Electrooptical Amplitude Modulator.
DEPARTMENT OF THE NAVY WASHINGTON D C
Pagination or Media Count:
An optical waveguide system is described for transforming the output of a phase modulator into an amplitude modulation. Laser light propagating in the waveguide is forwarded into branches in the waveguide. An electrooptic material placed in one or more branches is electrically controlled to vary the phase in each branch causing different propagation modes. The branched optical radiation or coherent light is then recombined in a single branch and subsequently branched again with each subsequent branch propagating a different mode. By tapering one of the latter branches to zero thickness, selective modes can be blocked resulting in amplitude modulation.
- Fiber Optics and Integrated Optics