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26 GHz carrier frequency 10 Gbit/s radio-over-fiber link based on a directly modulated III-V/Si DFB laser
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gasse, Kasper Van Kerrebrouck, Joris Van Abbasi, A. Morthier, Geert Torfs, Guy Roelkens, Günther |
| Copyright Year | 2017 |
| Abstract | Worldwide mobile data traffic is expected to increase an eightfold by 2020 compared to 2015, reaching 30.6 exabytes per month [1]. To keep up with this increasing demand providers will need to use new technologies and network architectures, generally referred to as the 5th generation mobile network or 5G. Current mobile networks have pushed the link spectrum efficiency close to the Shannon limit by using complex modulation formats such as 64-QAM OFDM, leaving little room for improvement. To further improve connectivity and increase bandwidth more spectrum will be needed. This can be achieved through the use of currently unused bands and shrinking cell size to maximize spectrum re-use. To enable this, Radio-over-Fiber (RoF) links will be an important technology. When using higher carrier frequencies, it is beneficial to move the signal processing and signal up-conversion from the cell site to a central office. This greatly reduces deployment and operations cost, while enabling centralized control [2]. This is definitely the case for small cell architectures, where central control and low cost are essential. In many RoF links a Mach-Zehnder Modulator (MZM) is used to imprint the RF signal on an optical carrier, as the MZM provides good linearity and high bandwidth. However, in recent years directly modulated semiconductor lasers (DMLs) have shown rivalling performance in digital transmission [3]. Also as transmitter in RoF links DMLs have been demonstrated as good transmitters [4]. The great advantage of using directly modulated lasers is the lower complexity, cost and insertion loss (defining the link gain) compared to using external modulation. Since deployment and operation costs are essential in 5G scenarios, DMLs are ideally suited as transmitters. |
| Starting Page | 1 |
| Ending Page | 2 |
| Page Count | 2 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.ecio-conference.org/wp-content/uploads/2017/03/ECIO_2017_T3.4.pdf |
| Alternate Webpage(s) | http://photonics.intec.ugent.be/download/pub_3873.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
