公开(公告)号：US20190058524A1

公开(公告)日：2019-02-21

申请号：US16166096

申请日：2018-10-20

Applicant: University of Electronic Science and Technology of China

Inventor： Yunjiang Rao ,  Yun Fu ,  Jiaqi Li ,  Zinan Wang

IPC: H04B10/25 ,  H04J14/02 ,  H04B10/50

Abstract: A hybrid distributed amplification method based on a random fiber laser generated within erbium fiber with low doping concentration, i.e. weak erbium-doped fiber (WEDF), which includes: Step 1. constructing a fiber link via WEDF; Step 2. generating the random fiber laser based on the fiber link, the pump source, the wavelength division multiplexer and the strong feedback module; Step 3. constructing the spatial equalized gain based on hybrid gain of the erbium fiber and random fiber laser; Step 4. the signal is amplified by the hybrid spatial equalized gain. The present invention solves the typical problem of high laser threshold and low pump conversion efficiency when conventional fiber is used to generate random fiber laser for distributed amplification.

公开(公告)号：US20180366897A1

公开(公告)日：2018-12-20

申请号：US16112516

申请日：2018-08-24

Applicant: University of Electronic Science and Technology of China

Inventor： Zinan Wang ,  Jiaqi Li ,  Han Wu ,  Yunjiang Rao

IPC: H01S3/067

Abstract: A random distributed Rayleigh feedback fiber laser based on a double-cladding weakly ytterbium-doped fiber includes: a pump laser source, a pump combiner, a cladding power stripper, and a double-cladding weakly ytterbium-doped fiber for simultaneously achieving distributed active gain and random distributed Rayleigh feedback. An output end of the pump combiner is connected with one end of the double-cladding weakly ytterbium-doped fiber, the other end of the double-cladding weakly ytterbium-doped fiber is connected with an input end of the cladding power stripper, and a concentration of ytterbium ions in the double-cladding weakly ytterbium-doped fiber is in a range of 0.5×1023 to 1×1027/m3. The laser provided by the present invention solves the problem that the existing random fiber lasers cannot simultaneously utilize distributed active gain and random distributed Rayleigh feedback with a single type of fiber.