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Single-mode optical fiber coupling of high-power tapered gain region devices

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6 Author(s)
J. C. Livas ; Lincoln Lab., MIT, Lexington, MA, USA ; S. R. Chinn ; E. S. Kintzer ; J. N. Walpole
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A simple method for collimating the optical output of a tapered gain region amplifier or laser and coupling to a single-mode optical fiber is described, along with a technique for quantitatively assessing the expected coupling efficiency. By using a tapered laser, 840 mW at 980 mm was coupled into single-mode fiber with 44% efficiency measured from fiber input to available internal fiber power, in excellent agreement with the 48% predicted. When transmission losses of the collimating optics are included, the power coupling efficiency referred to the laser facet power is 32%.<>

Published in:

IEEE Photonics Technology Letters  (Volume:6 ,  Issue: 3 )