Ziyang Ma, Qiongqiong Wu, Qihua Li, Zhensen Gao. Ultra-Dense Wavelength Division Multiplexing Passive Optical Network[J]. Laser & Optoelectronics Progress, 2021, 58(5): 0500006
- Laser & Optoelectronics Progress
- Vol. 58, Issue 5, 0500006 (2021)
![Schematic diagram of UDWDM-PON using Nyquist-ISB modulation[7]](/richHtml/lop/2021/58/5/0500006/img_1.jpg)
Fig. 1. Schematic diagram of UDWDM-PON using Nyquist-ISB modulation[7]
![UDWDM-PON using seven-core optical fiber transmission[11]](/richHtml/lop/2021/58/5/0500006/img_2.jpg)
Fig. 2. UDWDM-PON using seven-core optical fiber transmission[11]
Fig. 3. Traditional polarization diversity coherent receiver
Fig. 4. Structure diagram of simplified coherent receiver using two BPDs
Fig. 5. Structure diagram of simplified coherent receiver using a BPD
Fig. 6. Low cost polarization independent coherent receiver proposed by Ciaramella[14]. （a） Type 1； （b） type 2
Fig. 7. Polarization diversity coherent receiver proposed by Tabares et al[17]
Fig. 8. Model of dual electric absorption modulator(DEML) [19]
Fig. 9. UDWDM-PON bidirection transmission completed by DEML[20]
Fig. 10. Two kinds of carrier recovery algorithms[30].（a） Traditional carrier recovery algorithm;（b） simplified carrier recovery algorithm
Fig. 11. LUT-free carrier recovery algorithm[32]
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