Phase Stability of ATA Fiber Optic Cables

High-stability transfer of an optical frequency over long fiber-optic links

We present theoretical predictions and experimental measurements for the achievable phase noise, timing jitter, and frequency stability in the coherent transport of an optical frequency over a fiber-optic link. Both technical and fundamental limitations to the coherent transfer are discussed. Measurements of the coherent transfer of an optical carrier over links ranging from 38 to 251 km demons...

COMPARISON OF DIFFERENT GLASS COMPOUNDS FOR INTRINSIC FIBER OPTIC TEMPERATURE SENSORS

Different glasses suitable for temperature sensing in the fiber optic sensors were studied in this article. The phase changes for eight different glass materials were calculated and results were compared. Our results showed that extra dense flint glass is the most sensitive one, while pure silica results in the lowest phase change. In another study the effect of wavelength on the phase variatio...

Nonlinearity measurement of optical fibers using continuous-wave self-phase modulation method

EVLA Memo 105 Phase coherence of the EVLA radio telescope

The design of the National Radio Astronomy Observatory’s Expanded Very Large Array (EVLA) project is approaching completion. Four of the twenty-seven antennas have been upgraded into the final configuration. The 2200 miles of fiber optic cables have been installed underground and are functional. The master oscillator and the round trip phase hardware have been operating uninterrupted since Nove...

Fiber Optic Cable Assemblies for Space Flight Applications III: Characterization of Commercial Cables for Thermal Effects

Introduction This is the third paper in a series of white papers addressing the issues associated with the usage of optical fiber cables in space flight applications.[1-2] These experiments to characterize commercially available optical fiber cables are crucial to deciding which cables are appropriate for which space flight mission based on their environmental performance. The objective of this...