Liu, Z;
Chen, Y;
Li, Z;
Kelly, B;
Phelan, R;
OCarroll, J;
Bradley, T;
... Slavik, R; + view all
(2015)
High-capacity Directly-Modulated Optical Transmitter for 2-µm Spectral Region.
Journal of Lightwave Technology
, 33
(7)
pp. 1373-1379.
10.1109/JLT.2015.2397700.
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Abstract
The 2-μm wave band is emerging as a potential new window for optical telecommunications with several distinct advantages over the traditional 1.55 μm region. First of all, the hollow-core photonic band gap fiber (HC-PBGF) is an emerging transmission fiber candidate with ultra-low nonlinearity and lowest latency (0.3% slower than light propagating in vacuum) that has its minimum loss within the 2-μm wavelength band. Second, the thulium-doped fiber amplifier that operates in this spectral region provides significantly more bandwidth than the erbium-doped fiber amplifier. In this paper, we demonstrate a single-channel 2-μm transmitter capable of delivering >52 Gbit/s data signals, which is twice the capacity previously demonstrated. To achieve this, we employ discrete multitone modulation via direct current modulation of a Fabry-Perot semiconductor laser. The 4.4-GHz modulation bandwidth of the laser is enhanced by optical injection locking, providing up to 11 GHz modulation bandwidth. Transmission over 500-m and 3.8-km samples of HC-PBGF is demonstrated.
| Type: | Article |
|---|---|
| Title: | High-capacity Directly-Modulated Optical Transmitter for 2-µm Spectral Region |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JLT.2015.2397700 |
| Publisher version: | http://dx.doi.org/10.1109/JLT.2015.2397700 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. © 2015 IEEE. |
| Keywords: | Bandwidth, optical transmitters, optical fiber amplifiers, optical fiber communication, laser mode locking, optical modulation, photonic band gap, semiconductor lasers, thulium. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1530989 |
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