Optimization of mode numbers of VCSELs for small-cell backhaul applications

I. Cheng Lu, Chia Chien Wei, Jin Wei Shi, Hsing Yu Chen, Sheng Fan Tsai, Dar Zu Hsu, Zhi Rui Wei, Jhih Min Wun, Jyehong Chen

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


This paper reports optical orthogonal frequency-division multiplexing (OFDM) transmission using 850 nm Zn-diffusion Vertical-Cavity Surface-Emitting Lasers (VCSELs) and multimode fiber (MMF) for small-cell backhaul applications. We also investigated the influence of side mode suppression ratio (SMSR) on the performance of OFDM modulation. By further optimizing the Zn-diffusion conditions and oxide aperture size, a high-power (6.7 mW) SM (SMSR>30 dB) VCSEL is demonstrated. By using OFDM modulation and bit-loading algorithm, record-high BRDP (91 Gb/s km) at 26 Gb/s transmission under FEC threshold (bit error rate (BER)<3.8×10-3) across 3.5 km OM4 fiber has been successfully demonstrated.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalOptics Communications
StatePublished - 15 Jul 2015


  • Fiber-optic backhaul
  • Fiber-optical communications
  • OFDM
  • Small cell


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