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Course: ECE 311, Fall 2010School: Purdue
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Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
14 15. For the transmission line shown below, O/4ZinZo = 50 :100 :(10pts) The input impedance Zin is (a) 10 : (b) 100 : (c) 50 : (d) 5 : (e) f (f) 0 : (g) None of the above(10pts) The reflection coefficient * at the load is (a) (b) (c) (d) (e) (f) 0
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 311
Purdue - ECE - 414
Purdue - ECE - 414
Purdue - ECE - 414
Purdue - ECE - 414
ECE 414 HW #1 Due: 1-25-2011 1. You are at an aquarium, looking down at an angle of 15 through 2 rows of tanks one containing reptiles (in air), and the other containing fish (in water). Both types of tanks are made of glass (n = 1.5). As shown in the pi
Purdue - ECE - 414
Purdue - ECE - 414
ECE 414, Spring 2011 Homework #2 Out: 02/03/2011 Due: 02/08/2011 (1) Review of uniform plane waves The electric field of a uniform plane wave is writtenWith E in volts/meter, t in second, z in meters. Give the following: 1. 2. 3. 4. 5. 6. the the the the
Purdue - ECE - 414
Purdue - ECE - 414
ECE 414 Homework 3 1. Due Feb. 22, 2011 2. 3. 4. 5. 2 By defining the beam radius as: w 2 (z) = w0 [1 + ( !z 2 ) ] , the radius of curvature as 2 " w0R(z) = z[1 + ( 2 2 ! w0 2 ! w0 ) ] , and location of minimum beam radius at p
Purdue - ECE - 414
Purdue - ECE - 414
Purdue - ECE - 414
ECE 414, Spring 2011 Homework #5 Out: 03/10/2011 Due: 03/22/2011 (1) In the diagram shown below, the pump P2 (i.e., electrons, flash lamp, another laser, etc.) excites atoms from state 0 to state 2, nothing to state 1. To make the problem simple and tract
Purdue - ECE - 414
Purdue - ECE - 414
ECE 414, Spring 2011 Homework #6 Out: 03/29/2011 Due: 04/05/2011 EXERCISE 17.1-4
Purdue - ECE - 414
Purdue - ECE - 414
ECE 414 Homework #7 Out: Thursday, April 14th, 2011 Due: Thursday, April 21st, 2011
Purdue - ECE - 414
Purdue - ECE - 414
SEMICONDUCTOR LIGHT SOURCESBasic parameters of semiconductor light sources Light emitting diodes Semiconductor injection lasers Material considerations and fabricationBAND STRUCTUREElectronic band structure - ranges of energy that an electron is "forbi
Purdue - ECE - 414
SEMICONDUCTOR LIGHT SOURCESBasic parameters of semiconductor light sources Light emitting diodes Semiconductor injection lasers Material considerations and fabricationSEMICONDUCTORSEnergy bands in Si and GaAsBook: 16.1SEMICONDUCTORSElectrons in the
Purdue - ECE - 414
LASER DIODESInjection laser diodes (ILD): Stimulated emission + Optical feedback LED: Spontaneous emissionLASER DIODE: GAIN COEFFICIENTPeak gain coefficient:Min injection: transparency Attenuation (without injection)LASER DIODE: GAIN COEFFICIENTPeak
Purdue - ECE - 414
Thermal and Photon Detectors Introduction to Photodetectors Quantum Efficiency Photon Detectors Thermal Detectors Noise ConsiderationsPhotodetectors Optical detection Process that converts optical signal to electrical signal Photodetector Too slow t
Purdue - ECE - 414
PIN Diode Electric field (depletion region) Separate photo-generated carriers PhotocurrentPIN Diode Energy-band diagram for a pin photodiodec (m ) 1 . 24 E g (eV)Photovoltaic Detectors Avalanche Photodiode Similar structure to that of a PIN diode
Purdue - ECE - 414
Electro-Optic Modulators and EffectsEO Amplitude ModulatorEO Phase ModulatorIndustry Standards: ThorLabs"Applying an electric field to the crystal induces a change in the indices of refraction (both ordinary and extraordinary) giving rise to an electr
Purdue - ECE - 414
Ultrafast Op+cs 4.12.2011 Con+nued in Fall 2011: ECE 616 What is Ultrafast Op+cs? CW Laser Infinite +me 1 s Not Fast 1 x 10-3 Kinda fast 1 x 10-6 PreKy fast 1 x10-9 - 1 x10-15 ULTRAfast FWHM Ultrafast Op+cs Pulse Characteris+cs Pulse Shaping & Com
Purdue - ECE - 414
WAVEGUIDES How to guide light? Guiding by dielectric boundaries Integrated optics and fiber optics Modes guided by metallic waveguides- Phase and group velocities - Dispersion relation of TE and TM modes Modes guided by dielectric waveguidesReflection
Purdue - ECE - 414
FIBER OPTICSDimension of typical fibers100 m/140 m200/24062.5/125 50/125 85/1259/1259/125UNDERSEA CABLESMilestones of undersea cables 1866 First undersea telegraph cables North America to Europe 17 words/minute, $5/word 1956 First undersea telepho
Purdue - ECE - 414
NANOPHOTONICSNanophotonics : Behavior of light on the nanometer scale or the interaction of light with nanoparticles Examples: Nearfield scanning optical microscopy (NSOM) Surface plasmon optics Metamaterials Nanophotonics: Studying the novel properties
Purdue - ECE - 414
Photonic Crystals: An Introduction What is a photonic crystal? What special optical properties does it possess? How these properties can be understood? Photonic crystal is a one-, two- or three-dimensional periodic dielectric medium with a period of the
Purdue - ECE - 414
Photonic Crystal vs. Conventional WaveguideHigh-index region, TIRLow index regionConventional waveguidePhotonic crystal waveguideWaveguide Line Defectsforbidden by Bloch (k conserved)allowedforbidden by PBG (except for finite-crystal tunneling)Hi
Purdue - ECE - 414
STANDARD FIBERPHOTONIC CRYSTAL FIBERSEA MOUSE: SIMILARITY?Photonic crystal fibersCross sections (A)Ahttp:/www.physics.usyd.edu.au/~nicolae/seamouse.htmlSTACK AND DRAW TECHNIQUE: PCFMacroscopic "preform" with the required periodicityFurnace to sof
Purdue - ECE - 414
Alexandra Boltasseva: NanophotonicsMETAMATERIALSLecture materials provided by V. Shalaev (Purdue)Alexandra Boltasseva: NanophotonicsMotivationMajor breakthroughs are often materials related Stone Age, Iron Age, Si Age,.metamaterials People realized t