Automatic Couplers

Fused vertical couplers

A vertical directional coupler fabricated using wafer fusion is demonstrated with a very short coupling length of 62 mm. The optical propagation loss introduced by the fused layer is investigated. An excess loss of 1.1 dB/cm at 1.55 mm was measured for waveguides which incorporate a fused junction near the core region. Fused vertical couplers make it possible to realize three-dimensional wavegu...

Types of Directional Couplers

USA TEL: (1) 631 231-1700 • INT’L TEL: (1) 631 231-1390 • FAX (1) 631 231-1711 E-MAIL: [email protected] • www.nardamicrowave.com In today’s microwave practice, the directional coupler has become a virtually indispensable measurement tool. It provides a simple, convenient, accurate means for sampling microwave energy without moving parts and without the need for adjustments. Unlike other met...

Novel Accelerator Structure Couplers*

Recent experience with X-band accelerator structure development has shown the rf input coupler to be the region most prone to rf breakdown and degradation, effectively limiting the operating gradient. A major factor in this appears to be high magnetic fields at the sharp edges of the coupling irises. As a first response to this problem, couplers with rounded and thickened iris horns have been e...

Micromachined Fluidic Couplers

A family of self-aligning micromachined fluidic couplers are presented here. Bulk micromachined and DRIE processed silicon structures have been investigated as a means of providing external connections via fused silica capillaries for MEMS fluidic devices. These couplings can have arbitrary geometry, ensuring compatibility with most fluidic ports. In addition, performance exceeds typical requir...

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