Mode scrambler

About: Mode scrambler is a research topic. Over the lifetime, 896 publications have been published within this topic receiving 13595 citations.

Rectangular versus circular fiber core designs: New opportunities for mode division multiplexing?

Abstract: The properties of rectangular core fiber are investigated for mode division multiplexing. Polarization degenerate mode groups, favorable mode profiles for device coupling, modal area uniformity, and good splice performance suggest it's a good candidate.

Mode-Mode Interference Effects In Axially Strained Few-Mode Optical Fibers

Abstract: Optical fiber modal domain methods which use mode-mode interference as the sensing mechanism have been used to detect strain, temperature and pressure. Typically, bending-induced strain applications involve mode coupling which changes the mode field distributions. In this paper, we report the use of axial strain with minimal bending on a few-mode optical fiber ( V = 4.47) to study mode pattern modulation. Such modulation due to quasi-statically varying strain in particular has been observed and quantified. More complicated low frequency strain variations about "quiescent DC strain" points associated with different system strain sensitivities have also been analyzed. A heuristic discussion of the modal domain phenomenon responsible for this fiber waveguide modal behavior is presented.

Effective Mode Field Diameter for LP 11 Mode and Its Measurement Technique

Abstract: The effective mode field diameter (MFD) for the second-order (LP11) mode in two-mode fibers is determined to allow estimation of the coupling efficiencies at a splice with axial misalignment. Simulations are performed to verify its validity. In addition, we propose a novel technique for measuring the effective MFD distribution for the LP11 mode along two-mode fibers. The technique is based on optical time-domain reflectometry; it conducts measurements in the two-mode region of test fibers and individually observes the LP01 and LP11 modes of the backscattered light. Its feasibility is demonstrated experimentally.

Single mode operation with non-single mode optical fiber transmission cable

Abstract: An optical fiber transmission path for interconnecting a transmitter and receiver for single mode operation at a predetermined wavelength. Most of the path is formed by a transmission cable made up of several optical fibers, spliced end-to-end, that are single mode at a wavelength longer than the predetermined wavelength, but possibly not single mode at the predetermined wavelength. The splice between the fibers is fabricated so as to exhibit minimized splice loss, as measured for only the fundamental mode at the predetermined wavelength. The transmission path of the invention also includes an optical fiber which is very short relative to the transmission cable and is in the path between the transmitter and the cable. The short fiber is selected to be single mode at the predetermined wavelength. A mode stripper is in the path, near the end of the transmission cable that is nearest the receiver. The mode stripper transmits only the fundamental mode at the predetermined wavelength.

Optical devices based on energy transfer between different modes in optical waveguide

Abstract: Optical waveguide devices (100) based on optical coupling of different modes (110, 130) by using a mediating mode (120). Such waveguide devices (100) generally have at least to coupling regions (104, 106). The first coupling region (104) couples an output mode and the mediating mode, and the second one (106) couples the mediating mode and an input mode that copropagates with the output mode. Under proper conditions, the energy in the input mode can be completely transferred to the output mode, without energy loss to the mediating mode (120).