Coherent coupling in vertical cavity laser arrays (Invited)

Kent D. Choquette, Matthew T. Johnson, Zihe Gao, Bradley Thompson, Gautham Ragunathan, Stewart T.M. Fryslie, Meng Peun Tan, Dominic F. Siriani

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


Coherently coupled vertical cavity surface emitting laser (VCSEL) arrays have the potential for ultra-compact beam steering [1], high brightness [2], and high bandwidth modulation [3] microcavity laser sources, all of which are critical components for emerging photonic capabilities. We have developed phased VCSEL arrays which utilize a photonic crystal to define the multiple optical cavities combined with ion implantation to separately define the gain regions and allow separate current injection into the cavities [4]. The leaky-mode coupling between the cavities is engineered via the photonic crystal hole pitch and diameter, while separate current injection enables control of the phase between the elements. Both in phase (with single far field optical lobe on axis) and out-of-phase (multiple far field lobes off-axis) have been demonstrated for both top [2] and bottom emitting [5] coherently coupled arrays. Examples of 1×2, 2×2, and 4×4 arrays are shown in Fig. 1.

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
Country/TerritoryUnited 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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