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Interferometric method for preventing mode-hopping in tunable external-cavity semiconductor lasers

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5 Author(s)
M. Ohtsu ; AT&T Bell Laboratories, Crawford Hill Laboratory, Holmdel, USA ; K. -Y. Liou ; E. C. Burrows ; C. A. Burrus
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A problem in frequency-tuning of external-cavity lasers is mode-hopping between neighbouring external-cavity modes. We demonstrate a new interferometric method for monitoring mode-hoping and an automatic control circuit for a 1.3 ¿m grating external-cavity laser that maintains single-mode operation when the lasing frequency is tuned.

Published in:

Electronics Letters  (Volume:23 ,  Issue: 21 )