Slowing Light Using Quantum-Dot Laser Amplifiers

• Main Author: 劉瑞農
• Other Authors: 郭浩中
• Format: Others
• Language: en_US
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/93418305290619025201

碩士 === 國立交通大學 === 光電工程系所 === 96 === This thesis explores the novel use of semiconductor lasers as optical delay lines. Slowing light using vertical-cavity surface-emitting lasers (VCSELs) is explained and simulated using the VCSEL amplifier model. Simulated results and experimental result are qualitatively in a good agreement. With the aid of the filter phase analysis, the simulations explain that group delay increases with increased modal gain and decreases with increased modulation frequency. Besides, the simulations predict the VCSEL’s capability of delaying single-tone sinusoidal signal of 1 to 5 GHz. On the other hand, RF delay or optical delay using injection-locking of VCSELs is studied experimentally in the thesis. Optical spectra show that the VCSEL is not in the stable-locking range. The VCSEL acts as a regenerative amplifier, making one of the signal side band much larger than the other.