Titlebook: Optical Resonators; Fundamentals, Advanc Norman Hodgson,Horst Weber Book 19971st edition Springer-Verlag London 1997 Polarisation.diffracti

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The Fabry Perot Resonator. Steady state means that both the amplitude and the phase reproduce themselves after one round trip. It is easy to understand that both conditions can only be accomplished if the resonator length is an integral multiple of half the wavelength. Only in this case can we obtain standing waves inside t

Inertia

Stable Resonatorsctive medium inside the resonator and assume that both resonator mirrors exhibit 100% reflectance at the wavelengths considered Resonators that do not provide amplification of the light are called passive resonators. Although the active medium is required to generate laser emission, the concept of t

GREG

Resonators on the Stability Limitseam go to zero or infinity. On the stability boundaries, the Gaussian beam is not an eigensolution of the resonator. The field distributions of the eigenmodes are still solutions of the diffraction integral equation (5.66), but the mode structure and the diffraction losses have to be calculated nume

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Unstable Resonatorsd by a Gaussian beam. Equation (5.10) indicates that in these cases the Gaussian beam radii become complex quantities. The steady state field distributions are not given by Gauss-Hermite or Gauss-Laguerre polynomials. These resonators are referred to as . [3.54,3.67], whereby the term “unstable” acc

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Resonators with Internal Optical Elementsors are chosen close to a stability limit in the g-diagram. In both cases a large fundamental mode volume and, consequently, a high efficiency are obtained. In order to avoid a high misalignment sensitivity or a long resonator set-up, lenses can be used inside the resonator to enlarge the Gaussian b

Interregnum

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Influence of Gain on Mode Structure and Lossacterized by an effective cross sectional area .. resulting in a fill factor γ =../., with . being the cross sectional area of the active medium. The question we want to answer in this Chapter is how the beam cross section has to be defined to get a realistic expression for the output power of a las

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