Si Mach-Zehnder Modulator for PAM-4, QAM-OFDM, and DMT Transmission at C-Band

Bo Yuan Lee, Chih Hsien Cheng, Cheng Ting Tsai, Huang Shen Lin, Shih Chun Kao, Patrick Chiang, Hsiang Chieh Lee, Tien Tsorng Shih, Hao Chung Kuo, Gong Ru Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A silicon (Si) Mach-Zehnder modulator (MZM) is demonstrated for 10-km SMF Link at C-band (1550 nm), which allows the pre-emphasized 4-level pulse amplitude modulation (PAM-4) data transmission at 50 GBaud (100 Gbit/s) per channel. By employing the pre-emphasis to the PAM-4 data over different links, the channel dispersion-induced power fading can be compensated. The PAM-4 data with improved spectral usage efficiency in limited bandwidth is employed to encode the Si MZM, and the maximal transmission capacities of 50 GBaud for back-to-back (BtB), 50 GBaud for 2-km SMF, and 26 GBaud for 10-km DSF under KP4-FEC criterion are respectively obtained for providing 100/100/52 Gbit/s data transmission with qualified bit error ratios of 1.5×10-4/2×10-4/1.4×10-4. The penalties on the sensitivity of the receiving power are 0.32 dB for 50-GBaud PAM-4 data after 2-km-SMF link and 0.64 dB for 26-GBaud PAM-4 data over 10-km DSF as compared to the BtB case. Such a scheme takes advantages including the lower power consumption with less circuit complexity than traditional push-pull driven operation, which certifies the 50-GBaud PAM-4 data capability per channel for inter-data-center applications. In addition, this Si MZM device can also modulate the pre-emphasized 16-QAM OFDM data at 140 Gbit/s and the bit-loaded DMT data at 153 Gbit/s.

Original languageEnglish
Article number3500112
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number6
StatePublished - 1 Nov 2023


  • and 4-level pulse amplitude modulation (PAM-4)
  • Data center
  • Mach-Zehnder Modulator (MZM)
  • Si photonics


Dive into the research topics of 'Si Mach-Zehnder Modulator for PAM-4, QAM-OFDM, and DMT Transmission at C-Band'. Together they form a unique fingerprint.

Cite this