Reducing the spectral width of high speed oxide confined VCSELs using an integrated mode filter
Paper in proceedings, 2012

We have reduced the spectral width of high speed oxide confined 850 nm VCSELs using a shallow surface relief for suppression of higher order transverse modes. The surface relief acts as a mode filter by introducing a spatially varying and therefore mode selective loss. The VCSEL employs multiple oxide layers for reduced capacitance which leads to a strong index guiding and a large spectral width in the absence of a mode filter. With an appropriate choice of surface relief parameters, the RMS spectral width for a 5 jam oxide aperture VCSEL is reduced from 0.6 to 0.3 nm. The small signal modulation bandwidth is 19 GHz. Due to reduced effects of chromatic and modal fiber dispersion, the maximum error-free (bit-error-rate < 10(-12)) transmission distance at 25 Gb/s over OM3+ fiber is increased from 100 to 500 m.

surface-emitting lasers

surface relief

transverse modes

output power

spectral width

high speed modulation

mw

mode filter

VCSEL

Author

Erik Haglund

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Åsa Haglund

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Johan Gustavsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Benjamin Kögel

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Petter Westbergh

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Anders Larsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Proceedings of SPIE - The International Society for Optical Engineering

0277786X (ISSN) 1996756X (eISSN)

Vol. 8276 Article Number: 82760L- 82760L

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1117/12.908424

ISBN

978-0-81948-919-7

More information

Created

10/7/2017