An all-fiber ld-pumped multimode fiber cascaded Raman random laser

A technology of random lasers and multimode optical fibers, which is applied to lasers, laser components, phonon exciters, etc., can solve the problems of complex structure, instability, and reduced fiber input power of experimental devices, so as to achieve good beam quality and increase utilization efficiency effect
CN108695680BActive Publication Date: 2020-10-02UNIV OF ELECTRONICS SCI & TECH OF CHINA
8 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2020-10-02

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses an all-fiber LD-pumped multi-mode optical fiber cascaded Raman random laser, comprising: an LD pumping laser source group, the output end of the LD pumping laser source group is connected to a multi-mode optical fiber combiner, and multiple The output end of the mode fiber combiner is connected to a mode field adapter, the output end of the mode field adapter is connected to a fiber grating string, the output end of the fiber grating string is connected to a multimode fiber, and the input and output fibers of the multimode fiber combiner have the same core diameter and The fiber type at the input end is the same as the output fiber type of the LD pump laser source, the fiber type at the input end of the mode field adapter is the same as that at the output end of the multimode fiber combiner, and the fiber type at the output end of the mode field adapter and the fiber grating string are the same as those of the multimode fiber same type. Using a specific matching multimode fiber combiner and a matching mode field adapter, the matching fiber grating series can be cascaded to obtain a cascaded Raman random laser with high beam quality and high power.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of fiber lasers, in particular to an all-fiber LD-pumped multimode fiber cascaded Raman random laser. Background technique

[0002] High-power fiber random lasers have excellent performance in terms of beam quality, output power, and efficiency, and can be widely used in industrial applications and can be used as powerful pump sources for mid-infrared laser generation. Most high-power fiber random lasers usually couple multiple LDs into a double-clad active fiber doped with rare earth elements Yb, Er, etc., through a multimode fiber combiner, so that the corresponding emission bands, for Yb-approx. 1.05 μm and about 1.55 μm for erbium-doped fiber provide amplification. However, Raman lasers based on pumping to introduce Raman gain in passive fibers have small quantum defects, fast gain response, low background spontaneous emission, and no photodarkening effect compared with Er or Yb-doped fiber lasers. adv...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More