Circular grating surface emitting lasers for free-space optical interconnects

Scott Penner, Ravil Latipov, Hui Luo, Mahmoud Fallahi

Research output: Contribution to journalConference articlepeer-review


Circular grating surface emitting distributed Bragg reflector lasers exhibit extremely small divergence angles and moderately high output power levels which makes them an attractive candidate for free-space interconnects. Computational simulations are used to model the observed results and assist in the design of new functionality such as focusing and beam shaping. Numerical analysis of the coupled mode equations for DBR lasers and free-space propagation of the emitted field have been performed. Surface emission is realized through grating outcoupling provided by a second order grating while feedback is accomplished with an inner annulus consisting of either a first order or second order grating. These gratings are written using electron beam lithography (EBL) and subsequently etched using ECR-RIE. The flexibility of the EBL process enables a variety of different grating designs to be created on a single sample and subsequently compared during device testing.

Original languageEnglish (US)
Pages (from-to)346-353
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jan 1 1999
EventProceedings of the 1999 Optoelectronics Interconnects VI - San Jose, CA, USA
Duration: Jan 27 1999Jan 29 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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