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Single-Polarization Cladding-Pumped Optical Amplifier Without Polarization-Maintaining Gain Fiber

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4 Author(s)
Timothy M. Yarnall ; Lincoln Lab., Massachusetts Inst. of Technol., Lexington, MA, USA ; Todd G. Ulmer ; Neal W. Spellmeyer ; David O. Caplan

We demonstrate a single-polarization cladding-pumped Er : Yb optical amplifier using a dual-pass design with a Faraday rotator mirror and nonpolarization-maintaining gain fiber. Over a 25-nm range centered at 1562 nm, the amplifier output exceeds 1 W and maintains a polarization extinction ratio greater than 22 dB. We investigate enhanced relative intensity noise inherent in the dual-pass configuration and discuss scaling to higher powers.

Published in:

IEEE Photonics Technology Letters  (Volume:21 ,  Issue: 18 )