Optical minimum-shift keying with external modulation scheme
- 1 January 2005
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 13 (20) , 7741-7747
- https://doi.org/10.1364/opex.13.007741
Abstract
We propose an optical initial phase control technique for external modulation in the format of minimum-shift keying (MSK). In this scheme, the optical phase discontinuities inherent to external frequency-shift-keying (FSK) modulation are compensated by use of an initial phase controller in conjunction with a FSK modulator. We present the principle of the control method and then numerically and experimentally prove that the signal has a modulation spectrum more compact than that of conventional binary phase-shift keying. 10-Gbit/s external modulation in MSK format was experimentally demonstrated.Keywords
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