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Effects of 2 MeV proton irradiation on operating wavelength and leakage current of vertical cavity surface emitting lasers

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4 Author(s)
Kalavagunta, A. ; Electr. & Comput. Eng. Dept., Univ. of Arizona, Tucson, AZ, USA ; Bo Choi ; Neifeld, M.A. ; Schrimpf, R.

We investigate the effect of 2 MeV proton radiation on high-speed oxide-confined vertical cavity surface emitting lasers. Fluences in the range of φ=2.5×1012 p/cm2 to φ=5×1014 p/cm2 were studied and laser threshold current was found to degrade linearly with fluence according to a damage factor of KI=2.77×10-15cm2/p. Laser operating wavelength increased with fluence and experienced a maximum Δλ/λ of ∼0.71% at φ=5×1014 p/cm2. Leakage current also increases as a result of the proton irradiation. We propose a degradation model based on mobility reduction and carrier removal.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:50 ,  Issue: 6 )

Date of Publication:

Dec. 2003

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