High Power Double-Clad Fiber Laser
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Colin Diehl & Jered Richter High Power Double-Clad Fiber Laser
description
High Power Double-Clad Fiber Laser. Colin Diehl & Jered Richter. Single-Mode Fiber 6 µm core / 125 µm cladding High Beam Quality Low Propagation Loss Lower Power Pumping Expensive Pumping. Multimode Fiber 50 µm core / 125 µm cladding Higher Power Pumping Inexpensive Pumping - PowerPoint PPT Presentation
Transcript of High Power Double-Clad Fiber Laser
Colin Diehl & Jered Richter
High Power Double-Clad Fiber Laser
Single-Mode Fiber6 µm core / 125 µm cladding
+ High Beam Quality+ Low Propagation Loss- Lower Power Pumping- Expensive Pumping
Multimode Fiber50 µm core / 125 µm cladding
+ Higher Power Pumping+ Inexpensive Pumping- Poor Beam Quality- High Propagation Loss
Double-Clad Fiber Laser light propagates in single-mode core Pump light propagates in inner cladding
Pump Laser – 50 W 915 nm Laser Diode
Protection Circuit
Erbium-Ytterbium Co-Doped Fiber
Optical Fiber Modes
Mode Scrambling
Experimental Results
• Maximum output power of 1.384 W
• Slope efficiencies increased 10% 13% 15%
Experimental Results
• Small changes due to inconsistent polish quality
• Coupling optimization not crucial
Linewidth
• Monochromator resolution of 0.3 nm
• FBG bandwidth of 0.1 nm
Beam Profile
•M2 = 1.10
•Rayleigh length = 3.3 mm
Beam waist = 86 µm
Future Improvements
Improve output power:• Increase EYDF length• Pump with 975 nm laser• Additional pump lasers
Improve linewidth• Incorporate Fabry-Perot cavity• Or incorporate diffraction grating
