CoreOptics designs 10/40/100 Gbps optical networking subsystems for tier-1 networks. Along with sales of optical fiber, the company also makes signal processing technology aimed at lowering error rates in transmission.

Founded in 2001, CoreOptics has taken over $90 million to date. The company is co-based in Nuremberg, Germany and Manchester, New Hampshire, with additional offices in San Jose, Calif.

The source of the the $25 million funding was not disclosed, but CoreOptic’s past backers include T-Com Venture Fund, GIMV, Crescendo Ventures, TVM Capital, High Tech Private Equity, Atila Ventures and Quest for Growth.

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