Santur Corporation
Open-knowledge reference entry
Santur Corporation developed, manufactured and commercialized tunable lasers as well as parallel array devices and photonic integrated circuits for the telecommunications industry. It was established in November 2000 in Fremont, California initially developing and commercializing the tunable lasers for metro and long-haul dense wavelength-division multiplexing (WDM) systems. The company had a patented a Distributed Feedback Laser (DFB)-array technology, which enabled the manufacture of broadly tunable sources that have the same performance and reliability as fixed DFBs. Santur claimed to have set a new standard in the telecommunications industry with its technology that features a unique combination of high power, wide tunability, stability, Telcordia GR-468 reliability, and value.
NeoPhotonics, a California-based company that develops, manufactures, and sells optoelectronic products, acquired Santur in 2011 for $39.2 million. The acquisition allowed NeoPhotonics access to Santur's 40 and 100 Gbit/s products. As the long-distance fiber optics technology has moved to coherent modulation techniques and laser linewidth has become more important, the Santur design of a DFB array with a MEMS mirror has been discontinued in favor of an external cavity tunable laser that was developed by NewFocus, Intel, and then Emcore, and acquired by Neophotonics in 2014.
Tunable laser technology
Santur Corporation's development of tunable lasers was considered timely, as wavelength-division multiplexing (WDM), or adding multiple lanes at different colors into the same fiber for increased capacity was gaining popularity in long haul and metropolitan fiber optic links. A tunable laser could function at any wavelength, eliminating the cost of manufacturing and the logistics of maintaining up to 80 different parts. This is the case since tunability offers a more flexible and less costly operation.
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