| 1. |
- Lu, Yang, et al.
(author)
-
Matrix Receiving Scheme Supporting Arbitrary Multiple-Wavelength Reception for Optical Interconnects
- 2017
-
In: European Conference on Optical Communication, ECOC. - : IEEE. - 9781538656242
-
Conference paper (peer-reviewed)abstract
- An arbitrary multiple-wavelength reception scheme using only a few fixed-wavelength filters is proposed for optical interconnects. Filter matrices design based on error-control coding theory is devised. The feasibility of the proposed scheme is demonstrated in a four-wavelength reception experiment.
|
|
| 2. |
- Lin, Rui, 1988, et al.
(author)
-
Telecommunication compatibility evaluation for co-existing quantum key distribution in homogenous multicore fiber
- 2020
-
In: IEEE Access. - : Institute of Electrical and Electronics Engineers Inc.. - 2169-3536. ; 8, s. 78836-78846
-
Journal article (peer-reviewed)abstract
- Quantum key distribution (QKD) is regarded as an alternative to traditional cryptography methods for securing data communication by quantum mechanics rather than computational complexity. Towards the massive deployment of QKD, embedding it with the telecommunication system is crucially important. Homogenous optical multi-core fibers (MCFs) compatible with spatial division multiplexing (SDM) are essential components for the next-generation optical communication infrastructure, which provides a big potential for co-existence of optical telecommunication systems and QKD. However, the QKD channel is extremely vulnerable due to the fact that the quantum states can be annihilated by noise during signal propagation. Thus, investigation of telecom compatibility for QKD co-existing with high-speed classical communication in SDM transmission media is needed. In this paper, we present analytical models of the noise sources in QKD links over heterogeneous MCFs. Spontaneous Raman scattering and inter-core crosstalk are experimentally characterized over spans of MCFs with different refractive index profiles, emulating shared telecom traffic conditions. Lower bounds for the secret key rates and quantum bit error rate (QBER) due to different core/wavelength allocation are obtained to validate intra- and inter-core co-existence of QKD and classical telecommunication
|
|
| 3. |
- Lu, Yang, et al.
(author)
-
Multi-channel collision-free reception for optical interconnects
- 2018
-
In: Optics Express. - : OPTICAL SOC AMER. - 1094-4087. ; 26:10, s. 13214-13222
-
Journal article (peer-reviewed)abstract
- A multi-channel reception scheme that allows each node to receive an arbitrary set of wavelengths simultaneously (i.e., collision-free) is proposed for optical interconnects. The proposed scheme only needs to use a few receivers and fixed-wavelength filters that are designed based on error-control coding theory. Experiments with up to four channel collision-free reception units are carried out to demonstrate the feasibility of the proposed scheme.
|
|
| 4. |
- Zhang, Lu, et al.
(author)
-
Toward terabit digital radio over fiber systems : Architecture and key technologies
- 2019
-
In: IEEE Communications Magazine. - : Institute of Electrical and Electronics Engineers Inc.. - 0163-6804 .- 1558-1896. ; 57:4, s. 131-137
-
Journal article (peer-reviewed)abstract
- To support massive deployment of broadband radio applications, such as 5G and high-definition videos for terrestrial televisions, large system capacity and high spectrum efficiency are highly demanded in radio over fiber (RoF) systems. In this article, we propose a terabit digital RoF system capable of providing high-speed transmission, where multicore fiber (MCF) is introduced for the access segment between the central unit and remote unit. Two key technologies that greatly enhance system capacity and spectrum efficiency, namely MCF enabled self-homodyne detection and compressed quantization, are demonstrated.
|
|
| 5. |
|
|
| 6. |
- Lin, Rui, 1988, et al.
(author)
-
Embedding quantum key distribution into optical telecom communication systems
- 2019
-
In: International Conference on Transparent Optical Networks. - : IEEE Computer Society. - 9781728127798 ; 2019-July
-
Conference paper (peer-reviewed)abstract
- Quantum key distribution (QKD) together with one-time pad cryptography provides unconditional security for the sensitive information. However, the lack of telecom compatibility hinders massive deployment of QKD. In this talk we will discuss the approaches of embedding QKD in optical communication systems and the recent progress.
|
|
| 7. |
|
|
| 8. |
- Zhang, Lu, et al.
(author)
-
Kernel mapping for mitigating nonlinear impairments in optical short-reach communications
- 2019
-
In: Optics Express. - : OSA - The Optical Society. - 1094-4087. ; 27:21, s. 29567-29580
-
Journal article (peer-reviewed)abstract
- Nonlinear impairments induced by the opto-electronic components are one of the fundamental performance-limiting factors in high-speed optical short-reach communications, significantly hindering capacity improvement. This paper proposes to employ a kernel mapping function to map the signals in a Hilbert space to its inner product in a reproducing kernel Hilbert space, which has been successfully demonstrated to mitigate nonlinear impairments in optical short-reach communication systems. The operation principle is derived. An intensity modulation/direct detection system with 1.5-µm vertical cavity surface emitting laser and 10-km 7-core fiber achieving 540.68-Gbps (net-rate 505.31-Gbps) has been carried out. The experimental results reveal that the kernel mapping based schemes are able to realize comparable transmission performance as the Volterra filtering scheme even with a high order.
|
|
| 9. |
- Chen, XÍ, et al.
(author)
-
TDHQ Enabling Fine-granularity Adaptive Loading for SSB-DMT Systems
- 2018
-
In: IEEE Photonics Technology Letters. - : Institute of Electrical and Electronics Engineers Inc.. - 1041-1135 .- 1941-0174. ; 30:19, s. 1687-1690
-
Journal article (peer-reviewed)abstract
- In this letter, we introduce time domain hybrid quadrature amplitude modulation (TDHQ) for the single sideband (SSB) discrete multi-tone (DMT) systems. Experimental results reveal that with a single precoding set and the proposed adaptive loading algorithm, the TDHQ scheme can achieve finer granularity and therefore smoother continuous growth of data rate than that with the conventional quadrature amplitude modulation (QAM). Besides, thanks to the frame construction and the tailored mapping rule, the scheme with TDHQ has an obviously better peak to average power ratio (PAPR).
|
|
| 10. |
- Verplaetse, Michiel, et al.
(author)
-
Real-Time 100 Gb/s Transmission Using Three-Level Electrical Duobinary Modulation for Short-Reach Optical Interconnects
- 2017
-
In: Journal of Lightwave Technology. - : IEEE. - 0733-8724 .- 1558-2213. ; 35:7, s. 1313-1319
-
Journal article (peer-reviewed)abstract
- Electrical duobinary modulation is considered as a promising way to realize high capacity because of the low bandwidth requirement on the optical/electrical components and high tolerance toward chromatic dispersion. In this paper, we demonstrate a 100 Gb/s electrical duobinary transmission over 2 km standard single-mode fiber reaching a bit error rate under 7% HD-FEC threshold with the use of PRBS7. This link is tested in real-time without any form of digital signal processing. In-house developed SiGe BiCMOS transmitter and receiver ICs are used to drive an electroabsorption modulated laser and decode the received signal from a PIN-photodiode. The performance of 50 and 70 Gb/s nonreturn-to-zero and electrical duobinary transmission are investigated for comparison.
|
|
