SUNNYVALE, Calif., August 18 -- Finisar Corp., a provider of gigabit fiber optic solutions, has entered into a definitive agreement to acquire privately-held Sensors Unlimited Inc. in Princeton, NJ. Sensors Unlimited supplies optical components that monitor the performance of dense wavelength division multiplexing (DWDM) systems. The company has also developed photodiode array technology based on indium gallium arsenide (InGaAs)-- a cost-effective way to enhance the use of existing bandwidth in DWDM fiber optic networks. Sensors Unlimited will operate as a subsidiary of Finisar. Sensors Unlimited has a lot in common with Finisar, said Jerry Rawls, Finisar's president and CEO. They have been profitable almost from day one, have grown the company without any outside investment, and produce products that are technically superior to anything else in the market.