To realize a broadband, large-line-spacing astro-comb, suitable for wavelength calibration of astrophysical spectrographs, from a narrowband, femtosecond laser frequency comb ("source-comb"), one must integrate the source-comb with three additional components: (1) one or more filter cavities to multiply the source-comb's repetition rate and thus line spacing; (2) power amplifiers to boost the p...

8.1 Introduction Microring resonators (MR) represent a class of filters with characteristics very similar to those of Fabry–Perot filters. However, they offer the advantage that the injected and reflected signals are separated in individual waveguides, and in addition, their design does not require any facets or gratings and is thus particularly simple. MRs evolved from the fields of fibre opti...

A Fabry-Perot wavemeter for analyzing a pulsed laser operating in a single longitudinal mode with an injection-seeding technique has been constructed with an array detector. This wavemeter permits the real-time measurement of both the wavelength and the spectral effectiveness of the laser pulse produced at 10 Hz. The performance of the wavemeter is checked with a frequency-stabilized He-Ne lase...

This short lecture note recalls some of the properties of Fabry-Perot interferome-ters. As an addition to textbooks , it may present some help to students working with such instruments.

A dielectric transmittance filter composed of subwavelength grating sandwiched between two few-layers distributed Bragg reflectors (DBRs) is proposed with the aim being compatible CMOS technology and to be tunable by lithographic means pattern without need thickness changes, in broad spirit metamaterials. The DBR mirrors form a Fabry-Perot (FP) cavity whose resonant frequency can tuned changing...

Micro-filters fabricated using integration methods is now the trend for multichannel filters in imaging spectrum systems. Traditional bandpass are mainly separately by multilayered thin films and then glued together. This approach involves complexity of precision cutting, dicing, adhesive bonding; therefore, possibility miniaturization quite limited. In this work, a dual channel film filter mid...

In this paper, we propose and numerically investigate a new non-reciprocal optical device enabling enhanced TE mode isolation at telecom wavelength, compatible with applications. The principle is based on magnetoplasmonic interaction between garnet waveguide side-coupled gold grating. Grating nanoslits host Fabry–Perot resonances that couple to Surface Plasmon Polaritons excited the interface m...

T he recent presidential campaigns of H. Ross Perot, and the subsequent events surrounding Perot’s Reform Party, have posed political scientists with a fascinating set of intellectual issues. In 1992, nearly one vote in five in the presidential election was cast for Perot, making his showing the strongest for a candidate from outside the two party system since 1912. Four years later, Perot’s su...

Optical Fabry-Perot interferometer sensors based on inner air-cavity is featured with compact size, good robustness and high strain sensitivity, especially when an ultra-thin air-cavity is adopted. The typical shape of Fabry-Perot inner air-cavity with reflection mode of operation is elliptic, with minor axis along with and major axis perpendicular to the fiber length. The first reflection surf...