|  | 09/07/2004 |
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Furukawa Electric to Develope Vertical Cavity Surface Emitting Laser
Furukawa Electric, Japanese major electric material maker, announced on Thursday the firm developed the Vertical Cavity Surface Emitting Laser (VCSEL) which has 1,300 nano-meter wavelength belt, of chip or module for high-speed mass communication, and is the first in a country. By the application of the new material which the company invented, the firm attained the wavelength characteristic equivalent to a device conventionally. Simultaneously, it was realized the tip cost of the conventional ratio about 1/10 and the micro-ization of the module. The firm will do a mass-production start in 10,000 pieces in every year from the 2005 fiscal year, and will aim to produce at this 100,000-piece in the 2006 fiscal year.
VCSEL is the Japan device which Emeritus Professor Kenichi Iga of Tokyo Institute of Technology invented. Although the usual semiconductor laser takes out light from the side of a substrate, VCSEL is taken out from the substrate surface. It is already put in practical use with the 850nm wavelength belt.
Distribution return type (DFB) laser made from gallium-indium-arsenic-Phosphorus has been used for the light source laser for the conventional optical-communications wavelength (1,300 - 1,550nm belt). However, if this material is used for the activity layer of VCSEL, the optical output or the temperature characteristic which are sufficient for practical use cannot be acquired.
the firm developed the gallium-indium-nitrogen-arsenic-antimony of new material in this time. It succeeded in flatness-izing the film of an activity layer and improving crystal quality by addition of antimony. The optical output corresponds to maximum minus 3dBm, and access speed corresponds to 2.5giga bps.
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 | Furukawa Electric to Develope Vertical Cavity Surface Emitting Laser
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