AI Article Synopsis
- Compact silicon-on-insulator (SOI) waveguide Fabry-Perot microcavities with silicon/air Bragg mirrors exhibit a high quality factor (Q=4,584) and finesse (F=82).
- Efficient thermal tuning over 2 nm is accomplished by passing current through the silicon cavity, requiring under 50 mW of power.
- The design enables rapid switching times (1.9 microseconds) at low power levels, with potential for even faster responses (640 nanoseconds) when overdriven, along with discussions on further enhancements.
Article Abstract
Compact silicon-on-insulator (SOI) waveguide thermo-optically tunable Fabry-Perot microcavities with silicon/air Bragg mirrors are demonstrated. Quality factors of Q=4,584 are measured with finesse F=82. Tuning is achieved by flowing current directly through the silicon cavity resulting in efficient thermo-optic tuning over 2 nm for less than 50 mW applied electrical power. The high-Q cavities enable fast switching (1.9 mus rise time) at low drive power (<10 mW). By overdriving the device, rise times of 640 ns are obtained. Various device improvements are discussed.
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| http://dx.doi.org/10.1364/oe.15.007557 | DOI Listing |
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