| 1. |
- Wang, Ke, et al.
(författare)
-
100 Gb/s complete ETDM system based on monolithically integrated transmitter and receiver modules
- 2010
-
Ingår i: 2010 Conference on Optical Fiber Communication, Collocated National Fiber Optic Engineers Conference, OFC/NFOEC 2010. - : OSA Publishing. - 9781557528841 ; , s. 5465571-
-
Konferensbidrag (refereegranskat)abstract
- A complete ETDM system based on monolithically integrated transmitter and receiver modules was demonstrated with BER performance below FEC threshold up to 107 Gb/s. ETDM signal at 112 Gb/s with clear eye opening was also observed.
|
|
| 2. |
- Casolino, M., et al.
(författare)
-
The altcriss project on board the International Space Station
- 2007
-
Ingår i: Advances in Space Research. - : Elsevier BV. - 1879-1948 .- 0273-1177. ; 40:11, s. 1746-1753
-
Tidskriftsartikel (refereegranskat)abstract
- The Alteriss project aims to perform a long term survey of the radiation environment on board the International Space Station. Measurements are being performed with active and passive devices in different locations and orientations of the Russian segment of the station. The goal is to perform a detailed evaluation of the differences in particle fluence and nuclear composition due to different shielding material and attitude of the station. The Sileye-3/Alteino detector is used to identify nuclei up to Iron in the energy range above similar or equal to 60 MeV/n. Several passive dosimeters (TLDs, CR39) are also placed in the same location of Sileye-3 detector. Polyethylene shielding is periodically interposed in front of the detectors to evaluate the effectiveness of shielding on the nuclear component of the cosmic radiation. The project was submitted to ESA in reply to the AO in the Life and Physical Science of 2004 and data taking began in December 2005. Dosimeters and data cards are rotated every 6 months: up to now three launches of dosimeters and data cards have been performed and have been returned with the end of expedition 12 and 13. (C) 2007 Published by Elsevier Ltd on behalf of COSPAR.
|
|
| 3. |
- Cristofori, Valentina, et al.
(författare)
-
25-Gb/s transmission over 2.5-km SSMF by silicon MRR enhanced 1.55-μm III-V/SOI DML
- 2017
-
Ingår i: IEEE Photonics Technology Letters. - : IEEE. - 1041-1135 .- 1941-0174. ; 29:12, s. 960-963
-
Tidskriftsartikel (refereegranskat)abstract
- The use of a micro-ring resonator (MRR) to enhance the modulation extinction ratio and dispersion tolerance of a directly modulated laser is experimentally investigated with a bit rate of 25 Gb/s as proposed for the next generation data center communications. The investigated system combines a 11-GHz 1.55-μm directly modulated hybrid III-V/SOI DFB laser realized by bonding III-V materials (InGaAlAs) on a silicon-on-insulator (SOI) wafer and a silicon MRR also fabricated on SOI. Such a transmitter enables error-free transmission (BER < 10-9) at 25 Gb/s data rate over 2.5-km standard single mode fiber without dispersion compensation nor forward error correction. As both laser and MRR are fabricated on the SOI platform, they could be combined into a single device with enhanced performance, thus providing a cost-effective transmitter for short reach applications.
|
|
| 4. |
- Anders, Berntson, et al.
(författare)
-
Polarisation dependence and gain tilt of Raman amplifiers for WDM systems
- 2001
-
Ingår i: Conference on Optical Fiber Communication, Technical Digest Series. ; , s. MI2/1-MI2/3
-
Konferensbidrag (refereegranskat)abstract
- We investigate the polarisation dependence and gain tilt of Raman amplifiers for WDM systems. We find no polarisation dependence of the gain for backward propagating pumps. Results from experiments on commercial 32-channel WDM system are presented, highlighting the effect of gain tilt and pump depletion.
|
|
| 5. |
- Da Ros, F., et al.
(författare)
-
4-PAM dispersion-uncompensated transmission with micro-ring resonator enhanced 1.55-μm DML
- 2017
-
Ingår i: Optics InfoBase Conference Papers. - : Optics Info Base, Optical Society of America. - 9781943580279
-
Konferensbidrag (refereegranskat)abstract
- Real-time transmission of 14-GBd 4-PAM signal is demonstrated by combining a commercial 1.55-μm DML with a silicon MRR. BER below the HD-FEC threshold is measured after 26-km SSMF transmission without offline digital signal processing.
|
|
| 6. |
- Ozolins, Oskars, et al.
(författare)
-
Optical spectral reshaping for directly modulated 4-pulse amplitude modulation signals
- 2017
-
Ingår i: Transparent Optical Networks (ICTON), 2017 19th International Conference on. - : Institute of Electrical and Electronics Engineers (IEEE). - 9781538608609 ; , s. 1-1
-
Konferensbidrag (refereegranskat)abstract
- The tremendous traffic growth in intra/inter-datacenters requires low-cost high-speed integrated solutions [1]. To enable a significantly reduced footprint directly modulated lasers (DMLs) have been proposed instead of large external modulators. However, it is challenging to use DMLs due to their low dispersion tolerance and limited achievable extinction ratio (ER). A promising solution to this problem is optical spectral reshaping (OSR) since it is possible to increase the dispersion tolerance as well as to enhance the achievable ER for both on-of-keying [2] and 4-pulse amplitude modulation (PAM) [3] signals. However, moving to 4-PAM,many of the impressive demonstrations reported so far rely heavily on off-line digital signal processing (DSP), which increases latency, power consumption and cost. In this talk, we report on (i) a detailed numerical analysis on the complex transfer function of the optical filter for optical spectral reshaping in case of pulse amplitude modulation and(ii) an experimental demonstration of real-time dispersion-uncompensated transmission of 10-GBd and 14-GBd 4-PAM signals up to 10- and 26-km SSMF. This is achieved by combining a commercial 10-Gb/s DML with optical spectral shaping, thus removing the need for any complex off-line DSP and improving dispersion tolerance. These achievements are enabled by OSR based on a passive microring resonator fabricated on the SOI platform [4]. Significant improvement in receiver sensitivities was observed for both a 10-GBd signal after 10-km SSMF transmission and 14-GBd with no penalty after 26-km SSMF transmission.
|
|
| 7. |
|
|
| 8. |
- Wang, Ke, et al.
(författare)
-
100-112 Gbit/s complete ETDM systems based on monolithically integrated transmitter and receiver modules
- 2011
-
Ingår i: Journal of Beijing Institute of Technology (English Edition). - 1004-0579. ; 20:3, s. 410-414
-
Tidskriftsartikel (refereegranskat)abstract
- Traditional intensity modulated two-level electrical time-division multiplexing (ETDM) transmission systems working at 100-112 Gbit/s were investigated. The complete ETDM systems based on monolithically integrated transmitter and receiver modules were demonstrated with bit-error-rate (BER) performance of 10-8 at 107 Gbit/s, and near error-free standard forward error correction (FEC) threshold (2×10-3) at 112 Gbit/s. The experiment results showed that directly modulated high-speed ETDM transmission systems with the symbol rates at 100 Gbaud and beyond were promising candidate for cost-effective 100 GbE applications and might be a preform of the next generation of Terabit/s Ethernet.
|
|
