Slide 1OverviewGaussian BeamCoupling EfficiencyCoupling Efficiency Contd.LossesLongitudinal MisalignmentAngular MisalignmentLateral MisalignmentCurrent technologyArray Waveguide Grating PLCSlide 12Drawbacks of Hill-ClimbingHill climbing Vs Smart AlgorithmSmart AlgorithmConclusionCOUPLING EFFICIENCY FOR SINGLE MODE FIBERS AND FIBER-OPTIC ALIGNMENT AUTOMATION A PRESENTATION BY:Shubham [email protected]• Gaussian Beam analysis• Losses (Intrinsic and Extrinsic)• Mechanical misalignments (Lateral, Longitudinal and Angular)• Fiber-optic alignment automation• Hill-climbing algorithm• Drawbacks of hill-climbing algorithm• A proposed novel feed-forward controlling algorithm• ConclusionOverviewGaussian BeamSource wave function Modal wave functionCoupling Efficiency== Total efficiencyPower- Coupling efficiencySource EfficiencyCoupling Efficiency Contd.LossesLOSSIntrinsic losses• NA effects• Fiber-radius effects• Index-Profile effects• Core concentricity within cladding• Fabrication tolerancesExtrinsic losses• Lateral Misalignment• Longitudinal Misalignment• Angular MisalignmentReflection lossesLongitudinal MisalignmentAngular MisalignmentLateral MisalignmentCurrent technology6 DEGREES OF FREEDOMArray Waveguide Grating PLCFiber-Fiber Alignment AutomationDrawbacks of Hill-ClimbingCutting off at Local MaximaHill climbing Vs Smart AlgorithmHill climbing algorithmSmart AlgorithmSmart AlgorithmConclusion• Longitudinal misalignment is less critical than angular and lateral misalignment.• Dominant loss arises from lateral displacement in single mode fibers.• Hill-climbing algorithm is time-consuming and has the potential drawback of missing the actual peak.• A novel Algorithm using a feed forward controlling technique is proposed which takes care of the disadvantages of hill climbing