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Journal ArticleDOI

Gigabit free-space multi-level signal transmission with a mid-infrared quantum cascade laser operating at room temperature

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TLDR
Gigabit free-space transmissions are experimentally demonstrated with a quantum cascaded laser emitting at mid-wavelength infrared of 4.65 μm, and a commercial infrared photovoltaic detector, and the proposed transmission link shows a stable operational performance in the lab environment.
Abstract
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.

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Citations
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Journal ArticleDOI

10 Gbps DPSK transmission over free-space link in the mid-infrared.

TL;DR: The implementation of 10 Gbps high-speed mid-infrared (MIR) free-space optical (FSO) communication is experimentally demonstrated by means of the developed robust high- Speed MIR transmitter and receiver modules, which exhibit long-term stability and can be applied to field experiments.
Journal ArticleDOI

Free-Space Communication With Directly Modulated Mid-Infrared Quantum Cascade Devices

TL;DR: In this article, the communication capabilities of two kinds of semiconductor laser emitting in one of the atmosphere transparency windows, around 4 ¼ $ m, were analyzed in terms of maximum transmission data rate.
Journal ArticleDOI

On-Chip Mid-Infrared Supercontinuum Generation from 3 to 13 μm Wavelength.

TL;DR: The experimental demonstration of on-chip two-octave supercontinuum generation in the mid-infrared wavelength, ranging from 3 to 13 μm (that is larger than 2500 cm–1) and covering almost the full transparency window of germanium, paving the way for wideband, coherent, and compact mid- Infrared light sources by using a single device and compatible with large-scale fabrication processes.
Proceedings ArticleDOI

Free-space optical communications with quantum cascade lasers

TL;DR: This paper sketches out the main market scenarii for FSO communications, where data channels should reach up to Tbit/s over distances that range from 0.1 to 36000 km, and tries and translates the constraints of the system-level into challenges for device-level research and development.
References
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PatentDOI

Quantum cascade laser

TL;DR: In this paper, the authors proposed a quantum cascade laser consisting of a gain region (14) consisting of several layers (20) each including: alternating strata of a first type (28) defining each AllnAs quantum barrier and strata with injection barriers interposed between two of the layers.
Journal ArticleDOI

Quantum cascade lasers and the Kruse model in free space optical communication

TL;DR: It is shown that a mid-infrared source (8.1 microm) provides enhanced link stability with 2x to 3x greater transmission over near infrared wavelengths during fog formation and up to 10x after a short scavenging rain event where fog developed and visibility reduced to approximately 1 km.
Journal ArticleDOI

High-speed modulation and free-space optical audio/video transmission using quantum cascade lasers

TL;DR: In this paper, the high-speed direct modulation response of mid-infrared quantum cascade (QC) lasers is investigated up to a frequency of 2 GHz, showing high-frequency data transmission capabilities.
Journal ArticleDOI

High-speed digital data transmission using mid-infrared quantum cascade lasers

TL;DR: In this article, error-free digital data transmission at 2.5 Gbit/s was demonstrated with devices emitting at 8 µm and operating at temperatures up to 85 K.
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