Title :
Computer control of fiber Bragg grating spectral characteristics using a thermal head
Author :
Gupta, Sanjay ; Mizunami, Toru ; Shimomura, Teruo
Author_Institution :
Dept. of Electr. Eng., Kyushu Inst. of Technol., Kitakyushu, Japan
fDate :
10/1/1997 12:00:00 AM
Abstract :
We present a new technique for arbitrarily controlling the temperature distribution in fiber Bragg gratings (FBG´s) to control their spectral characteristics. A thermal head consisting of a microheater array, driven with computer control signals is used as a controlling device. Various spectral characteristics including a chirped grating and a transmission filter are demonstrated using a single unchirped grating. An effective improvement in response time constant of thermal control was observed on bonding of the fiber grating to thermal head (18 ms), in comparison to that without bonding (40 ms). The measured results did not show any hysterisis. Reliability studies of this technique are also reported. The same technique is further used for the dual wavelength operation of an Er-doped fiber laser
Keywords :
diffraction gratings; fibre lasers; infrared spectra; optical communication equipment; optical fibre communication; optical fibre dispersion; optical fibre testing; optical fibres; telecommunication network reliability; temperature distribution; 18 ms; 40 ms; Er-doped fiber laser; chirped grating; computer control; computer control signals; controlling device; dual wavelength operation; fiber Bragg grating spectral characteristics; fiber grating; hysterisis; microheater array; optical fibre communication; reliability studies; response time constant; single unchirped grating; spectral characteristics; temperature distribution; thermal head; transmission filter; Bonding; Bragg gratings; Chirp; Delay; Fiber gratings; Filters; Optical fiber devices; Temperature control; Temperature distribution; Wavelength measurement;
Journal_Title :
Lightwave Technology, Journal of
