Guang Yong Chu, Adolfo Lerín, Iván N. Cano, Victor Polo, Josep Prat. Coherent ONU based on 850 μm-long cavity-RSOA for next-generation ultra-dense access network[J]. Chinese Optics Letters, 2016, 14(5): 050605
- Chinese Optics Letters
- Vol. 14, Issue 5, 050605 (2016)
Fig. 1. Bidirectional subsystem using heterodyne detection sharing one laser at the ONU for UDWDM-PON using RSOA chip.
Fig. 2. Optical spectrum for 1.25 Gb/s/user DPSK–DPSK bidirectional UDWDM.
Fig. 3. Polarization-independent long-cavity RSOA chip at ONU.
Fig. 4. ASE spectrum at different bias condition.
Fig. 5. Frequency response as a function of the input powers of 0, − 5 − 10 − 15 − 20 − 25 dBm
Fig. 6. Polarization diversity heterodyne Rx.
Fig. 7. BER penalty against cut-off frequencies of the LPF (Rx input power at − 50.6 dBm − 47.5 dBm
Fig. 8. BER penalty versus frequency offset between Tx and LO (Rx input power at − 46.6 − 41.7 dBm
Fig. 9. BER against Rx power back-to-back and after 50 km at 1.25 and 2.5 Gb/s (DFB as transmitter at the ONU, and ECL as the LO at the OLT) together with 2 DFBs at 1.25 Gb/s.
Fig. 10. BER versus Rx power using RSOA chip compared with To-can RSOA (back-to-back, 25°C), and RSOA chip at 22°C.
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