Demonstration of post-growth wavelength control of VCSELs using high-contrast gratings

Haglund, Erik,1985Chalmers tekniska högskola,Chalmers University of Technology (author)

We demonstrate post-growth wavelength setting of vertical-cavity surface-emitting lasers (VCSELs) using high-contrast gratings (HCGs). By fabricating HCGs with different duty-cycle and period, the HCG reflection phase can be varied, in effect giving different optical cavity lengths for HCGVCSELs with different grating parameters. This enables fabrication of monolithic multi-wavelength HCG-VCSEL arrays for wavelength-division multiplexing (WDM). The GaAs HCG is suspended in air by selective removal of an InGaP sacrificial layer. Electrically injected 980-nm HCGVCSELs with sub-mA threshold currents indicate high reflectivity from the GaAs HCGs. Lasing over a wavelength span of 15 nm was achieved, enabling a 4-channel WDM array with 5 nm channel spacing. Device design, fabrication and experimental proof-of-concept are presented.

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Annan elektroteknik och elektronik hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Other Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
Semiconducting gallium
VCSELs
Optical interconnects
Diffraction gratings
High contrast grating
Gallium arsenide
CWDM
Wavelength control
Wavelength division multiplexing
Sacrificial layer
Threshold currents
High-contrast gratings
Optical waveguides
High reflectivity
Transceivers
Electrically injected
Surface emitting lasers

Gustavsson, Johan,1974Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)johangus (author)
Bengtsson, Jörgen,1968Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jorgenb (author)
Haglund, Åsa,1976Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)gu95asha (author)
Larsson, Anders,1957Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)andersla (author)
Fattal, David (author)
Sorin, W. V.Hewlett-Packard Company (author)
Tan, MichaelHewlett-Packard Company (author)
Chalmers tekniska högskolaHewlett-Packard Company (creator_code:org_t)

By the author/editor: Haglund, Erik, 1 ...; Gustavsson, Joha ...; Bengtsson, Jörge ...; Haglund, Åsa, 19 ...; Larsson, Anders, ...; Fattal, David; show more...; Sorin, W. V.; Tan, Michael; show less...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Other Electrical ...

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