 1597-1599(2008).

[3] L.-S. Yan, A.-L. Yi, W. Pan, B. Luo, J. Ye. Simultaneous NRZ-to-RZ format conversion and one-to-six error-free channel multicasting using a single pump in a highly nonlinear fiber. Opt. Express, 18, 21404-21409(2010).

[4] W. Astar, J. B. Driscoll, X. Liu, J. I. Dadap, W. M. J. Green, Y. A. Vlasov, G. M. Carter, R. M. Osgood. All-optical format conversion of NRZ-OOK to RZ-OOK in a silicon nanowire utilizing either XPM or FWM and resulting in a receiver sensitivity gain of similar to 2.5  dB. IEEE J. Sel. Top. Quantum Electron., 16, 234-249(2010).

[5] L. R. Chen, J. Wang. All-optical RZ-OOK to RZ-BPSK conversion with multicasting based on XPM in highly nonlinear fiber. Opt. Commun., 285, 3459-3465(2012).

[6] B. M. Cannon, W. Astar, T. Mahmood, P. Apiratikul, G. A. Porkolab, C. J. K. Richardson, G. M. Carter. Data transfer from RZ-OOK to RZ-BPSK by polarization-insensitive XPM in a passive birefringent nonlinear AlGaAs waveguide. J. Lightwave Technol., 31, 952-966(2013).

[7] Y. Xie, S. Gao, S. He. All-optical wavelength conversion and multicasting for polarization-multiplexed signal using angled pumps in a silicon waveguide. Opt. Lett., 37, 1898-1900(2012).

[8] Y. Gao, C. Shu, S. He. Cascaded SOA configuration for NRZ-OOK to RZ-QPSK format conversion. Opt. Commun., 283, 4609-4613(2010).

[9] Y.-H. Wen, K.-M. Feng. A simple NRZ-OOK to PDM RZ-QPSK optical modulation format conversion by bidirectional XPM. IEEE Photon. Technol. Lett., 27, 935-938(2015).

[10] K. Mishina, S. Kitagawa, A. Maruta. All-optical modulation format conversion from on-off-keying to multiple-level phase-shift keying based on nonlinearity in optical fiber. Opt. Express, 15, 8444-8453(2007).

[11] A. Maruta, N. Hashimoto. Experimental demonstration of all-optical modulation format conversion from NRZOOK to RZ-8APSK based on fiber nonlinearity. Optical Fiber Communication Conference, OM3B.1(2012).

[12] G. Huang, Y. Miyoshi, A. Maruta, Y. Yoshida, K. Kitayama. All-optical OOK to 16-QAM modulation format conversion employing nonlinear optical loop mirror. J. Lightwave Technol., 30, 1342-1350(2012).

[13] B. Zou, Y. Yu, X. Huang, Z. Wu, W. Wu, X. Zhang. All-optical format conversion for multichannel QPSK signals. J. Lightwave Technol., 31, 375-384(2013).

[14] G. W. Lu, T. Miyazaki. Experimental demonstration of RZ-8-APSK generation through optical amplitude and phase multiplexing. IEEE Photon. Technol. Lett., 20, 1995-1997(2008).

[15] B. Zhang, H. Zhang, C. Yu, X. Cheng, Y. K. Yeo, P.-K. Kam, J. Yang, H. Zhang, Y.-H. Wen, K.-M. Feng. An all-optical modulation format conversion for 8QAM based on FWM in HNLF. IEEE Photon. Technol. Lett., 25, 327-330(2013).

[16] F. Da Ros, K. Dalgaard, L. Lei, J. Xu, C. Peucheret. QPSK-to-2 × BPSK wavelength and modulation format conversion through phase-sensitive four-wave mixing in a highly nonlinear optical fiber. Opt. Express, 21, 28743-28750(2013).

[17] F. Da Ros, K. Dalgaard, Y. Fukuchi, J. Xu, M. Galili, C. Peucheret. Simultaneous QPSK-to-2 × BPSK wavelength and modulation format conversion in PPLN. IEEE Photon. Technol. Lett., 26, 1207-1210(2014).

[18] G. W. Lu, T. Miyazaki. Optical phase erasure based on FWM in HNLF enabling format conversion from 320-Gbs RZ-DQPSK to 160-Gbs RZ-DPSK. Opt. Express, 17, 13346-13353(2009).

[19] Y. Zhan, M. Zhang, M. Liu, L. Liu, X. Chen. All optical format conversion from 16QAM to QPSK based on four-wave mixing in semiconductor optical amplifier. Asia Communications and Photonics Conference, AS2B.3(2012).

[20] X. Wang, L. Huang, K. Yi, X. Feng, S. Gao. All-optical wavelength conversion and 5-channel multicasting for 20  Gbit/s QPSK signals in a silicon waveguide. Opt. Lett., 39, 6122-6125(2014).

[21] S. Gao, X. Wang, Y. Xie, P. Hu, Q. Yan. Reconfigurable dual-channel all-optical logic gate in a silicon waveguide using polarization encoding. Opt. Lett., 40, 1448-1451(2015).

[22] W. Yang, Y. Yu, M. Ye, G. Chen, C. Zhang, X. Zhang. Phase regeneration for polarization-division multiplexed signals based on vector dual-pump nondegenerate phase sensitive amplification. Opt. Express, 23, 2010-2020(2015).

[23] S. Gao, E.-K. Tien, Y. Huang, S. He. Experimental demonstration of bandwidth enhancement based on two-pump wavelength conversion in a silicon waveguide. Opt. Express, 18, 27885-27890(2010).

[24] M. Kuschnerov, F. Hauske, K. Piyawanno, B. Spinnler, M. Alfiad, A. Napoli, B. Lankl. DSP for coherent single-carrier receivers. J. Lightwave Technol., 27, 3614-3622(2009).

[25] F. Derr. Comparison of electrical and optical BPSK and QPSK systems. J. Opt. Commun., 10, 127-131(1989).