公开(公告)号：US12272920B1

公开(公告)日：2025-04-08

申请号：US18973149

申请日：2024-12-09

Applicant: Beijing University of Technology

Inventor： Pingxue Li ,  Xuan Wang ,  Chuanfei Yao

IPC: H01S3/108 ,  H01S3/067 ,  H01S3/08 ,  H01S3/0941 ,  H01S3/1115 ,  H01S3/16 ,  H01S3/23

Abstract: A broadband laser system enhanced in the later part of mid infrared spectrum is provided, which can obtain a high power and wide spectrum laser output enhanced in the later part of mid infrared spectrum, and has the advantages of full fiber, compact structure and high ratio of power in the later part of mid infrared spectrum. It includes a mode-locked fiber laser, a pre amplifier, an optical fiber stretcher, an amplifier, a main amplifier, a first nonlinear optical fiber, a mid infrared amplifier and a second nonlinear optical fiber, which are connected in sequence, and each of them adopts a water cooling device or a thermo electric cooler, and is connected by optical fiber fusion.

公开(公告)号：US12180112B1

公开(公告)日：2024-12-31

申请号：US18809407

申请日：2024-08-20

Applicant: Beijing University of Technology

Inventor： Pingxue Li ,  Chuanfei Yao ,  Guochuan Ren ,  Kaihang Li

IPC: C03C3/32 ,  C03C25/1065 ,  C03C25/305 ,  C03C25/42 ,  H01S3/067

Abstract: An optical fiber with a double-clad fluoride with low loss and high pump absorption efficiency, and its preparation method are provided. The gain optical fiber with the double-clad fluoride includes a fiber core, a D-shaped inner cladding, an outer cladding, and a polymer coating, wherein the fiber core, the inner cladding, and the outer cladding are all fluoride glass materials, and the polymer coating is a fluorinated ethylene propylene copolymer. The fiber core and inner cladding structure are prepared by a suction injection method, and the inner cladding is polished into a D-shaped structure, and the outer cladding is prepared by a core insertion casting method to form an optical fiber preform with D-shaped double-clad fluoride and draw an optical fiber.