We derive generic phase and amplitude coupling relations for beam splitters-combiners that couple a single port with three output ports or input ports, respectively. We apply the coupling relations to a reflection grating that serves as a coupler to a single-ended Fabry-Perot ring cavity. In the impedance-matched case such an interferometer can act as an all-reflective ring mode cleaner. It is ...

Future fiber optic communications systems will utilize wavelength division mutliplexing as a means of transmitting more information over the same number of fibers. A single source capable of generating multiple frequencies simultaneously would be an attractive option for such systems. We report here on an all-fiber, dual-frequency, colasing, widely tunable laser source with the potential for mu...

The objective of this work is to develop a numerical procedure to subtract the instrumental function from a measured spectral line pro0le. The measuring device (for example, a Fabry–Perot Interferometer) distorts the spectral line pro0le and the experimentally measured one is a convolution of this pro0le and the instrumental function. Restoring the spectral line pro0le is strongly a5ected by nu...

Next generation gravitational wave (gw) antennas employ RSE (Resonant Sideband Extraction) interferometers with Fabry-Perot cavities in the arms as an optical configuration. In order to realize stable, robust control of the detector system, it is a key issue to extract appropriate control signals for longitudinal degrees of freedom of the complex coupled-cavity system. In this paper, a novel le...

We present a new scheme to generate high dimensional entanglement between two photonic systems. The idea is based on parametric down conversion with a sequence of pump pulses generated by a mode-locked laser. We prove experimentally the feasibility of this scheme by performing a Fransontype Bell test using a 2-way interferometer with path-length difference equal to the distance between 2 pump p...

A novel scheme is presented for production of a thin (< 1 mm) uniform vapor layer over a large surface area (> 100 cm 2) by pulsed laser ablation of a solid surface. Instead of dispersing the laser energy uniformly over the surface, a modified Fabry-Perot interferometer is employed to concentrate the laser energy in very narrow closely-spaced concentric rings. This approach may be optimized to ...

Objective: In this experiment, you will measure the small energy shifts in the magnetic sublevels of atoms in "weak" magnetic fields. The visible light from transitions between various multiplets is dispersed in a 1.5 m grating spectrograph and observed with a telescope. Each observed line consists of a group of closely spaced unresolved lines from the emissions among the different magnetic sub...

A closed-cell photothermal detector for aqueous analytes has been evaluated at 254 and 678 nm. We used a detector with a water meniscus as a pressure sensor, whose periodic deflection was measured using a low-finesse optical fiber Fabry-Perot interferometer. Performance was compared with a commercial diode array spectrometer and found to be similar for absorption measurements in nonturbid sampl...

Abstract Recent measurements at the LIGO Hanford Observatory have confirmed the predicted high-frequency dynamic response of km scale Fabry–Perot cavities to length and laser frequency variations. The dynamic response functions have been exploited to determine a number of cavity parameters including the cavity length and the resonance width. A new technique based on a variation of these measure...