ECEG287 Optical Detection Course Notes Part 18: Odds and Ends Profs. Charles A. DiMarzio and Stephen W. McKnight Northeastern University, Spring 2004 April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Image Intensifier Phosphor Detector Photocathode Micro-Channel Plate Note absence of h April 2004 Chuck DiMarzio, Northeastern University

Image Intensifier/Demodulator Phosphor Detector Photocathode Micro-Channel Plate April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Application: DOT Demod Laser P P t t April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Demodulation April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Correlator Barrier Filter NLO Crystal Side View April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Maxwell’s Equations Faraday’s Equation Ampere’s Equation Gauss’s Equations Constitutive Parameters April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Maxwell’s Equations Source-Free Region No r or J Isotropic Medium E Parallel to D Harmonic Functions No Nonlinear Effects April 2004 Chuck DiMarzio, Northeastern University

Getting to the Wave Equation D E Almost everything interesting is here H B April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Vector Wave Equation D E Linear Medium 4 3 1 2 B H April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Scalar Wave Equation D E 4 Linear, Isotropic Medium 3 1 2 H B (Two States of Polarization) April 2004 Chuck DiMarzio, Northeastern University

Second-Harmonic Generation B H B More on this later in the course. April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Classical NLO Model One-D A Tensor model is more appropriate for most non-linear optics work. April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Energy Level Diagrams Detection SHG First-order perturbation is linear in the number of photons. Second-order perturbation is quadratic in the number of photons. April 2004 Chuck DiMarzio, Northeastern University

Chuck DiMarzio, Northeastern University Powers in Correlator dt SHG Power is proportional to product of these two. dt is proportional to q, and is a “slow” function of time. SHG Energy is the time integral of SHG Power. dt time April 2004 Chuck DiMarzio, Northeastern University