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High-speed modulation characteristics of helium-implanted zinc-diffused vertical cavity surface emitting lasers

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5 Author(s)
Dziura, T.G. ; Lockheed Palo Alto Res. Lab., CA, USA ; Yang, Y.J. ; Fernandez, R. ; Bardin, T.
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The high-speed modulation characteristics of helium-implanted zinc-diffused vertical cavity surface emitting semiconductor lasers are measured. Devices with a nominal active region diameter of 10 and 20 mu m exhibit a move-out rate of 4.5-6.5 GHz/mW/sup 1/2/ and a K factor of 0.65-0.85 ns. Maximum modulation frequency is limited by ohmic heating to approximately 5.5 GHz for 10- mu m diameter lasers and to 2.7 GHz for 20- mu m diameter lasers. A rolloff in the response below the relaxation oscillation frequency is observed and is explained well by a diffusion capacitance model.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:5 ,  Issue: 11 )