Quantum Electronics and Coherent Light

absorption amplitude approximation assume atoms beam broadened calculation cavity cm-¹ coefficient coherent components conduction band configuration confocal corresponding density density matrix diode dipole E₁ electric electromagnetic electron emission line emitted energy levels equations etalon excited exciton experimental Fabry-Perot factor fluorescent Fourier frequency shift function GaAs given harmonic infra-red integral intensity interaction interferometer inversion ions Journ laser action Lett light line width linear magnetic field maser matrix element measurement mirrors modes molecular molecule N₁ N₂ noise nonlinear obtained operation optical oscillator parameters phase photon Phys plane polarization pumping quantum Raman effect rare-earth region resonance ruby scattering semiconductor shown in Fig spectra spectrum spontaneous emission stimulated emission stimulated Raman Stokes symmetry temperature theory threshold tion transition valence band vector velocity vibrational vibronic w₁ wave wavelength ΔΩ