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  • Srico to Develop Optical Modulators
Sep 2005
COLUMBUS, Ohio, Sept. 7 -- Srico, a Columbus-based photonics company, was awarded a $750,000 Phase II Small Business Innovation Research (SBIR) contract to continue development for the US Air Force of an ultrahigh dynamic range modulated optical source based on a compact Mach-Zehnder interferometer (MZI) intensity modulator.

Modulators, which are key components in optical communication and sensor networks, turn light on and off to encode the information being sent through a network.

During the SBIR Phase I preliminary development, Srico said it set a world-record 66-dB extinction ratio for an optical modulator, a ratio of about 4 million to 1. The modulator device is capable of integration onto a larger optical chip containing 256 channels. The company said the technology developed for this SBIR program will be used to develop commercial electro-optic modulator components with very high extinction ratio and low drive voltage that operate over a broad spectral range.

Sri Sriram, president and founder of Srico, said the contract will enable Srico to develop a unique platform technology for surveillance activities.

Srico makes integrated optical waveguide components and optoelectronic subsystems for communication and sensor networks. Its products incluce electro-optic modulators, optical wavelength switches, analog fiber optic links, and photonic sensors that detect and measure electric field, current and voltage.

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mach-zehnder interferometer
Derived from the Twyman-Green interferometer, the Mach Zehnder is an amplitude splitting interferometer that consists of two beamsplitters and two fully reflecting mirrors. Light from an extended source passes through the first beamsplitter resulting in two lightwaves traversing equal and separate optical paths. The two paths are later recombined with a set of mirrors at a second beamsplitter in which the resultant beam is then passed to an observation plane where interference fringes are...
The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
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