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Customized MUX/DEMUX FA Assemblies for 40G 100G Optical Transceivers - China Suppliers and Factory
Product Introduction
AWG MUX/DEMUX (Arrayed Waveguide Grating Multiplexer/Demultiplexer) is a core passive photonic component that integrates wavelength division multiplexing (WDM) functionality on a planar lightwave circuit, enabling simultaneous transmission/reception of multiple optical signals over a single fiber.
Core Definition & Dual Function
It is a planar lightwave circuit (PLC)-based device that leverages the diffraction and interference of light in an array of optical waveguides. As a MUX (Multiplexer), it combines multiple optical signals of different wavelengths into one fiber. As a DEMUX (Demultiplexer), it splits a combined multi-wavelength signal back into individual wavelength channels for separate processing.
Key Design & Core Components
- Input/Output Waveguides: Single-mode waveguides (typically 9/125 μm) that carry optical signals to/from the device, with channel counts ranging from 4 to 128 (or higher for dense WDM).
- Arrayed Waveguides: The core functional part—an array of parallel waveguides with precisely controlled length differences. These create phase shifts that diffract light at specific angles based on wavelength.
- Slab Waveguides: Two fan-shaped slab regions (input and output) that distribute light from the input waveguide to the arrayed waveguides, and collect diffracted light from the array to the output waveguides.
- PLC Chip Substrate: A silica glass or InP (Indium Phosphide) base that hosts all waveguides, ensuring dimensional stability and low optical loss.
- Packaging: Hermetic or semi-hermetic packaging with fiber pigtails (or FA-MT connectors) for external connections, and thermal management to maintain wavelength stability.
Critical Performance Traits
Wavelength Precision
Operates in standard WDM bands (C-band: 1530–1565 nm; L-band: 1565–1625 nm) with channel spacing as tight as 0.8 nm (100 GHz) or 0.4 nm (50 GHz) for dense WDM (DWDM).
Low Optical Loss
Typical insertion loss of 3–6 dB (C-band) with low polarization-dependent loss (PDL < 0.3 dB) and channel-to-channel uniformity (< 1 dB).
High Isolation
Channel isolation > 25 dB (typically 30–40 dB), preventing crosstalk between adjacent wavelength channels.
Environmental Stability
Maintains performance over a temperature range of -40℃ to +85℃, with low wavelength drift (< 0.05 nm/℃).
Compact & Scalable
Small form factor (similar to PLC splitters) with support for high channel counts, ideal for space-constrained optical modules.
Typical Applications
Long-Haul & Metro Networks
Enables DWDM systems to multiply fiber capacity, supporting high-speed (10G/100G/400G) data transmission over hundreds of kilometers.
Data Centers
Used in data center interconnects (DCIs) and campus networks to consolidate fiber links, reducing cable complexity and cost.
Optical Transceivers & Modules
Integrated into WDM transceivers (e.g., QSFP-DD, OSFP) for multi-wavelength parallel transmission, enhancing bandwidth per port.
Passive Optical Networks (PONs)
Supports WDM-PON systems, enabling multiple users to share a single fiber with dedicated wavelengths.
Test & Measurement Equipment
Used to generate or analyze multi-wavelength optical signals for network validation.
Frequently Asked Questions
What is the primary function of an AWG MUX/DEMUX?
It operates as a planar lightwave circuit (PLC) device. As a Multiplexer (MUX), it combines optical signals of different wavelengths into a single fiber. As a Demultiplexer (DEMUX), it splits the combined multi-wavelength signal back into individual channels.
What are the core components of an AWG MUX/DEMUX chip?
The core components include Input/Output Waveguides, Arrayed Waveguides (which create precise phase shifts), Slab Waveguides (for light distribution and collection), a PLC Chip Substrate (silica glass or InP), and stable packaging.
In which wavelength bands does the device operate?
It operates in standard WDM bands, specifically the C-band (1530–1565 nm) and the L-band (1565–1625 nm), with channel spacings of 0.8 nm (100 GHz) or 0.4 nm (50 GHz) for DWDM configurations.
What are the typical optical loss and isolation levels?
It features a typical insertion loss of 3–6 dB in the C-band, low polarization-dependent loss (PDL < 0.3 dB), and high channel isolation of > 25 dB (typically 30–40 dB) to prevent crosstalk.
How does temperature affect the performance of the AWG MUX/DEMUX?
The device is designed for high environmental stability, operating reliably across a temperature range of -40℃ to +85℃ with a very low wavelength drift of less than 0.05 nm/℃.
What are the main application scenarios for this technology?
It is widely used in long-haul and metro DWDM networks, data center interconnects (DCIs), high-speed optical transceivers (like QSFP-DD and OSFP), WDM-PON systems, and optical test equipment.