HiLight, Albis team for low cost 10G passive fibre networks
Albis Optoelectronics in Germany has teamed up with HiLight Semiconductor in the UK on a high performance, cost effective receiver for 10Gbit/s passive fibre broadband.
The combined performance of Albis’ APD10F1 photodiode and HiLight’s SLR10G2 CMOS Transimpedance Amplifier (TIA) delivers world class sensitivity levels in a straightforward TO-can.
This combination has negligible optical sensitivity penalties in the presence of localised high power WiFi signal sources as measurement results show less than 1 dB penalty for 5~6 GHz WiFi and almost zero penalty for 2.4 GHz WiFi, reducing the complexity of the design and installation of passivbe fibre networks for broadband.
In this setup, the active noise cancellation circuitry of the TIA enables the usage of only minimal external APD supply components within the BOSA TO-can. The bias of APD10F1 came straight from the SLR10G2 TIA die, eliminating the need for costly biasing circuitry and significantly reducing TO-can BOM costs.
The APD10F1 is a topside illuminated 10 Gbps avalanche photodiode (APD) with a large dual pad layout allowing placement of multiple wire bonds on one pad. The pad metallization is optimized for wire-bonding with the pads positioned to enable easy and direct bonding to most common TIA layouts. In addition, the ultra-small chip footprint saves valuable space in compact packages such as TO-46 and reduces chip cost. The APD10F1 chip is fully qualified and available in high volumes.
The SLR10G2 and APD10F1 can be assembled in a standard side-by-side format within the TO-can package and do not require any complex two-stage build processes such as mounting the APD on-top-of the TIA-LA die.
Avalanche PhotoDiode
Albis’ APD10F1 achieves sensitivity levels of -34.5 dBm (@ BER 5E-5) and -31.0 dBm (@ BER 1E-12) simultaneously when paired with HiLight’s HLR11G1, another low noise 10G TIA product targeting datacom and telecom applications.
The APD can be operated at a low bias voltage of typically 30 V and has an excellent gain-bandwidth product of 90 GHz, making it a perfect candidate for single-mode 10GBASE-ER as well as XG-PON / XGS-PON applications.
“Over the past 15 years we have continuously refined our APD product offering and driven performance to the physical limits in order to achieve best in class sensitivities and an unsurpassed dynamic range” said Vincent Grundlehner, CEO of Albis Optoelectronics.
“The combination of our low noise, high responsivity APD10F1 and HiLight’s SLR10G2 TIA-receiver, results in a simplification of the FTTx receiver design while at the same time improving the performance.”
TIA
The SLR10G2 is the first in a line of new chipsets for PON FTTx that combines the TIA with the LA in a single monolithic chip with a patent pending active noise suppression circuitry within the TIA-LA front-end which minimises any sensitivity penalty due to local WiFi antenna or similar RF noise sources often found within consumer ONU boxes.
In fully limiting mode, the SLR10G2 data outputs maintain a typical 280mVpp output swing from overload to sensitivity – a major technical accomplishment for a 10G APD TO-can receiver – that can further reduce the effects of external noise sources on optical sensitivity outside of the BOSA package.
HiLight’s research shows that that no external metal faraday cage is required over the BOSA in ONU designs offering a further BOM cost saving on the main ONU PCB board. The SLR10G2 can also operate in a more traditional TIA like mode.
The SLR10G2 is sold as bare die with dimensions of just 0.83 mm x 1.05 mm, easily fitting within a standard 5-pin TO-can. The chip is powered from a +3.3V VDD supply and operates over a wide industrial temperature range of -40ᵒC to +95ᵒC.
“The SLR10G2 chip receiver is the most advanced, highest performance solution for 10G-PON ONUs and will provide exceptional levels of sensitivity performance margin in the noisiest of environments; What’s more the SLR10G2 is designed on the same low-cost CMOS process as the established HLR2S50, HLR10G0 and HLR10G1 TIAs, around 100 million of which have already shipped to customers worldwide,” said Christian Rookes, VP Marketing at HiLight.
The SLR10G2 is sampling now.
www.albisopto.com; www.hilight-semi-com
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