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EML based real-time 112 Gbit/s (2 × 56.25 Gbit/s) PAM-4 signal transmission in C-band over 80 km SSMF for inter DCI applications
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- Issue Date
- 2018-11
- Citation
- Optical Fiber Technology, v.45, pp.141-145
- ISSN
- 1068-5200
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- We report on an electro-absorption modulator (EAM) integrated laser (EML) based real-time 112 Gbit/s (2 × 56.25 Gbit/s) 4-level pulse amplitude modulation (PAM-4) signal transmission in the C-band over 80 km of standard single-mode fiber (SSMF). Various operating conditions of the EAM were investigated to find the optimum driving conditions for PAM-4 modulation. When the EAM reverse bias was set to the inflection point of the transfer curve, which was ?닋2.35 V, we obtained a bit error ratio (BER) of 4 × 10?닋8, which is well below the forward error correction (FEC) limit. The results demonstrate the feasibility of using EMLs for implementation in PAM-4 transceivers for inter-datacenter interconnection (inter-DCI) applications.
- KSP Keywords
- 4-level pulse amplitude modulation(PAM-4), Bit-error-rate(BER), C-band, Driving conditions, Forward error correction(FEC), Inflection point, Integrated laser, Inter-datacenter, PAM-4 modulation, Real-Time, Reverse bias