Few-mode VCSEL chip for 100-Gb/s transmission over 100 m multimode fiber

Hsuan Yun Kao, Yu Chieh Chi, Cheng Ting Tsai, Shan Fong Leong, Chun Yen Peng, Huai Yung Wang, Jian Jang Huang, Jau Ji Jou, Tien Tsorng Shih, Hao-Chung Kuo, Wood Hi Cheng, Chao Hsin Wu, Gong Ru Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


A few-mode (FM) vertical cavity surface emitting laser (VCSEL) chip with heavily zinc-diffused contact layer and oxide-confined cross-section is demonstrated for carrying pre-leveled 16-quadrature amplitude modulation orthogonal frequency division multiplexing (QAM-OFDM) data in OM4 multi-mode fiber (MMF) over 100 m for intra-data-center applications. The FM VCSEL chip, which has an oxide-confined emission aperture of 5 µm, demonstrates high external quantum efficiency, provides an optical power of 2.2 mW at 38 times threshold condition, and exhibits 3 dB direct-modulation bandwidth beyond 22 GHz at a cost of slight heat accumulation. At a DC bias point of 5 mA (22.6I th ) the FM VCSEL chip, with sufficiently normalized modulation output, supports Baud and data rates of 25 and 100 Gb/s, respectively, with forward error correction (FEC) certifying receiving quality after back-to-back transmission. After passing through 100 m OM4 MMF with a receiving power penalty of 4 dB, the FM VCSEL chip demonstrates FEC-certified transmission of the pre-leveled 16-QAM OFDM data at 92 Gb/s.

Original languageEnglish
Pages (from-to)507-515
Number of pages9
JournalPhotonics Research
Issue number5
StatePublished - 1 Oct 2017


  • (060.2390) fiber optics, infrared
  • (140.7260) vertical cavity surface emitting lasers
  • (200.4650) optical interconnects

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