Abstract
In this chapter, we describe techniques used to operate lasers as continuous wave lasers or as pulsed lasers—in the next chapter we will treat femtosecond lasers.
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Problems
Problems
12.1
Resonance condition for a planparallel plate. Derive the resonance condition (12.1) for a planparallel plate. [Hint: Determine the difference of the optical path of a beam directly reflected at the surface of the plate and a beam reflected at the backside of the plate.]
12.2
Michelson interferometer. A Michelson interferometer operates with a parallel laser beam (wavelength \(\lambda = 580\) nm; \(P_0\) = power of the laser radiation).
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(a)
Calculate the intensity I(x) at the detector for a length difference x when one arm has the length L and the other arm the length \(L + x\).
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(b)
Determine the path difference \(\delta x\) for values of x in the interval \(x_0 \le x \le x_0+\lambda \) for \(x_0 = 1\) km that leads to the largest signal-to-noise ratio for the signal.
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(c)
Estimate the change of the signal if one of the arms changes its length by \(\delta L/L = 10^{-15}\) and the other arm by \(\delta L/L = -10^{-15}\). [Hint: The beam splitter in the Michelson interferometer splits an incident electromagnetic field into two fields.]
12.3
It is possible to reduce suddenly the reflectivity of the output mirror of a laser . Show, qualitatively, that this “cavity dumping” results in a much stronger laser pulse than without cavity dumping.
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Renk, K.F. (2017). Different Ways of Operating a Laser. In: Basics of Laser Physics. Graduate Texts in Physics. Springer, Cham. https://doi.org/10.1007/978-3-319-50651-7_12
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DOI: https://doi.org/10.1007/978-3-319-50651-7_12
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Publisher Name: Springer, Cham
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Online ISBN: 978-3-319-50651-7
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