»Introduction

Laserdiodes

Diode lasers are key components for almost all photonic systems. Within IPHOBAC it will be proven that sophisticated DBR and DFB semiconductor lasers are capable of generating spectrally pure mm-wave signals up to ultra high frequencies. In particular, IPHOBAC will develop:

• Integrated quantumdot based mode-locked lasers, gene rating millimetre-wave signals at frequencies in excess of 60 GHz with a spectral linewidth less than 10 kHz.
• Integrated dual-mode lasers with a frequency tuning range from 10 to 300 GHz and a low spectral linewidth of about 1 MHz.

Both types of lasers have the possibility to allow external modulation within an Optical Phase Locked Loop (OPLL) to further reduce phase noise.