Uncertainty Estimation for the Brillouin Frequency Shift Measurement Using a Scanning Tandem Fabry-Pérot Interferometer.

The expanded uncertainty of the measured Brillouin scattering shift frequencies is essential in assessing the measurements of parameters of various materials. We describe the general operation principles of a Brillouin light scattering (BLS) spectrometer with a high-power laser and a scanning tandem Fabry-Pérot interferometer (TFPI) for material characterization. Various uncertainty components have been analyzed for the BLS spectrometer following the Guide to the Expression of Uncertainty in Measurement (GUM).

Editorial for the Special Issue on High-Power Lasers for Materials Processing.

Power lasers have been around for a long time [...

Editorial for the Special Issue on Miniature Optoelectronic Resonators and Oscillators.

The idea of developing oscillators, which can potentially replace electric oscillators such as those based on quartz, is interesting.&nbsp.

Uncertainty Evaluation on a 10.52 GHz (5 dBm) Optoelectronic Oscillator Phase Noise Performance.

This paper describes a prototype of an optoelectronic oscillator delivering a microwave signal with a power of 5 dBm at 10.52 GHz, promised to be compacted. It is evaluated in terms of its phase noise performance, and the associated ±2 dB uncertainty at 2 σ is calculated according to the international standards enacted for metrology.

Phase noise performance comparison between optoelectronic oscillators based on optical delay lines and whispering gallery mode resonators.

We investigate the phase noise performance of optoelectronic oscillators when the optical energy storage elements are in the following three configurations: a high-Q whispering gallery mode resonator, an optical delay-line and a combination of both elements. The stability properties of these various optical elements are first characterized, and then systematically compared in the optical and in the microwave frequency domains. Subsequently, the spectral purity of the oscillator is theoretically and experimentally examined for each case.

Computation method for the short-term stability of quartz crystal resonators obtained from passive phase noise measures.

The amplitude-frequency effect is a well-known phenomenon in quartz crystal resonators. It can distort the results of short-term stability measurements. In our case, results are computed from phase noise measurements in passive bridge systems.

Compact optoelectronic microwave oscillators using ultra-high Q whispering gallery mode disk-resonators and phase modulation.

We demonstrate a compact optoelectronic oscillator based on phase modulation and ultra-high Q disk resonators. A 10.7 GHz microwave is generated, with a phase noise of -90 dBrad2/Hz at 10 kHz from the carrier, and -110 dBrad2/Hz at 100 kHz.

Lowest flicker-frequency floor measured on BVA oscillators.

In this paper we will present the results of the time-domain measurement of short-term frequency stability on 7 ultra-stable 5-MHz Boitier a Vieillissement Ameliore (BVA, improved aging case) oscillators. The measurements took place in the Institute of Photonics and Electronics (IPE) in July 2008 and was a continuation of the stability measurements of BVA oscillators reported in our previous work.