Single Mode Bare Fiber Optic PLC Splitter – 1×4 Overview

Single Mode Bare Fiber Optic PLC (Planar Lightwave Circuit) Splitters in a 1×4 configuration are passive optical devices designed to divide one input optical signal into four equal output signals. Fabricated using silica-based planar waveguide technology, they offer compact size, low insertion loss, and high uniformity, making them ideal for passive optical networks (PON). The “bare fiber” design features unterminated 250μm fibers (no connectors), enabling direct fusion splicing into custom fiber assemblies for space-constrained installations like FTTH distribution boxes or splice trays. These splitters support single-mode fibers (typically G.652 or G.657) and operate over the C-band (1260-1650nm), ensuring compatibility with GPON, EPON, and telecom standards.

Key Features and Specifications

• Split Ratio: 1 input to 4 outputs (equal split: ~25% power per output).
• Fiber Type: Single-mode (SMF-28 or equivalent, 9/125μm core).
• Wavelength Range: 1260-1650nm (optimized for 1310nm and 1550nm).
• Insertion Loss (Typical/Max): 7.1/7.5 dB (1310nm); 7.3/7.7 dB (1550nm).
• Uniformity: ≤0.6 dB (channel-to-channel consistency).
• Return Loss: ≥55 dB (low back-reflection).
• PDL (Polarization Dependent Loss): ≤0.3 dB.
• Directivity: ≥55 dB.
• Packaging: Compact steel tube or blockless ABS box (e.g., 80x20x6mm for steel tube).
• Operating Temperature: -40°C to +85°C; storage -40°C to +85°C.
• Fiber Length: Typically 1m pigtails (customizable); bare ribbon fiber for easy splicing.
• Standards: Telcordia GR-1209/1221 compliant; RoHS; low PDL for stable performance.
• Applications: FTTH/GPON networks, CATV, data centers, optical monitoring, and signal distribution in harsh environments.