Erbium-doped fiber laser based on 3*3 micro optical fiber coupler and manufacturing method thereof

Abstract

The invention discloses an erbium-doped fiber laser based on a 3*3 micro optical fiber coupler and a manufacturing method of the erbium-doped fiber laser. Two end mouths of the three end mouths of one end of the 3*3 micro optical fiber coupler are connected to form a ring in a melting mode, and two end mouths of the three end mouths of the other end of the 3*3 micro optical fiber coupler are connected with the two end mouths of an erbium-doped fiber respectively to form rings in a melting mode. The other end mouths of the two ends of the micro optical fiber coupler are used as a pumping light input end mouth and a laser output end mouth respectively. When 980nm pumping light is input, the laser can stably output a laser of a 1530nm wave band with a contrast ratio exceeding 40dB, a peak width at half height of 0.3nm. Due to the fact that the diameter of a coupled zone is only at a micron level, the coupled zone is provided with a large evanescent field and has excellent good temperature and mechanical performance. Therefore, the laser has large advantages on in a tunable laser and the active sensing of temperature, pressure and a refractive index.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to the research and preparation of micro-nano fiber lasers. Background technique [0002] Due to the characteristics of small size and large evanescent field, microfibers have great potential in lasers, sensors, and optical signal processing. Various types of microfiber devices based on resonators, gratings, couplers, and Sagnac mirrors have been proposed and fabricated. [0003] Recently, several types of lasers combining microfiber devices and erbium-doped fibers have been demonstrated, such as those based on ring resonators and Mach-Zehnder interferometers. There are many principles of micro-fiber lasers, such as using micro-nano fibers to circle or tie knots to form a ring resonant cavity to generate laser light. However, because the ring cavity needs to surround the micro-nano fiber and remove the tail fiber, it needs to couple light into the fiber through space, so i...

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Problems solved by technology

However, because the ring cavity needs to surround the micro-nano fiber and remove the tail fiber, it needs to couple light into the fiber through space, so it is difficult to ma

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