The evolution of fiber to the home (FTTH) technology is a key issue for the telecom industry. Operators need to consider today which optical access platform will allow them to adapt most cost-effectively and intelligently as future bandwidth demand and applications evolve. And, as the massive deployment of FTTH networks continues worldwide, operators expect more from FTTH-based technologies. They expect next-generation technologies to enhance bandwidth and service support capabilities while supporting coexistence with their existing equipment and outside plant.
LIGHTRON’s first decade of history was filled with the design-wins of global PON technology proliferations ; Japan to US, BPON to GE-PON/GPON to 10G-EPON/XGS-PON and finally to NGPON2. LIGHTRON introduces the DML-based NGPON2 ONU and dispersion penalty at C-band has been successfully overcome in the product design to be fully compliant with ITU-T G.989.2 standard requirements. DML-based ONU is more competitive at cost against EML or other available laser-employed technologies.
Moreover, LIGHTRON offers an extensive line-up of NGPON2 product family with the addition of MAC-capable SFP+ ONU (so called PON Stick) and class N2 OLT in XFP form-factor.
| XFP ONU |
Class 3, C-temp, Type A & Type B |
| XFP ONU |
Class 3, I-Temp, Type A & Type B |
| SFP+ ONU |
Class 3, I-Temp |
| XFP OLT |
Class N2, C-Temp, Rx Settling Time 200ns |
Table 1. LIGHTRON NG-PON2 Portfolio Brief
NG-PON2 Characteristics:
- NGPON2 (TWDM) expansible from 40Gbps: 4 wavelengths @ 10Gbps per wavelength today moving to 8x80Gbps in future
- Bonding capable: Multiple wavelengths may be channel-bonded to provide > 10Gbps services with standards work in progress
- Symmetrical and asymmetrical bit rates to fit any service – Supports 10Gbps down per wavelength and 10Gbps up or 2.5Gbps per wavelength
- Tunable: ONU’s utilize tunable optical to dynamically tune to provisioned wavelength(s)
- Coexistence: Wavelength Mux to combine NG-PON2 wavelengths to single fiber, and co-existence element to combine other technologies to single fiber with NG-PON2
- Point-to-point WDM capabilities on the same infrastructure (4-8 wavelengths)
NG-PON2 Impact for the Industry & Subscribers
- Converge all services for business, consumer, wireless-wireline on a single fiber network
- Pay as you grow architecture: add lambdas as required
- 10Gbps + service capabilities to any subscriber
- Lower OpEx with use of tunable optics
- Lower Latency than single wavelength systems
- Bandwidth rebalancing by reassigning users to different wavelengths
- Allows providers to deliver dynamic bandwidth to any subscriber at any time
- Greater inherent reliability and availability with autonomous ONT re-tuning
- Operational protection: move customers to another wavelength while fixing/resetting the card