Self-Injection-Locked Magnetron as an Active Ring Resonator Side Coupled to a Waveguide With a Delayed Feedback Loop

Abstract

The theoretical analysis and numerical simulations of the magnetron operation with a feedback loop were performed assuming that the delay of the electromagnetic wave propagating in the loop is constant whereas the phase of the complex feedback reflection coefficient is varied. Results of simulations showed that by a proper adjustment of values of the time delay and phase of reflection coefficient that determines phase matching between the waves in the resonator and feedback loop, one can increase the magnetron's output power significantly without any other additional measures.

Optimization of Laser Frequency Stabilization via Self-Injection Locking to WGM Microresonator

“…In contrast with the common knowledge, the increase of the backscattering, described by the parameter β, does not monotonously enhance the stabilization coefficient (7), but leads to its eventual saturation. The optimal selection of the system parameters results in reduction of the laser linewidth by several orders of magnitude.…”

“…We checked the analytical results and studied the nonzero κ m τ s case numerically using (7). For a relatively large distance between the laser and the microresonator (κ m τ s > 0.1) the overcoupled regime is optimal at larger forward-backward coupling coefficient values (see Fig.…”

“…Substituting ζ = 0 to the expression (7) we get b = 0. Substituting this result into the expression for the optimal phase (13) we find that ψ opt = 0 (see Fig.…”

“…Self-injection locking phenomenon is one of profound effects observed in oscillatory circuits. For many years this effect has been used in Radio-Physics, Radio-Engineering and Microwave Electronics with the goal to improve the spectral purity of the devices [1][2][3][4][5][6][7][8][9][10][11]. It also has been widely applied for stabilization of laser sources enabling various practical applications, including high resolution spectroscopy and high-precision metrology.…”

Numerical study of solitonic pulse generation in the self-injection locking regime at normal and anomalous group velocity dispersion

“…The effect of the self-injection locking (SIL) is well-known for many years in the theory of oscillations, radiophysics and optics and is actively used for the stabilization and spectral purification of the corresponding generators [1][2][3][4][5][6]. In optics it allows to obtain sub-kHz or even sub-Hz generation linewidth using compact semiconductor lasers locked to high-Q optical microresonators [7][8][9][10][11][12][13][14], e.g.…”