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Company profile

Yelo

Designs and manufactures laser-diode burn-in, life-test and measurement equipment in Carrickfergus.

Company overview

Yelo designs and manufactures test equipment, including dedicated systems for assessing semiconductor laser-diode reliability. Its photonics portfolio covers burn-in, life testing and light-current-voltage measurements, alongside broader automated production-test fixtures and racks. The Y2000H system supports high-power laser devices, with controlled electrical, thermal and optical measurements and configurations for different device packages. The company describes support for chip-on-carrier, chip-on-substrate and laser-bar formats, establishing specialised semiconductor-device testing. Its published brochure identifies telecommunications, data centres and industrial applications as markets for the laser diodes being tested. Yelo was formed in 1983, and its current company brochure gives a Carrickfergus address at Trooperslane Industrial Estate. This establishes a Northern Ireland operation supplying testing equipment for photonics manufacturers, without attributing laser-chip fabrication to the company.

Semiconductor activity

Primary capability: Test / Probe Equipment. Supply-chain role: Test equipment manufacturing, Test solutions.

Technologies and capabilities

  • Laser-diode burn-in
  • Reliability life testing
  • Light-current-voltage measurement
  • Automated test equipment

Laser-diode burn-in systems; Laser-diode life-test systems; LIV measurement equipment; Y2000H high-power test system; Custom test fixtures and racks

Markets served

  • Telecommunications
  • Data centres
  • Industrial lasers

UK presence

25,000 square foot manufacturing facility in County Antrim. Part of the Northern Ireland cluster.

Research links: Invest NI.

Sources and verification

Last verified: 2026-10-19