QD APT High-Performance 1×2 PLC Splitter: Ideal for GPON, FTTH, and Metro Networks

In today’s digitally driven world, the demand for faster, more reliable, and scalable data transmission is relentless. At the heart of advanced fibre optic systems, particularly Passive Optical Networks (PON), lies a critical yet often understated component: the optical splitter. Among these, the QDAPT PLC (Planar Lightwave Circuit) Optical Splitter stands out as a premier integrated waveguide device engineered for exceptional performance and reliability.

This article provides a comprehensive overview of the QDAPT 1×2 PLC splitter, detailing its technology, key features, diverse applications, and robust specifications that make it an indispensable solution for network builders and operators.

Core Technology: Precision on a Quartz Substrate

The QDAPT PLC splitter is manufactured using advanced lithography techniques on a silica (quartz) glass substrate. This process creates precise optical waveguides that distribute optical power from a single input port to multiple output ports—in this case, a 1×2 configuration. The use of quartz is fundamental, offering superior thermal stability, low intrinsic loss, and excellent compatibility with standard single-mode fibres, ensuring long-term performance integrity.

Key Features: Engineered for Excellence

This splitter is designed to meet the rigorous demands of modern optical networks through a set of outstanding characteristics:

Low Insertion Loss & High Performance: With a maximum insertion loss of ≤4.1 dB and extremely low Polarisation Dependent Loss (PDL ≤0.2 dB), it ensures efficient signal transmission with minimal power degradation and stable performance regardless of the light’s polarisation state.

Superior Signal Integrity: Featuring a high return loss (≥55 dB) and directivity (≥55 dB), it minimizes back reflections and crosstalk, which are crucial for maintaining signal clarity and reducing interference in bidirectional systems such as GPON/EPON.

Exceptional Uniformity & Stability: Excellent channel-to-channel uniformity (≤0.8 dB) ensures balanced power distribution between output ports, while its design guarantees good repeatability and high reliability throughout its operational lifetime.

Broad Operational Versatility: Its wide working wavelength range (1260nm to 1650nm) makes it fully compatible with all major PON standards (GPON, EPON, XG-PON) and other data/telecom services, offering excellent future-proofing.

Rugged Reliability: Built to operate flawlessly across a wide temperature range from -40°C to +85°C, it is suitable for deployment in both controlled indoor environments and harsh outdoor conditions.

Diverse Applications: A Solution for Multiple Frontiers

The versatility of the QDAPT PLC splitter makes it the go-to choice for a wide array of fibre optic applications:

Fibre-to-the-Home/Building (FTTH/FTTx): The cornerstone of PON architectures, efficiently distributing signals from the Central Office (CO) to multiple end-users.

Telecom & Broadband Networks: Essential for GPON, EPON, and upcoming NG-PON systems, as well as metropolitan area networks (MAN) and core network distribution points.

CATV (Cable Television) Systems: Enable the reliable distribution of video and RF signals over fibre with high signal quality.

Enterprise & Data Centres: Used in LAN/WAN setups and data-centre interconnects for secure, high-speed data transmission.

Test & Measurement Equipment: Serves as a reliable component in optical test setups due to its predictable performance and high directivity.

Physical & Technical Specifications (1×2 Model)

The 1×2 model exemplifies a compact and user-friendly design:

Encapsulation: A sturdy, protective box with compact dimensions of 90mm x 20mm x 10mm (LxWxH).

Fibre Interface: Standard SC/APC connectors are typical, providing low reflectance connections. Input and output fibre cable diameters are 2.0mm and 3.0mm, respectively.

Fibre Type: Utilises bend-insensitive G657A fibre, allowing for tighter bends during installation without significant signal loss, ideal for space-constrained FTTx deployments.

Customization: The lead-in/out fibre length can be customized according to user requirements, providing enhanced installation flexibility

Encapsulation Size

Item	1×2
LengthWidthHeight (mm)	902010
Input/Output(mm)	2.0/3.0
Fiber length(M)	User defined

Specifications

Item	1×2
Fiber Type	G657A
Working Wavelength	1260nm~1650nm
Standard Insertion Loss (dB)	≤4.1
Uniformity (dB)	≤0.8
PDL (dB)	≤0.2
Wavelength Dependent Loss (dB)	≤0.8
Return Loss (dB)	≥55
Directivity (dB)	≥55
Operating Temp. Gange	-40℃~ +85℃

The QDAPT 1×2 PLC Optical Splitter is more than just a passive component; it is a high-precision, reliable, and versatile engine for distributing optical power. Its combination of low-loss performance, broad wavelength compatibility, robust environmental durability, and compact form factor makes it an optimal choice for network engineers designing next-generation FTTH, telecom, and enterprise optical systems. By selecting a component based on proven PLC technology and stringent specifications, operators can ensure network efficiency, reduce maintenance costs, and establish a foundation that is ready for future bandwidth demands.