Tunable narrow-line-width picosecond pulse laser device
A picosecond pulse and laser technology, applied in the field of lasers, can solve the problems of narrow frequency adjustable range, poor material effect, low single pulse energy, etc., and achieve tunable spectral width and range, high stability, and convenient use Effect
Active Publication Date: 2014-07-30
HEFEI ZHICHANG PHOTOELECTRIC TECH
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Problems solved by technology
Mode-locked lasers can achieve picosecond and femtosecond pulse laser output, but their repetition rate is high (above MHz), frequency adjustable range is narrow, single pulse energy is low, and the effect on materials is poor
Method used
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Embodiment
[0021] The output pulse frequency of the pulse drive circuit used is 1Hz-100kHz, and the current pulse width is 0.9ns; the output center wavelength of the semiconductor laser is 1060nm, the spectral width is 20nm, and its maximum output power is 500mW; the fiber grating type is Bragg grating, the center wavelength The picosecond pulse laser with this structure can obtain a picosecond pulse laser with a spectral tuning range of 1049-1066nm, a laser pulse width of 186ps, a maximum spectral width of 200pm, and a maximum output average power of 152μW.
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The invention discloses a tunable narrow-line-width picosecond pulse laser device, comprising a pulse driving circuit, a semiconductor laser device, an annular device, an optical fiber optical grid, a coupling device, a spectrum analysis unit, a main control unit and a micro-spur traction unit, wherein the pulse driving circuit outputs pulse current to drive the semiconductor laser device to generate one-grade relaxation vibration wide spectrum pulse laser; the pulse laser penetrates through the annular device to be reflected by the optical fiber optical grid; then reflected laser output by the annular device enters the coupling device; the reflected laser with the greater energy is output through an output light port of the coupling device; the reflected laser with the smaller energy is output through a feedback light signal port of the coupling device; the reflected laser with the smaller energy is analyzed and processed by the spectrum analysis unit and the main control unit; and the main control unit drives the micro-spur traction unit and the micro-spur traction unit to carry out micro-spur traction on the axial direction of the optical fiber optical grid. The tunable narrow-line-width picosecond pulse laser device has the advantages of simple structure, easiness for operation, good stability, multi-pulse adjustability, high tuning precision and the like.
Description
technical field [0001] The invention relates to the field of lasers, in particular to a picosecond pulse laser with tunable narrow line width. Background technique [0002] At present, pulsed lasers use Q-switching technology and mode-locking technology to realize pulsed laser output. Q-switched lasers can only achieve pulsed lasers with a pulse width of nanoseconds, and can obtain a single pulse energy output of the millijoule level. Due to the wide pulse width, when it interacts with materials, the heat absorption effect is obvious. Mode-locked lasers can achieve picosecond and femtosecond pulse laser output, but their repetition rate is high (above MHz), the frequency adjustable range is narrow, the single pulse energy is low, and the effect on materials is poor. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a tunable narrow-linewidth picosecond pulse laser, which can realize frequency modulation of 1-100MH...
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IPC IPC(8): H01S5/042H01S5/06
Inventor 王炜吴周令陈坚
Owner HEFEI ZHICHANG PHOTOELECTRIC TECH
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