An ultrashort pulse laser generator based on a high saturable absorption sagnac ring

Abstract

The present invention is based on a high saturation absorption Sagnac ring ultrashort pulse laser generator, the pulse laser is connected to the first port of a 2×2 fiber coupler through the first isolator, and the second port of the coupler is connected to the first port of the first wavelength division multiplexer ; The continuous wave pump laser links the second port of the first wavelength division multiplexer through the second isolator, and the third port of the first wavelength division multiplexer passes through the erbium-doped fiber amplifier, the multimode fiber, the polarizer and the second port successively. The first port of the wavelength division multiplexer is connected, the third port of the second wavelength division multiplexer separates the remaining pump signal, the second port of the second wavelength division multiplexer is connected with the third port of the coupler, and the third port of the coupler The four ports are connected to the first port of the dispersion compensation fiber through a filter, and the second port of the dispersion compensation fiber leads out a signal. The invention adopts multimode optical fiber with saturated absorption effect and nonlinearity, EDFA, polarizer and Sagnac ring, can compress and reshape pulsed laser well, and generate ultrashort and high-power pulse.

Description

technical field [0001] The invention belongs to the technical field of lasers, in particular to an ultrashort pulse laser generator based on a high saturation absorption Sagnac ring. Background technique [0002] High power ultrashort pulse lasers are widely used and play an important role in military and civil communication technology. In terms of communication, the generation of ultrashort pulses is conducive to the generation of pulses with a high repetition rate, which can further improve the capacity of communication. In military terms, the narrower the time width of the laser, the lower the average power, but the peak power of the pulse can be further increased. As a weapon or laser communication, it is playing an increasingly important role. Although there are pulse shaping devices using Sagnac rings at present, the integrated erbium-doped fiber amplifiers and saturable absorbers have not been seen yet. [0003] Based on the present situation above, the present inv...

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Problems solved by technology

Although there is also a Sagnac ring as the most pulse shaping device at present, the integrated erbium-doped fiber amplifier and saturable absorber have not yet been seen.

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