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Delay, linewidth and bandwidth limitations in optical phase-locked loop design

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2 Author(s)
Ramos, R.T. ; Dept. of Electron. & Electr. Eng., Univ. Coll. London, UK ; Seeds, A.J.

Maximum laser linewidth and loop gain in an optical phase-locked loop (OPLL) are calculated as a function of loop delay and filter bandwidth, using a cycle-slipping criterion. It is shown that a loop delay of less than 2 ns would permit the realisation of OPLLs using the recently reported submegahertz linewidth monolithic tunable semiconductor lasers.

Published in:

Electronics Letters  (Volume:26 ,  Issue: 6 )