FIELD: physics.
SUBSTANCE: resonator (1) features optical loss adjusted according to the intensity difference of contradirectional modes and depending on direction of emission propagation. The optical loss is evoked by an optical unit including polarisation element (71), first element (7) with reversible effect on the wave polarisation, and the second element (8) with irreversible effect on the wave polarisation, so that at least one of the two effects is adjustable.
EFFECT: reduced resonator instability.
15 cl, 10 dwg
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