A fiber array (FA) is a basic component used in high-speed optical modules and silicon-photonics coupling arrays. It consists of multiple fibers precisely arranged in V-grooves, held by a cover plate and encapsulated with adhesive. Its assembly quality directly affects optical alignment and downstream coupling efficiency. Because the fibers are thin, the V-grooves are narrow and several glue positions are involved, alignment, pressing and dispensing demand high process consistency. Shenzhen Xingte Technology Co., Ltd. has built an FA assembly and dispensing line that integrates fixture loading, precision alignment, cover pressing, multi-station dispensing and thermal curing, delivering automatic assembly from material loading to finished-part removal.
1. FA Structure and Assembly Challenges
The core of an FA is the V-groove substrate and an aligned row of fibers: each fiber must drop into the groove and remain parallel at equal spacing, then be pressed down by a cover plate, and finally be dispensed at positions inside the groove, at the tail and at the head. In manual assembly, fiber-to-groove alignment depends on operator experience, pressing force is hard to keep stable, and dispensed volume varies with technique, which easily leads to offset, overflow or insufficient glue. The automated line addresses these issues by leaving alignment, pressing, dispensing and curing to precision mechanisms and a control system.
2. Main Line Flow
The line is arranged in process order: a fixture auto-loading station carries the FA fixture into position; fibers are precisely aligned and placed into the V-grooves; a cover press plate presses down to hold the fibers firmly; then the part moves to dispensing and curing stations; after that the fixture is automatically unlocked and separated, flipped 180 degrees and sent through multi-stage curing; finally the cured part flows with the fixture to the unloading end for manual take-out. The line completes loading, pressing, dispensing and curing in one pass, reducing manual transfer between steps.
3. Multi-station Precision Dispensing
To cover different glue positions on the FA, the line is equipped with a multi-station dispensing system for in-groove dispensing, tail dispensing and head dispensing. The volume at each position is uniformly controlled by the equipment, with dispensing rhythm synchronized to fixture positioning, so glue amount stays even and controllable, avoiding overflow and insufficient glue. The division of stations also lets each glue position run on its own cycle, making setup and changeover easier.
4. 180-degree Flip and Multi-stage Curing
After dispensing, the fixture is automatically unlocked and separated, and the line performs a 180-degree flip so the part enters multi-stage curing under different orientations. Staged curing helps the adhesive set gradually and reduces the displacement risk caused by a single high-temperature step. Flipping and transfer are carried out on the fixture throughout, avoiding damage to uncured glue and aligned fibers from manual handling.
5. High-precision Alignment and Positioning
Alignment and positioning are the foundation of line accuracy. The equipment uses a high-precision alignment mechanism to keep fiber arrangement and optical-path alignment consistent, so downstream coupling can be carried out stably. Together with automatic fixture flow and fully automated operation, the line improves efficiency while reducing labor. Shenzhen Xingte Technology Co., Ltd. can provide line solutions for different FA specifications, helping fiber-array manufacturers improve assembly consistency.
