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

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Presentation on theme: "Building a Continuous Wave Erbium Doped Fiber Laser and Amplifier Ben Baker Kristen Norton."— Presentation transcript:

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- μ m region = where telecom fibers have loss min requirements gain medium = fiber with erbium ions (Er 3+ ) heavy doping CW pump signal/feedback

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4 Erbium absorption/emission

5 Emission Spectrum depends on how broad energy levels are proximity of other Er ions diode lasers vs fiber lasers spontaneous emission vs feedback & gain

6 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

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8 EDFA no feedback, amplifying another signal measure all output power

9 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

10 How?? Power meter, oscilloscopes Monochromator, diffraction grating

11 Loop power

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13 Output power

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17 signal = all fiber pulsed EDFL

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19 signal = Jared and Wesley’s soliton EDFL

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