Ultracompact reference ultralow expansion glass cavity

Ultralow noise miniature external cavity semiconductor laser

Advanced applications in optical metrology demand improved lasers with high spectral purity, in form factors that are small and insensitive to environmental perturbations. While laboratory-scale lasers with extraordinarily high stability and low noise have been reported, all-integrated chip-scale devices with sub-100 Hz linewidth have not been previously demonstrated. Lasers integrated with opt...

Detection of ultralow-frequency cavity modes using spacecraft data

[1] The cold, magnetized plasma in the Earth’s magnetosphere supports two ultralowfrequency plasma wave modes. Both these modes may exhibit resonant oscillations in the magnetosphere cavity. Theoretical and numerical studies have predicted the existence of cavity/waveguide resonance modes, yet experimental evidence is sparse. In this paper we detail the expected structure of these modes using b...

Cavity Expansion Methods in Geomechanics

Spherical Cavity Expansion in Material with Densification

LLE Review, Volume 85 15 Introduction Fused silica (SiO2) exhibits some unique features when it is ground or polished. It also densifies permanently under large compressive stresses at room temperature;1–3 up to 15% permanent densification has been observed.2,3 The experimental data for densification from different works, however, are obviously inconsistent,4 which may result from different lev...

Wine - Glass Micromechanical - Disk Reference Oscillator

The quartz crystal used in the reference oscillator in a wireless communication transceiver is among the most difficult to integrate on chip. On-chip devices capable of matching its Q (on the order of 10,000) and temperature stability (<35ppm over 0-70C) are generally unavailable. Recently, an on-chip vibrating clamped-clamped beam (CC-beam) micromechanical resonator based on MEMS technology ha...