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A high efficiency architecture for cascaded Raman fiber lasers
V R Supradeepa1, Jeffrey W Nichsolson, Clifford E Headley
1OFS Laboratories, 19 Schoolhouse Road, Somerset, New Jersey 08873, USA. supradeepa@ofsoptics.com
Optics Express
|April 3, 2013
Summary
We developed a novel high-efficiency cascaded Raman fiber laser architecture. This single-pass design achieved 204W output power and 65% conversion efficiency, the highest reported for such lasers.
Area of Science:
- Optics and Photonics
- Laser Physics
- Materials Science
Background:
- Cascaded Raman fiber lasers are crucial for generating various wavelengths.
- Conventional resonator architectures face limitations in efficiency and power scaling.
- High-efficiency laser systems are in demand for diverse applications.
Purpose of the Study:
- To demonstrate a new high-efficiency architecture for cascaded Raman fiber lasers.
- To achieve record output power and conversion efficiency in a single-pass cascaded amplifier configuration.
- To utilize a multi-wavelength seed source for seeding intermediate Stokes wavelengths.
Main Methods:
- Employed a single-pass cascaded amplifier configuration.
- Utilized a multi-wavelength seed source to seed all intermediate Stokes wavelengths.
- Leveraged a lower-power Raman laser as a convenient seed source.
Main Results:
- Demonstrated a 1480nm laser pumped by an 1117nm Yb-doped fiber laser.
- Achieved a maximum output power of 204W.
- Reached a conversion efficiency of 65%, approaching the quantum-limited efficiency of ~75%.
Conclusions:
- The new architecture offers significant improvements in power and efficiency for cascaded Raman fiber lasers.
- This work sets a new benchmark for output power and conversion efficiency in this laser type.
- The demonstrated system is highly promising for applications requiring high-power, wavelength-tunable laser sources.
