2D Fiber Array for Silicon Photonics, CPO & High-Density Optical Interconnect

1. Product Overview

The GracyFiber 2D Fiber Array is a high-density optical interface designed for advanced photonic packaging where a conventional linear fiber array cannot provide sufficient optical I/O density. Using a two-dimensional matrix fiber architecture, the array enables large numbers of optical channels to be arranged within a compact footprint for photonic engines, silicon photonics packaging, co-packaged optics, and high-bandwidth computing systems.

The available configuration covers 16 to 1024 channels, with a 127 μm core pitch and ±1 μm core-pitch tolerance. The product supports a 1260–1650 nm wavelength range and multiple fiber and connector configurations. The supplied documentation identifies applications including 800G / 1.6T transceivers, AI / GPU optical interconnects, CPO, optical engines, and HPC systems.

2. Key Features

• 2D matrix fiber architecture
• 16 / 32 / 64 / 128 / 256 / 512 / 1024-channel configurations
• 127 μm core pitch
• Core pitch tolerance: ±1 μm
• 1260–1650 nm wavelength range
• Low insertion loss: ≤0.8 dB, typical 0.5 dB
• Return loss: UPC ≥40 dB, APC ≥50 dB
• Compatible with multiple fiber types and connector interfaces
• 250 μm / 350 μm fiber coating options
• Designed for high-density photonic-engine packaging

The source documentation also identifies low optical crosstalk, channel-to-channel uniformity, SM/MM/PM fiber compatibility, and compact photonic-engine packaging as key product characteristics.

3. Applications

• Optical Engines
• 800G / 1.6T Optical Transceivers
• Silicon Photonics Packaging
• Co-Packaged Optics (CPO)
• AI / GPU Optical Interconnects
• High-Performance Computing (HPC)

These applications are explicitly listed in the supplied product documentation.

4. Technical Specifications

The specification table provides the 2D matrix geometry, 127 μm pitch, optical-loss requirements, fiber options, connector options, and temperature ranges above.

5. Configuration & Customization Options

Available Channel Counts

• 16
• 32
• 64
• 128
• 256
• 512
• 1024 channels

Wavelength

• 1260–1650 nm

Geometry

• 2D Matrix

Core Pitch

• 127 μm

Other pitch configurations: [Need confirmation]

Fiber Type

The source specification lists:

• OM1
• OM2
• OM3
• OM4
• OM5
• G67A1
• A2
• B3
• Customized

Exact single-mode fiber designations require confirmation before publication.

Fiber Coating

• 250 μm
• 350 μm

Fiber Length

• 100 ±10 cm
• Customized length

Connector Options

• FC
• LC
• SC
• E2000
• MT
• MPO
• MMC

Substrate / Material

The specification table states:

• Glass
• Ceramic

The product description separately states glass or silicon substrate, so this point requires confirmation.

6. Detailed Product Description

The GracyFiber 2D Fiber Array is designed to increase optical I/O density by arranging fibers in a two-dimensional matrix rather than a conventional one-dimensional linear row. This architecture is relevant to photonic systems where many optical channels must interface with a chip, optical engine, or photonic package within a restricted physical footprint.

The supplied configuration uses a 127 μm fiber pitch with ±1 μm pitch tolerance and supports channel counts ranging from 16 to 1024. This makes the architecture particularly relevant where scaling the number of fiber interfaces becomes a packaging constraint.

Optically, the product is specified for a wavelength range of 1260–1650 nm, with insertion loss of ≤0.8 dB and a typical value of 0.5 dB. Return loss is specified at ≥40 dB for UPC interfaces and ≥50 dB for APC interfaces.

The product documentation also highlights low optical crosstalk and channel-to-channel uniformity, which are important characteristics when a large number of optical paths are placed in close proximity.

Multiple connector interfaces and fiber constructions are available according to the supplied table. This allows the 2D Fiber Array to serve as a dense optical interface between external fiber routing and photonic-engine or chip-level optical interfaces.

Compared with a linear fiber-array architecture, the 2D matrix structure is intended specifically for applications requiring substantially greater channel density within a compact optical package.

7. Application Scenarios

Application 1 — Co-Packaged Optics (CPO)

In CPO architectures, optical interfaces are placed close to switching or processing devices, creating a need for high optical I/O density within limited package space.

The 2D matrix arrangement allows multiple fibers to be organized across two dimensions, making the product suitable for dense photonic-engine interfaces used in CPO packaging. CPO is explicitly identified as an application in the supplied product documentation.

Application 2 — AI / GPU Optical Interconnect

AI and GPU computing platforms require increasingly dense optical connectivity between processing and networking resources.

For photonic engines used in these architectures, a 2D Fiber Array can provide a compact interface for a large number of optical channels. The supplied product information specifically identifies AI / GPU Optical Interconnects and High-Performance Computing as target applications.

Application 3 — 800G / 1.6T Optical Transceiver Packaging

The 2D Fiber Array can be used as a multi-channel optical interface in transceiver or optical-engine packaging where high fiber density and precise channel positioning are required.

The supplied documentation explicitly lists 800G / 1.6T transceivers as an application.

8. Why GracyFiber

GracyFiber supplies passive optical components and fiber-coupling solutions for optical communication and photonic integration applications.

For high-density photonic packaging projects, the GracyFiber product portfolio includes related solutions such as:

• 2D Fiber Arrays
• SM Fiber Arrays
• PM Fiber Arrays
• MFD Fiber Arrays
• Lens Fiber Arrays
• FAUs
• MT Fiber Arrays
• MPO/MTP assemblies
• WDM components
• PM passive optical components

For a 2D Fiber Array project, customers can provide the required matrix configuration, channel count, fiber type, pitch, connector interface, fiber length, and target optical specifications for technical evaluation.

9. Related Products

10. FAQ

1. What is a 2D Fiber Array?

A 2D Fiber Array arranges optical fibers in a two-dimensional matrix rather than a single linear row.

This architecture increases the number of fiber channels that can be accommodated within a compact optical interface and is therefore useful for high-density photonic packaging, optical engines, and CPO systems.

2. How many channels can the GracyFiber 2D Fiber Array support?

The supplied specification lists:

16 / 32 / 64 / 128 / 256 / 512 / 1024 channels.

This enables the fiber-array architecture to scale to applications requiring very high optical I/O density.

3. What is the fiber pitch of the 2D Fiber Array?

The specified core pitch is:

127 μm

with a core-pitch tolerance of:

±1 μm.

For other fiber-pitch requirements, please contact GracyFiber with your required specification.

4. What connector options are available?

The supplied specification lists:

• FC
• LC
• SC
• E2000
• MT
• MPO
• MMC

Fiber length is specified as 100 ±10 cm or customized.

5. Can the 2D Fiber Array be used with single-mode, multimode, and PM fibers?

The product feature section states that the 2D Fiber Array is compatible with SM, MM, and PM fibers.

However, the current technical specification table does not provide a specific PM fiber model. For a PM configuration, please provide the required PM fiber type and polarization requirements to GracyFiber for technical confirmation.

11. Request a Quote

For a 2D Fiber Array quotation or engineering evaluation, please provide:

• Channel count
• Matrix arrangement
• Operating wavelength
• Fiber type
• Fiber pitch
• Required insertion loss
• Required return loss
• Fiber coating
• Fiber length
• Connector type
• Substrate / material requirement
• Target photonic device or optical engine
• Application, such as CPO, SiPh, optical transceiver, or AI optical interconnect

This information helps define the appropriate optical and mechanical configuration for your photonic packaging project.