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Etalon filter offers design flexibility in tunable lasers

Posted: 02 Nov 2009     Print Version  Bookmark and Share

Keywords:etalon filter  laser  optic fibre 

Kyocera Corp. has developed a crystal etalon filter that prevents dense wavelengths of light from interfering with each other by sensing deviations between multiple wavelengths. The crystal etalon filter that allows users to select a wavelength temperature coefficient within the range of 5.4 to 15.7pm/°C.

With the Internet's rapid expansion in recent years and the drastic increase in volume of information transfer from the exchange of large-volume data such as movies, optical telecommunications now face demand for handling a greater volume at a higher speed. The WDM transmission system, with its capacity to send more optical signals per single optical fibre, is becoming the mainstream method of meeting such demands. Tunable laser modules are developed in a range of configurations to further increase optical signals, leading to the need for crystal etalon filters, which possess wavelength temperature coefficient ranging from low to high and are optimal for any configuration.

The new product was created by Kyocera Kinseki with the company's advanced technology for analysing at sub-pm levels (1×10-12metres or smaller), data on optical characteristics accumulated over years of research, and its technology for developing high-definition, high-quality synthetic crystals.

This development enables more flexibility in designing tunable laser modules capable of increasing optical signals emitted with higher precision, better wavelength stability and reliability.

Samples are now available in two types with greater (15.7pm/°C) and smaller (5.4pm/°C) wavelength temperature coefficient. They can also provide samples to accommodate a specific temperature coefficient.

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