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Tunable all-fiber mode-locked laser

A mode-locked laser, all-fiber technology, applied in the field of optical information, can solve the problems affecting the long-term stability of the mode-locked fiber laser, affecting the full-fiberization of the laser cavity, and the high cost of the laser, achieving high laser pulse energy and manufacturing costs. The effect of low and low production cost

Inactive Publication Date: 2011-02-09
SUZHOU UNIV
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Problems solved by technology

The above-mentioned technology adopts the concept of working in the negative dispersion region, and there are solid diffraction grating pairs or photonic bandgap fiber gratings in the cavity for dispersion compensation, etc., which also affects the full-fiber laser cavity and affects the long-term stability of the mode-locked fiber laser. Sex, or the cost of the laser is very expensive to affect its scope of use

Method used

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  • Tunable all-fiber mode-locked laser

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Embodiment 1

[0030] This embodiment provides a mode-locked Y-doped mode working in a fully positive dispersion annular cavity b 3+ For fiber lasers, that is, in the laser cavity, the dispersion of all fiber components is normal dispersion.

[0031] It uses a single-mode rare-earth-doped gain fiber as the gain medium, and a band-pass long-period band-pass type with an appropriate center wavelength (1.0-1.1μm), bandwidth (4-20nm) and wavelength tunable range (0-12nm) is applied in the cavity. The fiber grating filter is used as a component for the center wavelength selection of the mode-locked laser and the optical pulse shaping and compression of spectral filtering to realize the stable mode-locked oscillation of the all-fiber ultrashort pulse laser.

[0032] See attached figure 1 , which is a structural schematic diagram of a tunable mode-locked laser provided in this embodiment; it uses the nonlinear polarization rotation effect to realize the ring cavity mode-locked all-fiber laser cav...

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Abstract

The invention discloses a tunable all-fiber mode-locked laser. A fiber laser structure with high repetition rate, high power, simple structure and high efficiency is generated by utilizing rare-earth doped fiber as a laser gain medium, working in a total positive dispersion region, splitting light by a polarising beam splitter, utilizing a band pass tunable long period fiber grating filter as mode-locked laser center wavelength selection and the spectrum filter light impulse compression of the mode-locked laser, and semiconductor saturable absorber as a mode-locked element and the like. The tunable all-fiber mode-locked laser is a mode-locked ultra short laser pulse laser capable of realizing all fiber with environmental stability and novel structure, can output picosecond and femtosecond light impulse polarization laser with laser wavelength more than 1mu m, and can be widely applied in the fields of biology, medication, optical precision finishing and the like.

Description

technical field [0001] The invention relates to a tunable fiber laser, in particular to a tunable passive mode-locked all-fiber laser with high pulse repetition rate ultrashort laser pulse output, which is suitable for generating stable tunable ultrashort laser pulses and is widely used in medicine Imaging, biological applications and optical precision measurement, etc., belong to the field of optical information technology. Background technique [0002] Ultrashort pulse light sources with stable and tunable wavelength play an important role in high-speed wavelength division multiplexing / optical time division multiplexing communication systems. Ultrashort pulse fiber lasers pumped by semiconductor lasers have significant advantages over conventional laser systems in terms of heat dissipation, stability, beam quality, conversion efficiency, volume, compatibility with existing systems, and adjustments. , an important direction for the development of solidification and integra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067
Inventor 朱晓军王钦华葛静
Owner SUZHOU UNIV
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