The Y91 incorporates core alignment technology with six motors, enabling superior precision in fiber optic splicing. This configuration ensures very low typical losses during splicing—approximately 0.02 dB for single-mode fibers and 0.01 dB for multimode fibers.
With its compact design (34 × 31 × 43 cm) and light weight (approximately 2.45 kg including battery), the Y91 is optimized for use in both field and manufacturing or installation environments. Its robust construction and easy transport allow for quick setup on construction sites or in outdoor installations.
The device features a 5-inch color LCD screen that is intuitive and easy to read, compatible with touch controls and a physical keyboard. It also includes a multilingual menu for easy operation in different markets.
Automated program test function, which adjusts arc parameters according to the fiber type and allows saving up to 200 stored programs for a variety of fibers.
Independent operation with rechargeable battery, with clear charge indicators and autonomy for multiple splicing cycles and heating by charging.
Reversible screen mode and adjustable LED light to improve visibility in low light conditions.
The Y91 comes with a complete set of essential accessories for fiber optic splicing, including a Y17 precision fiber cutting tool, cooling tray, battery holder, power adapters, and carrying case.

