1.3 microm quantum dot laser in coupled-cavity-injection-grating design with bandwidth of 20 GHz under direct modulation

Opt Express. 2008 Apr 14;16(8):5596-601. doi: 10.1364/oe.16.005596.

Abstract

Using a multi section laser in coupled cavity injection grating design based on 1.3 microm InGaAs/GaAs quantum dot (QD) active region we were able to enhance the 3 dB modulation bandwidth well beyond the inherent material modulation bandwidth. The material bandwidth was determined by measurements on distributed feedback (DFB) devices to approximately 8 GHz. The special multisectional design allows interaction between the lasing mode and a second mode used as catalyst and enables a high resonance frequency of the device. Based on active QD material this approach allowed us to reach a cut off frequency of 20 GHz in the small signal response of the device.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Arsenicals / chemistry*
  • Computer Simulation
  • Computer-Aided Design
  • Equipment Design
  • Equipment Failure Analysis
  • Gallium / chemistry*
  • Indium / chemistry*
  • Lasers, Semiconductor*
  • Models, Theoretical
  • Quantum Dots*
  • Quantum Theory
  • Refractometry / instrumentation*
  • Signal Processing, Computer-Assisted / instrumentation*
  • Telecommunications / instrumentation*

Substances

  • Arsenicals
  • Indium
  • gallium arsenide
  • Gallium
  • indium arsenide