Transcript of Modal and Material Dispersion Daniil Y. Gladkov. Outline Hardware Types of Dispersion Data Transfer...
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- Modal and Material Dispersion Daniil Y. Gladkov
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- Outline Hardware Types of Dispersion Data Transfer Function
Future Project Proposals
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- Why does dispersion matter ? Understanding the effects of
dispersion in optical fibers is quintessential in optical
communications in order to minimize pulse spreading. Pulse
compression due to negative dispersion can be used to shorten pulse
duration in chirped pulse lasers
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- Hardware and setup
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- Laser Diode Power Output Profile
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- Pulsed Fiber Laser System From Wesley Hughes and Jared Greens
Presentation
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- Pulse Generator and Amplifier
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- Modal Dispersion
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- Material Dispersion
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- Anomalous Dispersion Pulses higher frequency have faster phase
velocity than the lower frequency components Responsible for
negative dispersion, pulse compression, and soliton formation
http://www.falstad.com/dispersion/normal.ht ml
http://www.falstad.com/dispersion/normal.ht ml
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- 150 Picosecond Pulse Generator
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- 1 Nanosecond Pulse with Amplifier
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- Femtosecond Pulse Laser
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- 1km, 2km, 3km Fiber with Femtosecond Pulse Laser Results 1 km -
pulse width: 215 ps : 572ps 2 km - pulse width: 385 ps : 2.4ps 3 km
- pulse width: 382 ps: 1.62ps Results do not agree with theory
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- 20.56 km Fiber with 1 Nanosecond Pulse Laser Results
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- Multimode Fiber
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- Transfer Function
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- Input Pulse Fitting
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- Output Pulse Fitting
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- Computation of Transfer Function
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- Suggestions for Future Projects Use Optical amplifier to boost
output signal Spectral profiling of pulses Anomalous Dispersion
modeling Better fitting and transfer function modeling High powered
laser to overcome attenuation More variations of fiber lengths
Soliton formation