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Narrow-band modulation of semiconductor lasers at millimeter wave frequencies (>100 GHz) by mode locking

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1 Author(s)
Lau, Kam Y. ; Ortel Corp., Alhambra, CA, USA

The possibility of mode locking a semiconductor laser at millimeter wave frequencies approaching and beyond 100 GHz was investigated theoretically and experimentally. It is found that there are no fundamental theoretical limitations in mode locking at frequencies below 100 GHz. At these high frequencies, only a few modes are locked and the output usually takes the form of a deep sinusoidal modulation which is synchronized in phase with the externally applied modulation at the intermodal heat frequency. This can be regarded for practical purposes as a highly efficient means of directly modulating an optical carrier over a narrow band at millimeter wave frequencies. Both active and passive mode locking are theoretically possible

Published in:

Quantum Electronics, IEEE Journal of  (Volume:26 ,  Issue: 2 )