Reverse pumping narrow linewidth fiber laser amplifier and method

• Main Authors: XING YINGBIN, LIAO SHIBIAO, LI JINYAN, DAI NENGLI, PENG JINGGANG
• Format: Patent
• Language: Chinese; English
• Published: 14.11.2023
• Subjects: BASIC ELECTRIC ELEMENTS; DEVICES USING STIMULATED EMISSION; ELECTRICITY

The invention discloses a reverse pumping narrow linewidth fiber laser amplifier and a method, and belongs to the technical field of fiber lasers. Comprising a narrow linewidth optical fiber laser seed source, an optical fiber isolator, an optical fiber coupler, an optical fiber mode field adapter, a first cladding light filter, an (N + 1) * 1 forward beam combiner, a double-cladding gain optical fiber, an (N + 1) * 1 reverse beam combiner, a pumping laser module, a second cladding light filter and an optical fiber collimator. According to the invention, the method of introducing the (N + 1) * 1 forward beam combiner and connecting the N pumping arms at the pumping end of the forward beam combiner to form N/2 melting points is applied to a narrow-linewidth fiber laser system, and the residual pumping light is reused and distributed, so that the energy distribution in the longitudinal direction of the gain fiber is effectively balanced, the average thermal load of the gain fiber is reduced, and the service lif