Improvement of slow light performance for vertical-cavity surface-emitting laser using coupled cavity structure
Ya-nan Ma, Bin Luo, Wei Pan, Lian-shan Yan, Xi-hua Zou, An-lin Yi, Jia Ye, Kun-hua Wen
Optoelectronics Letters ›› 2012, Vol. 8 ›› Issue (6) : 405-408.
Improvement of slow light performance for vertical-cavity surface-emitting laser using coupled cavity structure
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.
Resonant Wavelength / Stimulate Brillouin Scat / Wideband Spectrum / Flat Gain / Passive Cavity
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This work has been supported by the National Basic Research Program of China (No.2012CB315704), and the National Natural Science Foundation of China (No.61101053).
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