Rodes Roberto, Jensen Jesper Bevensee, Zibar Darko, Neumeyr Christian, Roenneberg Enno, Rosskopf Juergen, Ortsiefer Markus, Monroy Idelfonso Tafur
DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark.
Opt Express. 2010 Nov 22;18(24):24969-74. doi: 10.1364/OE.18.024969.
We report on experimental demonstration of a digital coherent detection link fully based on vertical cavity surface emitting lasers (VCSELs) for the transmitter as well as for the local oscillator light source at the receiver side. We demonstrate operation at 5 Gbps at a 1550 nm wavelength with record receiver sensitivity of -36 dBm after transmission over 40 km standard single mode fiber. Digital signal processing compensates for frequency offset between the transmitter and the local oscillator VCSELs, and for chromatic dispersion. This system allows for uncooled VCSEL operation and fully passive fiber transmission with no use of optical amplification or optical dispersion compensation. The proposed system demonstrates the potential of multi-gigabit coherent passive optical networks with extended reach and increased capacity. Moreover, this is, to the best of our knowledge, the first demonstration of coherent optical transmission systems using a low-cost VCSEL as the local oscillator as well as for the transmitter.
我们报道了一种全数字相干检测链路的实验演示，该链路在发射端完全基于垂直腔面发射激光器（VCSEL），在接收端作为本地振荡器光源也基于VCSEL。我们展示了在1550 nm波长下以5 Gbps的速率运行，在通过40 km标准单模光纤传输后，接收灵敏度达到创纪录的-36 dBm。数字信号处理可补偿发射端和本地振荡器VCSEL之间的频率偏移以及色散。该系统允许VCSEL在未冷却的情况下运行，并且完全采用无源光纤传输，无需使用光放大或光色散补偿。所提出的系统展示了具有更远传输距离和更大容量的多千兆位相干无源光网络的潜力。此外，据我们所知，这是首次演示使用低成本VCSEL作为本地振荡器以及发射端的相干光传输系统。
