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High-contrast grati...
High-contrast gratings for WDM VCSEL arrays
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- Haglund, Erik, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gustavsson, Johan, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Haglund, Åsa, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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- Bengtsson, Jörgen, 1968 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Larsson, Anders, 1957 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa färre...
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(creator_code:org_t)
- 2014
- 2014
- Engelska.
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Ingår i: Optics & Photonics in Sweden, 11-12 Nov. 2014, Göteborg.
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- Vertical-cavity surface-emitting lasers (VCSELs) have become the workhorse of short-reach optical interconnects in datacenters and supercomputers. The last few years have seen an impressive increase in VCSEL modulation bandwidth, enabling record-high single-channel data rates exceeding 60 Gbit/s [1]. In addition to higher single-channel rates, interconnect capacity may be enhanced by employing multiplexing techniques such coarse wavelength division multiplexing (WDM). WDM VCSEL arrays can be designed using a high-contrast grating (HCG) as top mirror instead of a distributed Bragg reflector (DBR) [2]. The HCG consists of a subwavelength grating of high refractive index material (GaAs) surrounded by low refractive index material (air), see figure 1. The result is a thin, broad-band and highly reflective mirror. The reflection from the HCG has a varying phase depending on grating geometry. This can be used to set the HCG-VCSEL wavelength in a post-growth process by fabricating gratings with different period and duty-cycle. A first proof of concept has been realized and HCG-VCSELs showing resonances covering a span exceeding 20 nm have been demonstrated. Figure 1: Top: schematic figure of HCG-VCSEL array. Left: Top and cross-sectional SEM image of HCG. Right: Simulated and experimental HCG-VCSEL resonance wavelength for different duty cycles and periods (p) measured by electroluminescence. References[1] D. Kuchta et al., “64Gb/s Transmission over 57m MMF using an NRZ Modulated 850nm VCSEL,” OFC 2014[2] V. Karagodsky et al., “Monolithically integrated multi-wavelength VCSEL arrays using high-contrast gratings,” Opt. Express, 18(2), 2010
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Nyckelord
- VCSEL
- optical interconnect
- WDM
- HCG
- high-contrast grating
Publikations- och innehållstyp
- kon (ämneskategori)
- vet (ämneskategori)