دورية أكاديمية
Cost-Effective 40-Gbaud THP PS-PAM-4 C-Band IM/DD Transmission for 50-km Inter-DCI Utilizing 2-bit DAC
| العنوان: | Cost-Effective 40-Gbaud THP PS-PAM-4 C-Band IM/DD Transmission for 50-km Inter-DCI Utilizing 2-bit DAC |
|---|---|
| المؤلفون: | Zhuo Chen, Zipeng Liang, Junyu Wu, Weiqi Lu, Xinyu Chang, Xiaoxiao Dai, Qi Yang, Chen Liu, Mengfan Cheng, Lei Deng, Deming Liu, William Shieh |
| المصدر: | IEEE Photonics Journal, Vol 16, Iss 3, Pp 1-7 (2024) |
| بيانات النشر: | IEEE, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Applied optics. Photonics LCC:Optics. Light |
| مصطلحات موضوعية: | Data center interconnection, digital-to-analog converter, tomlinson-harashima precoding, intensity modulation direct detection, Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467 |
| الوصف: | Data center interconnections are cost-sensitive. We propose and demonstrate a cost-effective C-band intensity modulation direct detection (IM/DD) transmitter for extended range (ER) inter-datacenter interconnects utilizing only a 2-bit digital-to-analog converter (DAC). Tomlinson-Harashima precoding (THP) is used in transmitter DSP to compensate for dispersion-induced impairments. Due to the uniform distribution of signal levels after THP encoding, a high-resolution DAC is required to generate electrical signals. The hardware cost of the transmitter can be significantly reduced by compressing the physical number of bits (PNOB) of the DAC to 2 bits. We quantize the signal to 4 levels and utilize up-sampling and noise shaping to greatly reduce the in-band quantization noise. The in-band signal to noise ratio (SNR) can be increased to 23 dB. We experimentally demonstrate a cost-effective 40-Gbaud probabilistic shaping PAM-4 C-band IM/DD transmission over 50-km utilizing only a 2-bit DAC in the transmitter without any optical dispersion compensation. The performance of the proposed scheme is proximate to the common case of using an 8-bit DAC. It has a BER gap of about 2 × 10−3 only when the received optical power (ROP) is higher than −6 dBm. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1943-0655 |
| Relation: | https://ieeexplore.ieee.org/document/10530341/; https://doaj.org/toc/1943-0655 |
| DOI: | 10.1109/JPHOT.2024.3400791 |
| URL الوصول: | https://doaj.org/article/0add18beeb8141d2a353a6e751d4b998 |
| رقم الأكسشن: | edsdoj.0add18beeb8141d2a353a6e751d4b998 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 19430655 |
|---|---|
| DOI: | 10.1109/JPHOT.2024.3400791 |