Download or read book High Speed Modulation Characteristics of Semiconductor Nanolasers and Coupled Ring Laser Systems written by Chi Xu and published by . This book was released on 2021 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical communication systems require light sources that can be modulated with high speeds. However, the modulation bandwidth of laser diodes is typically limited by an intrinsic value, its relaxation resonance frequency. In order to circumvent this limitation, a number of methods have been proposed to boost the modulation speed, including optical injection locking, quantum dots lasers with large differential gain, push-pull modulation in composite lasers. This dissertation explores two new approaches for enhancing the direct modulation bandwidth of semiconductor quantum well laser diodes.