Title :
Spontaneous spatiotemporal instabilities in current modulated master oscillator power amplifier lasers
Author :
Moloney, J.V. ; Egan, A. ; Ning, C.Z. ; Indik, R.A.
Author_Institution :
Math. Sci. Center, Arizona Univ., Tucson, AZ, USA
Abstract :
We provide the first comprehensive theoretical evidence for nonlinear space-time dynamical behavior which seriously degrades the performance of a monolithically integrated master oscillator power amplifier laser under direct current modulation of the master oscillator. A host of instabilities, reflecting dynamical behavior of different sections of the device, are possible. These instabilities are due to the combination of weak feedback from the power amplifier section of the device causing leakage into the master oscillator section, from the buildup of unsaturated carriers along the narrow edges of the expanding flare and differential saturation of the passive regions under the distributed Bragg reflector grating sections.
Keywords :
distributed Bragg reflector lasers; electro-optical modulation; laser stability; laser theory; nonlinear optics; semiconductor device models; semiconductor lasers; DBR laser diodes; comprehensive theoretical evidence; current modulated master oscillator power amplifier lasers; differential saturation; direct current modulation; distributed Bragg reflector grating sections; dynamical behavior; instabilities; leakage; master oscillator; master oscillator section; monolithically integrated master oscillator power amplifier laser performance degradation; nonlinear space-time dynamical behavior; passive regions; power amplifier section; spontaneous spatiotemporal instabilities; unsaturated carrier build up; weak feedback; Degradation; Differential amplifiers; Distributed Bragg reflectors; Distributed amplifiers; Laser feedback; Laser theory; Oscillators; Power amplifiers; Power lasers; Spatiotemporal phenomena;
Journal_Title :
Photonics Technology Letters, IEEE