COUPLING EFFICIENCY FOR SINGLE MODE FIBERS AND FIBER-OPTIC ALIGNMENT AUTOMATION A PRESENTATION BY: Shubham Bhat

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Presentation transcript:

COUPLING EFFICIENCY FOR SINGLE MODE FIBERS AND FIBER-OPTIC ALIGNMENT AUTOMATION A PRESENTATION BY: Shubham Bhat

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 Conclusion Overview

Gaussian Beam

Source wave function Modal wave function Coupling Efficiency = = Total efficiency Power- Coupling efficiency Source Efficiency

Coupling Efficiency Contd.

Losses LOSS Intrinsic losses NA effects Fiber-radius effects Index-Profile effects Core concentricity within cladding Fabrication tolerances Extrinsic losses Lateral Misalignment Longitudinal Misalignment Angular Misalignment Reflection losses

Longitudinal Misalignment

Angular Misalignment

Lateral Misalignment

Current technology 6 DEGREES OF FREEDOM

Array Waveguide Grating PLC

Fiber-Fiber Alignment Automation

Drawbacks of Hill-Climbing Cutting off at Local Maxima

Hill climbing Vs Smart Algorithm Hill climbing algorithm Smart Algorithm

Conclusion 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 method.