Lumibird Lumibird (formerly known as Quantel-Keopsys Group) is a company that designs, manufactures, and markets laser components. | ![]() Quantum Semiconductor International Quantum Semiconductor International (QSI) is a manufacturer of the laser diode. | |
Founding Date | Founding Date 1970 | Founding Date 2000 |
Type | Type Public | Type Public |
Tags | ||
Locations | Locations Lannion, FR HQ Ottawa, CA Shanghai, CN Cesson Sévigné, FR Cournon D'auvergne, FR Le Barp, FR Rennes, FR see more | Locations Cheonan, KR HQ |
Employees | Employees 1,027 | Employees 124 |
Financial | ||
Revenue (est.) | Revenue (est.) €225.6m (FY, 2025) | Revenue (est.) ₩29.4b (FY, 2021) |
Cost of goods | Cost of goods €82.3m (FY, 2025) | Cost of goods ₩21.4b (FY, 2021) |
Gross profit | Gross profit €147.7m (FY, 2025) | Gross profit ₩8b (FY, 2021) |
Net income | Net income €14m (FY, 2025) | Net income ₩1.6b (FY, 2021) |

Quantum Semiconductor International (QSI) is a manufacturer of the laser diode.
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