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15 February 2012 Single frequency acoustically tailored Raman fiber amplifier
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We present experimental results of a single-stage Raman fiber amplifier (RFA) for guide star application. SBS suppression was achieved through the acoustic tailoring of the core of a polarization-maintaining single-mode conventional fiber. The core was also doped for enhanced Raman gain. This fiber was utilized in a counter-pumped amplifier configuration to generate 1178 nm light with a linewidth < 2 MHz for frequency doubling into the D2 sodium line. Due to the SBS suppressing characteristics of the fiber, the RFA provided 11.2 W of 1178 nm signal when seeded with 15 mW. Application of a thermal gradient allowed for further power scaling leading to 18.3 W. Our measurement of the linewidth at the highest output power indicated no spectral broadening.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christopher Vergien, Iyad Dajani, Craig Robin, Clint Zeringue, and Keith Wyman "Single frequency acoustically tailored Raman fiber amplifier", Proc. SPIE 8240, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XI, 82400M (15 February 2012);

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