Phase modulation

Details Phase modulation Phase modulation

H - Electricity

04

B

H04B 10/145 (2006.01) H01S 5/50 (2006.01) H04B 10/155 (2006.01) H04L 27/20 (2006.01) H01S 5/062 (2006.01) H04B 10/17 (2006.01)

Patent

CA 2005579

travelling wave laser amplifier 12) is operated as a phase modulator by applying a modulation signal on the bias injection current. To increase modulation frequency response at the higher end and to minimise unwanted amplitude modulation the input optical signal and injection bias current are preferably set so that the amplifier is running under saturated gain conditions .

Il s'agit d'un amplificateur laser à ondes progressives 12) qu'on exploite comme un modulateur de phase en y appliquant un signal de modulation au courant polarisé d'injection. Afin d'accroître la réponse de fréquence de modulation à l'extrémité supérieure et de réduire au minimum la modulation d'amplitude parasite, le signal optique d'entrée et le courant polarisé d'injection sont de préférence définis de façon que l'amplificateur fonctionne dans des conditions de gain saturé.

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