Improvement of slow light performance for vertical-cavity surface-emitting laser using coupled cavity structure

• Published in: Optoelectronics letters Vol. 8; no. 6; pp. 405 - 408
• Main Author: 马雅男 罗斌 潘炜 闫连山 邹喜华 易安林 叶佳 温坤华
• Format: Journal Article
• Language: English
• Published: Heidelberg Tianjin University of Technology 01-11-2012
• Subjects: Lasers; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; VCSEL; 光性能; 半导体; 垂直腔面发射激光器; 带宽和; 耦合腔; 腔结构; 超高斯信号; Resonant Wavelength; Stimulate Brillouin Scat; Passive Cavity; Flat Gain; Wideband Spectrum
• ISSN: 1673-1905; 1993-5013
• DOI: 10.1007/s11801-012-2302-x

We propose a vertical cavity semiconductor emitting laser （VCSEL） using a coupled-cavity （CC） design to broaden the bandwidths of gain and delay spectra. The structure is formed by constructing a passive cavity coupled with the active cavity. By rendering the strength of the two resonant cavities, the increased gain bandwidth by 340% and the increased delay bandwidth by 800% are achieved as compared with the signal-cavity （SC） VCSEL. The wideband spectra present more square-like passband which is expected for slow light system. By using it, a 20 Gbit/s super Gaussian signal is delayed by about 13 ps with high quality.