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All-polarization-maintaining optical fiber mode-locked laser with low repetition frequency and high single-pulse energy

A single-pulse energy, mode-locked laser technology, applied in lasers, laser components, phonon exciters, etc., can solve problems such as difficult to achieve hundreds of kHz repetition frequency, improve stability and reliability, and simplify the system Effect

Pending Publication Date: 2019-10-18
雷小权 +1
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Problems solved by technology

The 8-shaped mode-locked fiber laser composed of nonlinear loop mirrors can be mode-locked by using the full polarization-maintaining fiber structure, but the repetition frequency of all mode-locked fiber lasers in this way is above the order of megahertz, and it is difficult to achieve a hundred Fiber lasers with kHz-level repetition frequency and picosecond or femtosecond-level pulse width

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  • All-polarization-maintaining optical fiber mode-locked laser with low repetition frequency and high single-pulse energy

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Embodiment 1

[0026] Such as figure 1As shown, in this embodiment, the full polarization maintaining fiber laser with low repetition rate and high single pulse energy includes: a first wavelength division multiplexer 1, a second wavelength division multiplexer 7, a first pump source 2, a second Pumping source 8, first polarization-maintaining gain fiber 11, second polarization-maintaining gain fiber 6, hundred-meter level polarization-maintaining fiber 3, bandpass filter 4, fiber coupler 5, fiber splitter 9, fiber isolator 10. Low-power optical amplifier 12, main power optical amplifier 13, dispersion compensation device 14; wherein, the optical fiber beam splitter 9 is a 2´2 beam splitter, including the first to fourth ports; the first wavelength division multiplexer 1 and the second wavelength division multiplexer 7 all have three ports, respectively signal input port, pump port, common port; fiber coupler 5 has three ports of common port, first output port and second output port; the fir...

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Abstract

The invention discloses an all-polarization-maintaining optical fiber mode-locked laser with low repetition frequency and high single-pulse energy, and relates to an optical fiber laser technology. Anoptical fiber beam splitter, a second pumping source and a second polarization-maintaining gain optical fiber form a nonlinear amplification annular mirror; the beam splitter divides the pulse into two beams of light, wherein the two beams of light are transmitted anticlockwise and clockwise and then are return to the beam splitter for interference; the non-linear amplification annular mirror plays a role of a fast saturable absorption body in the mode-locked fiber laser to realize the mode locking; and the ultra-short pulse output of the low repetition frequency high single-pulse energy is realized through power pre-amplification, main power amplification and dispersion compensation. According to the structure, the threshold value of the mode locking starting is greatly reduced, the repeated frequency is lowered, the laser system is simplified, and the overall stability and reliability are improved.

Description

technical field [0001] The invention relates to fiber laser technology, in particular to a fully polarization-maintaining fiber mode-locked laser with low repetition rate and high single pulse energy. Background technique [0002] The growing market demand for high-precision micromachining puts forward higher requirements on the peak power and repetition frequency of laser pulses, and nanosecond pulse lasers generally cannot meet the requirements of fine processing. Ultrashort pulse fiber lasers with low cost, high stability and high gain amplification have attracted widespread attention. These advantages are especially important for industrial materials processing lasers. In the past, most of the high-power lasers with low repetition rate and high single-pulse energy operating in the picosecond or femtosecond region were mode-locked systems that used acousto-optic modulators or electro-optic modulators to select pulses to reduce the repetition rate and amplify them for hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/091H01S3/08H01S3/11
CPCH01S3/06712H01S3/091H01S3/08004H01S3/1106
Inventor 雷小权鲍小志
Owner 雷小权