CO₂ laser-fabricated cladding light strippers for high-power fiber lasers and amplifiers

Boyd, Keiron, Simakov, Nikita, Hemming, Alexander, Daniel, Jae, Swain, Robert, Mies, Eric, Rees, Simon, Clarkson, W.Andrew and Haub, John (2016) CO₂ laser-fabricated cladding light strippers for high-power fiber lasers and amplifiers. Applied Optics, 55 (11), 2915-2920. (doi:10.1364/AO.55.002915).

Abstract

We present and characterize a simple CO₂ laser processing technique for the fabrication of compact all-glass optical fiber cladding light strippers. We investigate the cladding light loss as a function of radiation angle of incidence and demonstrate devices in a 400 µm diameter fiber with cladding losses of greater than 20 dB for a 7 cm device length. The core losses are also measured giving a loss of <0.008 ± 0.006 dB/cm. Finally we demonstrate the successful cladding light stripping of a 300 W laser diode with minimal heating of the fiber coating and packaging adhesives.

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