3results about How to "Reduce splice loss" patented technology

This utility model discloses a rotating mechanism for driving optical fibers in a hollow-core optical fiber fusion splicer. The mechanism includes a rotating mechanism body, with an optical fiber rotation positioning mechanism mounted at the front. A rotating seat is mounted on the optical fiber rotation positioning mechanism, and a notch is formed on the surface of the rotating seat. An optical fiber is inserted through the notch. A conductive slip ring is mounted on the rotating mechanism body, and a driving ring is movably mounted inside the conductive slip ring. Connecting seats are fixedly mounted on both sides of the end of the driving ring, and the connecting seats are screwed to the end face of the rotating seat. This rotating mechanism allows the optical fiber to rotate during thermal fusion welding. By rotating the optical fiber, the optimal alignment angle can be found, reducing fusion loss caused by the irregularity of the optical fiber itself. This ensures that the two optical fibers can achieve ideal concentric alignment during fusion splicing, avoiding limitations on the transmission bandwidth and data transmission rate of the optical fiber communication system, which could lead to signal distortion and affect communication quality.

The present invention discloses an eccentric rare earth doped optical fiber and its application, an optical fiber laser, and an optical fiber amplifier. The glass part of the optical fiber includes a rare earth doped core with a decreasing refractive index from the inside to the outside, and an eccentric inner cladding; the outer contour of the cross section of the core is a rectangle or a regular polygon; the outer contour of the cross section of the eccentric inner cladding is a circle, and its center coincides with the geometric center of the cross section of the eccentric rare earth doped optical fiber; there is a distance D between the geometric center of the cross section outer contour of the core and the center of the outer contour of the eccentric inner cladding, and D>0. The eccentric rare earth doped optical fiber provided by the present invention adopts a rectangular or regular polygonal core, which, on the one hand, improves the absorption efficiency of the core, and on the other hand, reduces the energy loss of the cladding evanescent wave overflow, thereby comprehensively improving the pumping efficiency. The present invention is used as an optical gain medium for lasers and optical fiber amplifiers, and has the advantages of device miniaturization, high absorption efficiency, and low fusion loss.

The invention provides a high-power high-order transverse-mode super-continuum spectrum laser source, which comprises a high-order transverse-mode pulse fiber laser used for generating high-order transverse-mode seed pulse laser with stable time domain and high mode purity as a pulse laser seed source; the optical fiber laser amplifier is used for amplifying the average power and the peak power of the target-order high-order transverse mode seed pulse laser and outputting high-power target-order high-order transverse mode pumping laser as a laser pumping source; and the few-mode photonic crystal fiber serves as a laser nonlinear transmission medium and is used for converting the high-power target-order high-order transverse-mode pumping laser into a super-continuum spectrum through a nonlinear effect and a dispersion effect, maintaining mode characteristics of output laser and outputting high-power target-order high-order transverse-mode super-continuum spectrum laser. According to the method, the output power upper limit of the super-continuum spectrum generated by the photonic crystal fiber can be improved, and the visible spectrum proportion is increased.