Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Leif Kjellberg"'
Publikováno v:
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC).
We propose and experimentally demonstrate a spatially tunable phase-OTDR based distributed microphone for listening to the sound of multiple machines. The distributed acoustic sensing capability, allied with the real-time spatial tuning, enables list
Autor:
Walter Margulis, Carolina Franciscangelis, Ingemar Söderquist, Fabiano Fruett, Leif Kjellberg
Publikováno v:
Optics express. 24(26)
The use of an optical fiber as a real-time distributed microphone is demonstrated employing a phase-OTDR with direct detection. The method comprises a sample-and-hold circuit capable of both tuning the receiver to an arbitrary section of the fiber co
Publikováno v:
Journal of Optics A: Pure and Applied Optics. 9:1057-1061
We demonstrate a novel tunable and programmable optical bandpass filter with a transmission peak less than 5 pm wide that is tunable over 18.5 nm. The number of transmission windows within the stop band, as well as each window's position and strength
Autor:
L Krummenacher, Leif Kjellberg, D Berlemont, Walter Margulis, Lars-Erik Nilsson, Åke Claesson, Mikael Fokine
Publikováno v:
Optics letters. 27(18)
Molten alloys under high pressure were used to obtain fibers with long internal electrodes that are solid at room temperature. An integrated Mach-Zehnder interferometer was constructed from a twin-core twin-hole fiber that permitted application of an