19 February 2009 Reduction of SPM induced spectral broadening in a high peak power narrow linewidth IR fiber laser using phase modulation
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Abstract
We present a novel scheme of reducing the spectral broadening effects of self phase modulation (SPM) in high-peak-power, narrow-band fiber lasers by preconditioning the input pulses of a master oscillator seeded high-peak-power fiber amplifier with a commercially available fiber-coupled phase modulator. We demonstrate an output emission linewidth reduction in a 1064 nm nanosecond pulse-width, 10 kW peak power fiber laser system. Modeling and measurements are presented for this system using a directly modulated diode seed laser and the resulting practical limitations imposed on SPM mitigation are discussed.
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Michael J. Munroe, Mathew Y. Hamamoto, David A. Dutton, "Reduction of SPM induced spectral broadening in a high peak power narrow linewidth IR fiber laser using phase modulation", Proc. SPIE 7195, Fiber Lasers VI: Technology, Systems, and Applications, 71952N (19 February 2009); doi: 10.1117/12.809957; https://doi.org/10.1117/12.809957
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