Enhanced excess noise in laser cavities with tilted mirrors

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Enhanced excess noise in laser cavities with tilted mirrors
$ a3 D; K- L- G/ H% ~; }/ fStefano Longhi
2 A8 P! {( h& o9 w/ ]4 Y
Optics Letters, Vol. 25, Issue 11, pp. 811-813

Keywords (OCIS):
(140.3410) Lasers and laser optics : Laser resonators
(140.4780) Lasers and laser optics : Optical resonators
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
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6 J1 K0 L, o" CAbstract
, j% o: z$ w7 o2 m* ^Enhancement of the transverse excess-noise factor is theoretically predicted in optical laser cavities with tilted end mirrors and nonuniform transverse loss. In particular, it is shown that in a loss-guided laser close to the plane--plane geometric instability boundary the excess-noise factor that is induced by mirror tilting may largely exceed that predicted for the aligned cavity. This excess noise is related to beam walk-off induced by mirror tilting, which makes possible transient amplification of noise in the transverse plane.