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Gigabit free-space multi-level signal transmission with a mid-infrared quantum cascade laser operating at room temperature
RISE - Research Institutes of Sweden, ICT, Acreo.
RISE - Research Institutes of Sweden, ICT, Acreo.
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
Show others and affiliations
2017 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 42, no 18, 3646-3649 p.Article in journal (Refereed) Published
Abstract [en]

Gigabit free-space transmissions are experimentally demonstrated with a quantum cascaded laser (QCL) emitting at mid-wavelength infrared of 4.65 μm, and a commercial infrared photovoltaic detector. The QCL operating at room temperature is directly modulated using on–off keying and, for the first time, to the best of our knowledge, four- and eight-level pulse amplitude modulations (PAM-4, PAM-8). By applying pre- and post-digital equalizations, we achieve up to 3 Gbit/s line data rate in all three modulation configurations with a bit error rate performance of below the 7% overhead hard decision forward error correction limit of 3.8 × 10−3. The proposed transmission link also shows a stable operational performance in the lab environment.

Place, publisher, year, edition, pages
2017. Vol. 42, no 18, 3646-3649 p.
Keyword [en]
Bit error rate, Error correction, Infrared radiation, Modulation, Optical communication, Quantum cascade lasers, Bit error rate (BER) performance, Digital equalization, Free-space transmission, Infrared photovoltaic, Mid-infrared quantum cascade, Mid-wavelength infrared, Operational performance, Quantum-cascaded lasers, Pulse amplitude modulation
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:ri:diva-31343DOI: 10.1364/OL.42.003646Scopus ID: 2-s2.0-85029524769OAI: oai:DiVA.org:ri-31343DiVA: diva2:1147586
Note

Funding details: 2015-05470, VR, Vetenskapsrådet;

Funding details: 2016-04510, VR, Vetenskapsrådet;

Funding details: 608099, PEOPLE, FP7 People: Marie-Curie Actions;

Funding details: Knut och Alice Wallenbergs Stiftelse;

Funding text: Vetenskapsrådet (VR) (2015-05470, 2016-04510, Linné Excellence Center ADOPT); FP7 People: Marie-Curie Actions (PEOPLE) (608099); Knut och Alice Wallenbergs Stiftelse.

Available from: 2017-10-06 Created: 2017-10-06 Last updated: 2017-10-06Bibliographically approved

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