title: Bandwidth improvement for slow light using amplification characteristics of cascaded vertical-cavity surface-emitting lasers.
abstract: A scheme to improve the bandwidth of slow light using cascaded vertical-cavity surface-emitting lasers (VCSELs) is proposed and experimentally demonstrated. In the scheme, a proper adjustment on the gain peaks of two cascaded VCSELs enables the generation of the desired composite gain spectrum, which has flat-top gain and delay profiles with enhanced peak values. By employing the improved gain and delay profiles in a slow light system, a large delay can be achieved within a wider bandwidth. In the experiment, by using two cascaded VCSELs, a tunable slow light up to 135 ps for a 5 Gbits/s pseudorandom binary sequence is demonstrated with relatively low signal distortion.
authors: Center for Information Photonics & Communications, School of Information Science & Technology, Southwest Jiaotong University, Chengdu, Sichuan, China. mayananaa@163.com
authors: Y-N
authors: YN
authors: Ma
authors: B
authors: B
authors: Luo
authors: L-S
authors: LS
authors: Yan
authors: W
authors: W
authors: Pan
authors: X H
authors: XH
authors: Zou
authors: J P
authors: JP
authors: Zhao
authors: N Q
authors: NQ
authors: Li
authors: X K
authors: XK
authors: Liu