CHROMATIC DISPERSION DISTRIBUTION MEASUREMENT ALONG A SINGLE-MODE OPTICAL-FIBER

A nondestructive measurement technique, which uses a four-wavelength b idirectional optical time domain reflectometer (OTDR) to measure the c hromatic dispersion distribution along a single-mode fiber, is compare d with the destructive interferometric technique, The experimental res ults obtained by this technique are in good agreement with those obtai ned by the interferometric technique, In addition, a measurement proce dure is proposed for a transmission line composed of different types o f single-mode fiber, These results show that this technique is extreme ly useful for the design of wavelength division multiplexer (WDM) and finite difference multiplexer (FDM) optical communication systems.