Narrow-linewidth mode-locking thulium-doped fiber laser with high repetition rate

Abstract

The invention discloses a narrow-linewidth mode-locking thulium-doped fiber laser with a high repetition rate, which belongs to the technical field of fiber lasers. In order to improve the repetitionrate outputted by the passive mode-locking thulium-doped fiber laser, a pumped laser is connected with an erbium ytterbium co-doped fiber amplifier; the erbium ytterbium co-doped fiber amplifier is connected with a wavelength division multiplexer, and the wavelength division multiplexer is connected with a thulium-doped fiber; the thulium-doped fiber is connected with an isolator, and the isolatoris connected with a filter; the filter is connected with an output coupler, and output light is outputted through the output coupler; the output coupler is connected with a single-mode fiber, the single-mode fiber is connected with a second polarization controller, the second polarization controller is connected with a polarizer, the polarizer is connected with a first polarization controller, and the first polarization controller, the polarizer and the second polarization controller are used as mode-locking elements to realize nonlinear deflection effect passive mode-locking; and the first polarization controller is connected with the wavelength division multiplexer to form a ring cavity. The narrow-linewidth mode-locking thulium-doped fiber laser with a high repetition rate is applicable to fields of optical communication, spectroscopy, precision optical sampling and other technologies.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, in particular to a narrow-linewidth mode-locked thulium-doped fiber laser with high repetition frequency. Background technique [0002] The 2μm-band fiber laser operating in the eye-safe band has potential application prospects in remote sensing, medicine, lidar technology, free space optical communication and many other fields and has attracted widespread attention. [0003] High repetition rate fiber lasers have the advantages of low threshold, high efficiency, tunability, and simple structure. They play an important role in realizing high-speed communication, spectroscopy and precision optical sampling technology. Therefore, it is important to study 2 μm high repetition rate fiber lasers. practical meaning. [0004] At present, the main methods to achieve high repetition frequency are: increasing the fundamental frequency by shortening the cavity length to achieve high repetition frequen...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the fiber dispersion compensation device technology in the 2μm band, it is difficult to achieve a higher repetition rate fiber laser

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