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