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This paper describes a focus adjustment system particularly designed for the fast-mechanical-scanning and phase-sensitive laser probe for radio frequency (RF) surface and bulk acoustic wave (SAW/BAW) devices. When high spatial resolution is necessary for the observation, one needs an objective lens of large magnifying power with extremely shallow focal depth. Then a tiny inclination of a measurement...
This paper describes the application of the developed fast-scanning laser probe system to the diagnosis of frequency dependence of lateral energy leakage occurring in RF BAW devices. According to wavenumber domain analyses, dispersion relation for the device under test is derived, the leakage behaviors at different frequencies are shown as images, and energy of each lateral mode is evaluated quantitatively...
The paper describes the development of an integrated software environment for the image processing of complex data captured by phase-sensitive SAW/BAW laser probe system. By the software using graphical user interface, efficient diagnosis of SAW/BAW devices is made possible. The developed software displays the amplitude and phase images of acquired results, and a motion movie of the field pattern...
We report on development of a cryocooled system prototype for high-throughput single flux quantum (SFQ) digital applications. The system was designed to have 32 I/O links with a bandwidth of 10 Gbps/port. An SFQ multi-chip module (MCM), double mu-metal magnetic shields, a 40-K radiation shield, customized GaAs cryogenic amplifiers, a 32-pin wide-bandwidth cryo-probe, and 32 I/O cables were packaged...
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