Modulation bandwidth enhancement via resonance detuning in coherently coupled vertical cavity laser arrays

Stewart T.M. Fryslie, Matthew T. Johnson, Meng Peun Tan, Dominic F. Siriani, Kent D. Choquette

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Vertical cavity surface emitting lasers (VCSELs) are the dominant source for optical data communication links in computer server, data center, and super computer applications. These applications demand higher bandwidth (> 20 Gbps), longer fiber propagation length (> 1 km), and lower power operation. There have been several reports of VCSEL modulation bandwidth in excess of 50 Gbps [1, 2] although these experiments have been into a few 10s of meter of fiber and require very high current density. Modulation gain bandwidth x distance products of 25×1 [3], 20×2 [4], and 1×10 [5] Gbps/km have been achieved using single mode or quasi-single mode VCSELs. Note that longer propagation implies lower bandwidth presumably due to insufficient power. Recently transversely coupled VCSELs have been shown to operate at 36 Gbps, albeit in highly multi-mode operation [6]. We report significant bandwidth enhancement achieved from 1×2 coherently coupled photonic crystal VCSEL arrays. 25 GHz small signal bandwidth (receiver limited) is obtained under single mode operation and simultaneous increased output power, which is nearly a 3-fold improvement compared to incoherent array modulation.

Original languageEnglish (US)
Title of host publication2014 IEEE Photonics Conference, IPC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages2
ISBN (Electronic)9781457715044
StatePublished - Dec 22 2014
Event27th IEEE Photonics Conference, IPC 2014 - San Diego, United States
Duration: Oct 12 2014Oct 16 2014

Publication series

Name2014 IEEE Photonics Conference, IPC 2014


Other27th IEEE Photonics Conference, IPC 2014
CountryUnited States
CitySan Diego

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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