Subharmonic Entrainment of Avalanche Oscillations Through Optical Terminals

Abstract

In optical subharmonic entrainment, the locking signal, having a frequency close to a subharmonic of the free running oscillator frequency, takes the form of an amplitude modulation of an optical carrier which is coupled to the avalanche diode. Based on the field theoretic approach, the paper presents a numerical analysis of optical subharmonic injection locking of an avalanche diode oscillator. It brings out some important features of optical subharmonic entrainment such as optimum locking conditions, dependence of locking range on the laser modulation depth, locking asymmetry etc.

Indexing terms:

• Avalanche oscillators
• Subharmonic entrainment