The Effect of Temperature and Laser Type on Optical Fiber Temperature Coefficient

摘要

Optical fibers are widely used in communication and information systems. This needs studying the factors that affect signal quality. In this work and optical fibers having two different laser beams passing through it were exposed to heat by raising temperature from 30℃ to 50℃ in steps of 2℃. The empirical relation shows linear increase of attenuation coefficient with temperature. This linear relation can shows that the temperature sensitivity of semiconductor and He-Ne laser are 0.01 and 0.4 respectively. This means that using He-Ne laser in transmitting information is better than semiconductor laser because the former is less sensitive to temperature. It also shows that semiconductor laser is suitable to make fiber act as temperature sensor, since its sensitivity is high.