1 Department of Photonics Engineering, Technical University of Denmark2 Ultrafast Nonlinear Optics group, Department of Photonics Engineering, Technical University of Denmark3 Shanghai University4 Shanghai University
We theoretically analyzed the gain characteristics of an integrated semiconductor quantum dot (QD) fiber amplifier (SQDFA) by using a 2×2 tapered fiber coupler with a PbS QD-coated layer. The asymmetric structure of the fiber coupler is designed to have a maximum working bandwidth around 1550-nm band and provide a desired optical power ratio of the output signals. By using 600mW of 980-nm pump, 10dB gain of a 1550-nm signal is estimated with the gain efficiency of 4.5dB/cm.
Optical Fiber Technology, 2013, Vol 19, Issue 2, p. 143-147