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Building a Continuous Wave Erbium Doped Fiber Laser and Amplifier

Building a Continuous Wave Erbium Doped Fiber Laser and Amplifier. Ben Baker Kristen Norton. What is a fiber laser?. Why should we care? communications!! long-ranges amplify light in 1.5-μm region = where telecom fibers have loss min requirements

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Building a Continuous Wave Erbium Doped Fiber Laser and Amplifier

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  1. Building a Continuous Wave Erbium Doped Fiber Laser and Amplifier Ben Baker Kristen Norton

  2. What is a fiber laser? • Why should we care? • communications!! • long-ranges • amplify light in 1.5-μm region = where telecom fibers have loss min • requirements • gain medium = fiber with erbium ions (Er3+) • heavy doping • CW • pump • signal/feedback

  3. Erbium absorption/emission http://www.fibercore.com/Fiberpaedia/tabid/84/agentType/View/PropertyID/137/Default.aspx

  4. Emission Spectrum • depends on • how broad energy levels are • proximity of other Er ions • diode lasers vs fiber lasers • spontaneous emissionvs feedback & gain

  5. EDFL • 980 nm diode laser • APC connectors • wavelength division multiplexer • fusion splicing • erbium fiber • removing pump photons • output coupler varies feedback • measure output power • attenuator varies feedback • optical isolator prevents unwanted feedback

  6. EDFA • no feedback, amplifying another signal • measure all output power

  7. Comparing Goals • Characterize EDFL • pump power vs output power • emission spectrum • Characterize EDFA • gain = signal power vs output power • amplification of continuous wave & pulse • emission spectra • spontaneous emission • amplified signal

  8. How?? • Power meter, oscilloscopes • Monochromator, diffraction grating http://www.sciencetech-inc.com/catalog/13/monochromators/9030

  9. Loop power

  10. Loop power

  11. Output power

  12. Output power

  13. signal = all fiber pulsed EDFL

  14. signal = all fiber pulsed EDFL

  15. signal = Jared and Wesley’s soliton EDFL

  16. signal = Jared and Wesley’s soliton EDFL

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