Temperature-compensating device with central-wavelength tuning for optical fiber gratings

The demand for fiber Bragg gratings (FBG) for use in optical transmission devices has grown exponentially in the telecommunication industry. A stable temperature compensation mechanism is essential to the successful use of FBG-based devices. In this paper, a tubular temperature-compensating package with a tunable component is described. Such a mechanism serves for posttuning the fixture in order to obtain a designed central wavelength. With the aid of the developed experimental procedure, this compact and easily manufactured package can achieve a temperature coefficient of 8.3 x 10(-4) nm/degreesC in the temperature range from -40 to 80 degreesC. The same package can also be used for multi-PEG applications. (C) 2001 society of Photo-Optical Instrumentation Engineers.