Download Semiconductor-Laser Fundamentals by Weng W. Chow, Stephan W. Koch PDF
By Weng W. Chow, Stephan W. Koch
This in-depth identify discusses the underlying physics and operational ideas of semiconductor lasers. It analyzes the optical and digital homes of the semiconductor medium intimately, together with quantum confinement and gain-engineering results. The textual content additionally comprises contemporary advancements in blue-emitting semiconductor lasers.
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It follows that eq. 13) is adequate for most purposes. Nevertheless, the exact roots of eq. , especially when the medium has complex permittivity. c+z(l-g) 2a = z + g (I+:). 15) By using eq. 16) Finally, the amplitude follows directly from eq. e. 17) Thus, complex geometrical optics gives a result that has precisely the same form as eq. 3). 18) with uo(E,O) given by eq. 6). The same is true for an axially symmetric Gaussian beam, and even for Gaussian beams with arbitrary astigmatism. All these cases proceed similarly.
Fig. 1. Two real rays tangent to a circular caustic. 5b) The resulting field outside the caustic therefore takes the form u = A I eik@l + A2eik@ For points inside the caustic, however, a1,2, z1,2, and a a1,2= g, f i Arccosh-, T ~ =,T ~ i m , r v1,2 = ag, f i (a Arccosh! 7) m), where Arccosh(s) = In (s + fi) , and the amplitudes A1,2 are given by A~ = ceini4(a2 - r 2 -1/4 ) , = ce-'3~'4 (a2 - y 2 -1/4 ) . 8) Contours of phase, that is, of v', correspond to radial lines, whereas the amplitude contours are concentric circles.
16) Finally, the amplitude follows directly from eq. e. 17) Thus, complex geometrical optics gives a result that has precisely the same form as eq. 3). 18) with uo(E,O) given by eq. 6). The same is true for an axially symmetric Gaussian beam, and even for Gaussian beams with arbitrary astigmatism. All these cases proceed similarly. 3. TRANSFORMATION OF GAUSSIAN BEAMS IN OPTICAL SYSTEMS It follows from eqs. 20) where the waist lies in the plane z = zo. Together with the additional factor in each of eqs.