Optical modulation in a resonant tunneling relaxation oscillator

Details Optical modulation in a resonant tunneling relaxation oscillator Optical modulation in a resonant tunneling relaxation oscillator

2005-03-16

arxiv.org/abs/physics/0503140v1

Appl. Phys. Lett., 74, 9, pp. 1197-1199 (Mar. 1999).

Physics

Optics

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Scientific paper

We report high speed optical modulation in a resonant tunneling relaxation oscillator consisting of a resonant tunneling diode (RTD) integrated with a unipolar optical waveguide and incorporated in a package with a coplanar waveguide transmission line. When appropriately biased, the RTD can provide wide-bandwidth electrical gain. For wavelengths near the material band-edge, small changes of the applied voltage give rise to large, high-speed electro-absorption modulation of the light. We have observed optical modulation at frequencies up to 14 GHz, associated with sub harmonic injection locking of the RTD oscillation at the fundamental mode of the coplanar transmission line, as well as generation of 33 ps optical pulses due to relaxation oscillation.

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