The performance of tunable buffers based on optical amplifiers and its improvement by use of gain flattening are analyzed. A simple analytical expression is obtained indicating that the gain required to attain tunable storage of N bits increases nonlinearly with N and reaches unrealistically high values for N>5. A comparison with other types of optical delay line is made.
© 2006 Optical Society of America
Original Manuscript: October 21, 2005
Manuscript Accepted: December 9, 2005
Jacob B. Khurgin, "Performance limits of delay lines based on optical amplifiers," Opt. Lett. 31, 948-950 (2006)