Modulated Raman pump for integrated VCSEL-based reach enhancement and clock tone dissemination in optical communication

The fast growth of data traffic in access networks calls for high speed and low-cost optical links. To extend reach for users in metro areas requires optical amplification of the signal carrying data. In this paper we experimentally demonstrate a cost effective technique of extending reach by exploi...

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Bibliographic Details
Published in:Optics communications 2020-03, Vol.459, p.124993, Article 124993
Main Authors: Osiemo, D.M., Waswa, D.W., Muguro, K.M., Isoe, G.M., Gibbon, T.B., Leitch, A.W. R.
Format: Article
Language:English
Subjects:
Data transmission
Optical fibre
Passive optical network
Raman
Reference frequency
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Summary:The fast growth of data traffic in access networks calls for high speed and low-cost optical links. To extend reach for users in metro areas requires optical amplification of the signal carrying data. In this paper we experimentally demonstrate a cost effective technique of extending reach by exploiting Raman pump to both amplify data signal and transmit clock signals. A 1550 nm VCSEL is modulated with a 10 Gbps data and coupled into a 50.7 km fibre to co-propagate with a 4 GHz modulated Raman pump. Error free and enhanced data transmission was achieved with minimum receiver sensitivity of −14.8 dBm and distributed stable clock signal over 50.7 km SMF-Reach. A maximum phase noise of −100.6 dBc/Hz at 10 kHz offset frequency is experimentally measured for 50.7 km fibre transmission with backward Raman amplification. This work presents a real-time technique of transmitting accurate data and stable clock signal for long-reach optical networks.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2019.124993