Injection locking in distributed feedback semiconductor lasers

Abstract

Abstract-Injection locking properties of distributed feedback semiconductor lasers are studied systematically. Due to the high side mode suppression, these devices show different locking properties when compared to lasers having Fabry-Perot structures. The main result is the identification of four regimes for different injection levels. In particular, a symmetrical locking band at low optical injection level is confirmed. The presence of this symmetrical band can be exploited in some applications: as examples, the measurement of the linewidth enhancement factor a and the PSK modulation capability are reported.

Bifurcation transitions in an optically injected diode laser: theory and experiment

“…Full and open diamonds at negative detuning mark the boundaries of a region of bistability between the locked steady state and a periodic orbit (associated with four-wave mixing). This bistability phenomenon was observed in [7] and then it was studied numerically in [8], but the authors did not recognise the underlying bifurcation mechanism. This motivated the asymptotic analysis in [9], which revealed the existence of a torus bifurcation curve for negative detunings.…”

Radio Frequency Photonic Synthesizer

“…Phase noise of injection-locked lasers has been the subject of intensive previous study [20,21,22,23,24,25,26,27,28,29]. It was found that the slave laser phase follows only the phase fluctuations of the master laser, so the slave laser linewidth will be equal to the linewidth of the master laser, independent of the output power of the slave laser.…”

“…Pulsations induced by optical injection have also been found to yield information about the important coupling between amplitude and phase of the electric field in a semiconductor laser. In fact, a method was developed to measure the laser linewidth enhancement factor a using injection locking techniques [29].…”

Optical and Electrical Spectrum Analysis of Optoelectronic Devices

“…In previous works, different kinds of semiconductor optical injected lasers have been investigated (Hui et al, 1991;Chang et al, 2003;. However, the investigations were mainly concerned about single-beam injected lasers.…”