Enhanced excess noise in laser cavities with tilted mirrors

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Enhanced excess noise in laser cavities with tilted mirrors
( Q3 X% W6 x$ u$ b, nStefano Longhi
* \/ B: k. M6 I
! l+ p, M1 H& V  {9 C, cOptics Letters, Vol. 25, Issue 11, pp. 811-813
) j/ r! u! N0 U  ?6 w
3 I8 q8 S* O* uKeywords (OCIS):
(140.3410) Lasers and laser optics : Laser resonators
! x0 E- R4 ~; T(140.4780) Lasers and laser optics : Optical resonators
* g% B3 Z& m7 i! W7 N(270.2500) Quantum optics : Fluctuations, relaxations, and noise


" G' {& c3 X0 W7 `Abstract
' B9 {* A1 S  [6 {* V  M- B6 h% WEnhancement 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.