PRINCETON, N.J., Oct. 8 -- Sensors Unlimited, developer of indium gallium arsenide (InGaAs) technology, has announced it will purchase certain assets and accept certain liabilities from Finisar Corp.'s Sensors Unlimited subsidiary for $6.1 million in cash. The new company will assume the name Sensors Unlimited, and the existing management team and employees will be retained, the company said. By returning to an employee-owned, privately-held company, Sensors Unlimited said it can focus on its core markets -- military, industrial spectroscopy and telecommunications. 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