Over the past decades, discrete or distributed Fiber Optic Sensing (FOS) applications have seen an increased acceptance
in many areas. High level optical and mechanical reliability of optical fiber is necessary to guarantee reliable
performance of FOS. In this paper, we review recent research and development activities on new specialty fibers. The
main approaches to enhancing fiber attributes include new refractive index profile design and fiber coating
Recently there has been considerable interest in the generation of cylindrical vector beams for numerous possible
applications in nano-biophotonics, optical imaging, the laser processing of materials and the generation of single
photon sources among others. Cylindrical vector optical vortex beams are shown by propagating a fundamental
laser mode through a spun ber. The polarization state of the output from the ber is characterized and the the
process of this mode conversion will be discussed.
We present a novel fiber design using both stress rods and air holes for making wide band single polarization fibers as
well as polarization maintaining fibers. The key factor that makes the fiber design possible is that the stress-induced
birefringence from the stress rods and the form birefringence from air holes are added constructively, which increases
the total birefringence and allows more flexible choice of fiber parameters. We established a finite element model that is
capable to study both the stress-optic effect and the wave-guide effect. Through the detailed modeling, we
systematically explore the role of each major parameter. Different aspects of the fiber properties related to the
fundamental mode cutoff, fiber birefringence and effective area are revealed. As a result, fibers with very large single
polarization bandwidth as well as larger effective area are identified.
Over the last several years, Fiber Optic Sensor (FOS) applications have seen an increased acceptance in many areas
including oil & gas production monitoring, gyroscopes, current sensors, structural sensing and monitoring, and
aerospace applications. High level optical and mechanical reliability of optical fiber is necessary to guarantee reliable
performance of FOS. In this paper, we review recent research and development activities on new specialty fibers. We
discuss fiber design concepts and present both modeling and experimental results. The main approaches to enhancing
fiber attributes include new index profile design and fiber coating modification.
This paper reviews recent progress and experiment and modeled results on dual air hole-assisted polarizing fibers which can act as either Single Polarization (SP) fiber or Polarization Maintaining (PM) fiber. Dual air hole-assisted fiber design provides both SP and PM characteristics for the same fiber at different wavelength range. SP operating windows centered at wavelength from 980 nm to 1550 nm with bandwidth ranging from 24 nm to 63 nm are demonstrated. Various properties of the fibers are studied. We explored bend and length dependence of SP window which enables fining tuning in actual device application. We also investigated SP and PM characteristics over wide range of temperature, such as fundamental cutoff wavelength, extinction ratio and birefringence. It was found that hole-assisted polarizing fiber provides less temperature sensitivity compared to stress member-assisted polarizing fiber. Lastly, Ytterbium (Yb) doped SP fiber, which combines gain medium and polarizer into single element was realized. Significant benefits can be achieved by using Yb-doped SP fiber in application such as fiber laser or amplifier, which requires linearly polarized output.
This paper reviews and presents the recent specialty fiber research and development conducted at Corning Incorporated
towards high-power and high-brightness fiber lasers. These include the fabrication of all glass-composition, high-NA,
Yb-doped double-clad laser fibers, and also of double-clad single-polarization laser fibers for further improved
brightness in laser beam quality through innovative fiber designs. These have led to the 1st all-glass, high NA, Yb-doped
high-power double-clad fiber made by an all-vapor-phase fiber-preform process in the world, and also the highbrightness,
single-polarization double-clad high power laser fiber.
We have demonstrated high power, linearly polarized output from an
all-fiber laser using an integrated polarizing fiber. In this
paper, we will detail the design, fabrication and operation of the
single polarization fiber as well as the fiber laser experiments.
This paper reviews recent progress and presents new designs and experimental results on single polarization (SP) fibers. The design concept for achieving SP propagation and approaches using either stress induced birefringence or hole-assisted geometrical birefringence for realizing single polarization fibers are described. Designs of hole-assisted SP fibers with either dual holes or a central hole are discussed in details. Effects of fiber parameters on SP fiber performance such as bandwidth, cutoff wavelength, mode field area are analyzed. Results on fabrication and characterization of dual-hole-assisted SP fibers are presented. SP operating windows centered at wavelength from 900 to 1600 mm with bandwidths from 18 to 55 nm are realized. Applications of SP fibers for single mode fiber lasers to produce linear polarized laser output are demonstrated with extinction ratio of 17-20 dB.
We review current work on fiber laser systems at Corning. In particular, we describe design and performance of all-glass double-clad laser fibers, broad-area laser pumps, and pump coupling optics. We discuss our approaches using single-polarization fiber and low-nonlinearity photonic band gap fiber as technologies for developing the next generation of high-power fiber lasers.