The company provides a range of products, including direct modulation laser transmitters, high speed detectors, fiber laser pumps and components, fiber amplifier pumps and components, and acousto optic modulators. It also offers outsourced sub-micron integration and packaging services. EM4, Inc. serves the defense, aerospace, life science, CATV, telecommunication, and industrial markets with both off-the-shelf products and custom design and manufacturing services. The company is ITAR registered and based in the United States.