Power scaling of a fiber master oscillator power amplifier system using a coherent polarization beam combination |
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Authors: | Uberna Radoslaw Bratcher Andrew Tiemann Bruce G |
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Affiliation: | Lockheed Martin Coherent Technologies, 135 South Taylor Avenue, Louisville, Colorado 80027, USA. radek.uberna@lmco.com |
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Abstract: | A new coherent polarization beam combination (CPBC) architecture was employed to combine four amplified beams and produce over 25 W of coherent output with 94% efficiency and nearly diffraction-limited beam quality. The individual beams were produced by a fiber master oscillator power amplifier system and their phases were controlled and locked using servo-controlled phase modulators. The CPBC approach relies on a coherent superposition of orthogonal polarization states and allows the combination of an arbitrary number of beams with arbitrary power ratios. |
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