Abstract

Based on the single channel characterization of a Silicon Photonics (SiP) transceiver with Semiconductor Optical Amplifier (SOA) and semiconductor Mode-Locked Laser (MLL), we evaluate the optical power budget of a corresponding Wavelength Division Multiplexed (WDM) link in which penalties associated to multi-channel operation and the management of polarization diversity are introduced. In particular, channel cross-talk as well as Cross Gain Modulation (XGM) and Four Wave Mixing (FWM) inside the SOA are taken into account. Based on these link budget models, the technology is expected to support up to 12 multiplexed channels without channel pre-emphasis or equalization. Forward Error Correction (FEC) does not appear to be required at 14 Gbps if the SOA is maintained at 25 °C and MLL-to-SiP as well as SiP-to-SOA interface losses can be maintained below 3 dB. In semi-cooled operation with an SOA temperature below 55 °C, multi-channel operation is expected to be compatible with standard 802.3bj Reed-Solomon FEC at 14 Gbps provided interface losses are maintained below 4.5 dB. With these interface losses and some improvements to the Transmitter (Tx) and Receiver (Rx) electronics, 25 Gbps multi-channel operation is expected to be compatible with 7% overhead hard decision FEC.

Highlights

  • Not surprisingly, the realization of a 25 Gbps WDM link is significantly more challenging: A link budget analysis shows that the current version of the chip-scale electronics, combined with the SOA and MLL performance, is not sufficient for reliable 25 Gbps multi-channel operation, once the 2.65 dB Rx penalty measured in ref.[9] at 25 Gbps is taken into account

  • The RIN and line power measurements done on the MLL9 are overlaid on the graph, wherein the RIN corresponds to σP2/PA2V, with PAV the optical power and σP its standard deviation, obtained by integrating the Power Spectral Density (PSD) between 5 MHz and 20 GHz

  • The realization of a 25 Gbps WDM link is significantly more challenging: A link budget analysis shows that the current version of the chip-scale electronics, combined with the SOA and MLL performance, is not sufficient for reliable 25 Gbps multi-channel operation, once the 2.65 dB Rx penalty measured in ref.[9] at 25 Gbps is taken into account

Read more

Summary

Locked Laser

Alvaro Moscoso-Mártir[1], Juliana Müller[1], Elmira Islamova[1,2], Florian Merget 1 & Jeremy Witzens 1. A promising approach for generating a large number of optical carriers on a DWDM grid consists in the heterogeneous integration of lasers into SiP chips during Front-End-Of-Line (FEOL) fabrication[1,2], even though this raises further issues in regards to heatsinking of the light sources We investigate another approach relying on a single semiconductor MLL3 utilized as a multi-carrier light source, in which mode-locking is used to suppress mode partitioning noise. We model a comprehensive link budget for an SiP DWDM link combining a semiconductor single section MLL as a multi-carrier light source with RRMs followed by a single polarization quantum well SOA on the Tx side, with the particular aim of providing compact and power efficient WDM solutions for short distance Datacom interconnects. A comprehensive study of RRM induced chirp and related limitations on long distance transmission can be found in ref.[10]

Architecture Overview
RRM MP
Discussion
Findings
Conclusions
Additional Information
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call