As a reference, we first measured TPQI in a dielectric 50–50 directional coupler made from silicon nitride waveguides, observing a visibility of 0.944 ± 0.003.

For the ring cavity used in the experiment, the coupling coefficients of the directional coupler were measured to be 79% for the pump, <1% for the first order, and 4% for the second-order Stokes ...

The Model IPP-3013 is a dual-directional 200-W coupler covering 100 to 1000 MHz in a 1.50- by 2.50-in. package with SMA connectors. A typical application for the coupler includes ...

TTM Technologies, Inc. Unveils New Xinger® High-Performance 50W (AVG) Directional and Hybrid Couplers for X-Band Commercial-Off-The-Shelf Military and Aerospace Applications TTM Technologies, Inc ...