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High-Speed 850-nm VCSELs Operating Error-Free Beyond 50 Gbit/s

Emanuel P. Haglund (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Petter Westbergh (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Erik Haglund (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Johan S. Gustavsson (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Anders Larsson (Institutionen för mikroteknologi och nanovetenskap, Fotonik)
Optics and Photonics in Sweden, 22-23 Oct. 2013 (2013)
[Konferensbidrag, poster]

The 850-nm vertical-cavity surface-emitting laser (VCSEL) is a key component in today’s short reach (<100 m) optical interconnects due to low-cost fabrication, excellent high-speed properties at low drive currents, and the availability of high-speed multimode fiber (MMF) optimized for 850 nm. To meet the growing needs in data centers, near future datacom standards will require VCSELs operating well beyond the ~20 Gbit/s which today’s commercially available components are capable of. Through reduction of the electrical parasitics, improvement of the optical confinement, and optimization of the photon lifetime, we recently demonstrated a small-signal bandwidth of 28 GHz for a ~4 µm oxide aperture VCSEL. Using a VCSEL with a larger oxide aperture (~7 µm) and a 30 GHz photoreceiver with an integrated limiting amplifier (VI-systems R40-850) enabled error-free [bit error rate (BER) <10-12] transmission up to 47 Gbit/s back-to-back (BTB) and 44 Gbit/s over 50 m OM4 fiber. Error-free transmission up to 40 Gbit/s was demonstrated BTB at temperatures up to 85°C. By employing a 22 GHz photoreceiver with an integrated linear amplifier (New Focus 1484-A-50), an ~8 µm oxide aperture VCSEL could operate error-free up to 57 Gbit/s BTB, 55 Gbit/s over 50 m, and 43 Gbit/s over 100 m OM4 fiber. These results represent a significant progress of current state-of-the-art in VCSEL performance.

Nyckelord: VCSEL, optical interconnects, data transmission



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Denna post skapades 2013-11-13. Senast ändrad 2016-04-11.
CPL Pubid: 186542

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Fotonik

Ämnesområden

Informations- och kommunikationsteknik
Fotonik

Chalmers infrastruktur