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arXiv physics/0503140physics.opticsphysics.ins-det
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共振隧穿弛豫振荡器中的光调制

Optical modulation in a resonant tunneling relaxation oscillator

J. M. L. Figueiredo, C. R. Stanley, A. R. Boyd, C. N. Ironside

摘要:

我们报告高速光调制的共振隧穿弛豫振荡器组成的共振隧穿二极管(RTD)与单极光波导集成,并纳入一个封装与共面波导传输线。当适当偏置时,RTD可以提供宽带宽的电增益。对于材料带边附近的波长,施加电压的微小变化引起光的大的高速电吸收调制。我们已经观察到在频率高达14 GHz的光调制,与共面传输线的基模的RTD振荡的分谐波注入锁定,以及由于弛豫振荡产生33 ps的光脉冲。

英文摘要:

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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