Lensed Fiber Array for PIC Edge Coupling – 1 to 48 Channels

Lensed Fiber Array for PIC Edge Coupling – 1 to 48 Channels

GracyFiber Lensed Fiber Arrays are precision multi-channel optical interfaces designed for efficient coupling between optical fibers and photonic integrated circuits (PICs). Micro-lenses integrated at the fiber end face provide controlled beam shaping and mode matching while expanding alignment tolerance for edge-coupling architectures. Available in 1 to 48 channels, the product supports SM, MM, and PM fiber configurations and offers customizable beam waist, working distance, core pitch, polishing angle, fiber length, and connector options for silicon photonics, optical engines, CPO, and high-speed optical interconnect applications.

• 1 to 48 channel configurations
• Micro-lens structure designed for PIC edge coupling
• Beam waist: 2–5 µm, customizable to match PIC mode field diameter
• Working distance: 10–30 µm
• Compatible with single-mode, multimode, and polarization-maintaining fibers
• Expanded alignment tolerance and excellent channel uniformity
• Insertion loss ≤1.2 dB, typical 1.0 dB
• Channel-dependent core pitch and precision pitch tolerance

The supplied product description also specifies low optical crosstalk, high manufacturing repeatability, and optimization for photonic-chip edge coupling. No numerical crosstalk specification is provided.

• Optical Engines
• Silicon Photonics
• LiNbO₃ Modulators
• Co-Packaged Optics (CPO)
• AI / GPU Optical Interconnect
• High-Speed Data Center Networks

These applications are explicitly listed in the supplied product documentation.

A lensed fiber array provides a multi-channel optical interface between fibers and photonic devices. In this product, micro-lenses are integrated at the fiber end faces to provide mode matching and increase alignment tolerance for edge coupling to photonic integrated circuits.

The specified beam waist is 2–5 µm and can be customized to match the PIC mode field diameter. The specified working distance is 10–30 µm.

The supplied product description states that the Lensed Fiber Array is compatible with SM, MM, and PM fibers. Specific PM fiber types are [Need confirmation].

The supplied specification lists an insertion loss of ≤1.2 dB, with 1.0 dB typical. Return loss is specified as UPC ≥40 dB and APC ≥50 dB.

Yes. The documentation specifically states that the beam waist can be customized to match the PIC MFD, polishing angles can be customized, and fiber length can also be customized.

The main optical and mechanical specifications above are taken from the supplied Lensed Fiber Array specification table.

The supplied specification table shows channel-dependent core-pitch configurations, including 127/350 µm for the 4-channel version.

The dimensional matrix is provided in the page 3 specification table.

• 1CH
• 2CH
• 4CH
• 8CH
• 12CH
• 16CH
• 24CH
• 32CH
• 48CH

Available according to channel configuration:

• 127 µm
• 250 µm
• 350 µm in the documented 4CH 127/350 configuration

Available Options:

• 2–5 µm
• Customizable to match PIC MFD

• 10–30 µm

Available Options:

• 8°
• 90°
• Customized angles such as 12° and 21°
• Other angles: [Need confirmation]

The product is documented as compatible with:

• Single-mode fiber
• Multimode fiber
• Polarization-maintaining fiber

The specification table also lists:

• OM1
• OM2
• OM3
• OM4
• OM5
• G67A1 [Need confirmation]
• A2
• B3
• Customized fiber

Available Options:

• 250 µm fiber
• 900 µm loose tube
• Ribbon

• Standard: 100 ±10 cm
• Customized length available

Available Options:

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

• Lid

Other housing or lidless configurations: [Need confirmation]

[Need confirmation — conflicting values in the supplied Word and Excel specifications]

The GracyFiber Lensed Fiber Array is designed to provide a controlled optical interface between multiple fibers and photonic integrated devices. Unlike a conventional polished fiber array, this configuration integrates micro-lens structures at the fiber end faces to shape the emitted or received optical beam before it reaches the photonic chip.

This optical structure is particularly relevant to edge-coupled PIC architectures, where fiber-to-chip coupling depends on mode-field matching, working distance, beam size, and mechanical alignment. The documented Lensed FA supports a 2–5 µm beam waist, customizable to match the PIC mode field diameter, together with a 10–30 µm working distance.

Channel configurations range from 1 to 48 fibers, with core-pitch options determined by channel count. The array uses precision pitch control with specified tolerances ranging from ±0.3 µm to ±0.7 µm. These parameters define the physical relationship between adjacent optical channels and the corresponding interfaces on the photonic device.

The product supports multiple polishing geometries, including 8° and 90°, as well as customized angles. It is also described as compatible with single-mode, multimode, and polarization-maintaining fibers, enabling the optical interface to be configured according to the corresponding photonic platform.

Specified optical performance includes insertion loss of ≤1.2 dB with 1.0 dB typical, together with return loss of ≥40 dB for UPC and ≥50 dB for APC.

The Lensed Fiber Array is therefore intended for photonic systems where multi-channel fiber alignment, beam shaping, mode matching, and controlled fiber-to-chip coupling are required in a compact interface.

In a silicon photonics package, multiple optical channels must be coupled between the external fibers and the PIC edge interface.

The Lensed Fiber Array provides an organized multi-channel fiber interface while the integrated micro-lenses control the optical beam between the fibers and chip.

The customizable 2–5 µm beam waist allows the interface to be configured according to the PIC mode-field requirement, while the 10–30 µm working distance defines the optical spacing between the lensed fiber interface and photonic device.

Optical engines and CPO architectures require compact multi-channel fiber interfaces between photonic devices and the external optical interconnect.

A Lensed Fiber Array can be positioned at the optical engine or PIC interface to provide multiple aligned optical channels in a single array structure.

The available 1–48 channel configurations allow the array geometry to be selected according to the optical-channel architecture.

The supplied product documentation specifically identifies LiNbO₃ modulators as an application.

In this configuration, the Lensed Fiber Array provides a multi-fiber optical interface to the photonic device, with adjustable optical parameters suchs as beam waist, working distance, pitch, and polish angle selected according to the required coupling geometry.

GracyFiber focuses on passive optical components and precision fiber-interface products for optical communication and photonics applications.

The broader product portfolio includes:

• Fiber Arrays and FAUs
• Lensed Fiber Arrays
• PM Fiber Arrays
• MFD Fiber Arrays
• MPO/MTP Interconnects
• WDM / CWDM / DWDM Components
• AAWG
• PLC and FBT Components
• Polarization-Maintaining Optical Components

For the Lensed Fiber Array family, the supplied specifications include both standard and customized configurations for channel count, optical beam size, fiber type, fiber length, connector interface, polish angle, and other fiber-array parameters.

This allows the fiber interface to be specified around the requirements of the corresponding PIC or photonic assembly rather than relying on a single fixed configuration.