Abstract: The optical frequency of a 1.5- mu m distributed-Bragg-reflector (DBR) laser is stabilized against that of a master laser by heterodyne-type frequency locking with a phase-locked loop (PLL).

Abstract: The relative permittivity, ε', and the dielectric loss tangent, tanδ, of ceramics were measured in the frequency range of 30-110 GHz by Fabry-Perot ...

DeBakey Veterans Affairs Medical Center and the Section of Health Services Research, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA Background The frequency of outpatient ...