Dr. Dragic from the University of IL has developed a phase and intensity modulator using rare earth doped ytterbium fiber. The modulators are unconventional because they...
Dr. Dragic from the University of IL has developed a phase and intensity modulator using rare earth doped ytterbium fiber. The modulators are unconventional because they do not cause phase change through the passage of light. The fiber absorbs the light and heats up causing phase change to occur.
Dr. Dragic from the University of Illinois has developed an optical fiber for high-powered fiber laser applications. This fiber is specifically designed with the thermal...
Dr. Dragic from the University of Illinois has developed an optical fiber for high-powered fiber laser applications. This fiber is specifically designed with the thermal mode instability problem in mind. This fiber remains single-moded at normal operating temperatures, which enhances beam quality and power efficiency of the laser.
By doping the fiber core with a specific composition of rare-earth fibers, the refractive index of the core increases more slowly with increasing temperature, when compared to the refractive index of the cladding. This effect allows the optical fiber to maintain single-mode transmission at high temperatures.
Benefit
Improves energy efficiency of high-power fiber lasers.
Inventors from the University of Illinois have developed novel phase-separated optical fibers for use in a distributed sensor. These phase-separated optical fibers have...
Inventors from the University of Illinois have developed novel phase-separated optical fibers for use in a distributed sensor. These phase-separated optical fibers have high loss (0.05 to 5 dB/m @ 1550 nm) when compared with conventional optical fibers, and the loss dominated by Rayleigh scattering. Moreover, these phase separated fibers are produced through a molten core method (MCM) which makes the cost of production relatively low when compared with conventional fibers. When employed in a Rayleigh based distributed sensor these phase-separated optical fibers provide short-range sensitivity that is orders of magnitude greater than conventional fibers.
