Radiation emitted by optically coupled lasers

Frequency, phase, and polarization locking of evanescently coupled lasers

“…The fact that imaginary coupling will not yield phase coherence is already known [10]. Our model also explains why we did not observe phase or frequency locking of the two lasers in this case.…”

Stabilization of optically coupled lasers with periodic pumping

“…Surely, the sufficient condition for stability is far from being optimal. To improve it, there are two possibilities: (1) to apply other stability criteria for the linear second order equation, (2) to improve the bounds obtained in Lemma 1. The first way opens as many variants as stability criteria available in the literature (see for instance [9 -11] and their references).…”

Multichannel laser system with phase conjugation and interchannel phase locking by laser gain hologram

“…In this case, a decrease in the radiation exposure of the laser optical elements leads to an increase in their lifetime. The principles for the construction of multichannel laser systems based on the short or long-range coupling between the lasers and the injection of the reference signal for the phase locking of the controlled laser channels can be found in [1].Althought the possibility for the phase locking of solid-state lasers is limited due to significant dynamic optical distortions of the active media at high-power pumping the phase-conjugated lasers are promising for phase locking due to real-time self-compensation of the distortions.Recently, we demonstrated [2] a two-and three-channel holographic Nd:YAG laser system with a parallel coupling between self-phase-conjugate loop laser oscillators. The principal possibility of self-phase locking of these oscillators by four-wave mixing on gain grating written directly in the active laser medium was demonstrated.…”