Totally positive dispersion cavity mode-locked all-fiber laser

A technology of fully positive dispersion and lasers, which is applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems that affect the full fiberization of laser cavities, small spectral intervals, and affect the scope of use, etc., to achieve laser design simplification, The effect of laser cavity stabilization

Inactive Publication Date: 2010-06-16
SUZHOU UNIV
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  • Application Information

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Problems solved by technology

The disadvantages are: 1. The spectral interval of the two different reflection peaks (with different polarization states) caused by the inherent large birefringence of the polarization maintaining fiber is relatively small and the adjustment range is small; 2. Due to the narrow bandwidth Polarization-maintaining fiber grating is used as the reflective surface of the laser cavity, so it is difficult to realize passive mode-locking to generate ultra-short laser pulses; 3. This cavity str

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  • Totally positive dispersion cavity mode-locked all-fiber laser
  • Totally positive dispersion cavity mode-locked all-fiber laser
  • Totally positive dispersion cavity mode-locked all-fiber laser

Examples

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Embodiment 1

[0069] This embodiment provides a mode-locked fully polarization-maintaining doped Yb that works in the full positive dispersion region and is environmentally stable. 3+ The structure of the fiber linear cavity laser uses a section of polarization-maintaining rare-earth-doped gain fiber as the gain medium, and a band-pass polarization-maintaining long-period fiber grating filter with appropriate center wavelength and bandwidth is used in the cavity to select the center wavelength and spectrum of the mode-locked laser. Filter pulse compression components to realize stable mode-locked oscillation of all-fiber ultrashort pulse lasers.

[0070] See attached figure 1 , which is a schematic diagram of the cavity structure of the linear cavity mode-locked fully polarization-maintaining fiber laser in this embodiment; a band-pass polarization-maintaining long-period fiber grating filter with an appropriate center wavelength and bandwidth is used as the center wavelength of the mode-lo...

Embodiment 2

[0072] This embodiment provides a mode-locked dual-wavelength fully polarization-maintaining doped Y that works in the full positive dispersion region and works in a stable environment. b 3+ Structure of a fiber linear cavity laser. A section of polarization-maintaining rare-earth-doped gain fiber is used as the gain medium, and two band-pass polarization-maintaining long-period fiber grating filters with appropriate center wavelength (center wavelength 1.0-1.1μm adjustable) and bandwidth of 4-12nm are applied in the cavity The device is used as an element for selective tuning of the central wavelength of the dual-wavelength mode-locked fiber laser and spectral filtering optical pulse compression. The semiconductor saturable absorber is used to realize the stable mode-locked oscillation of the dual-wavelength all-fiber ultrashort pulse laser.

[0073] figure 2 It is a schematic diagram of the cavity structure of a dual-wavelength all-fiber linear cavity laser that adopts semi...

Embodiment 3

[0075] This embodiment provides a mode-locked dual-wavelength fully polarization-maintaining Y doped with full positive dispersion and stable environment. b 3+ Structure of a linear cavity fiber laser. Two polarization-maintaining rare-earth-doped gain fibers with different lengths are used as the gain medium, and two band-pass long-period polarization-maintaining fiber grating filters with an appropriate center wavelength (1.0-1.1μm) and a bandwidth of 4-12nm are applied in the cavity As an element for selective tuning of the central wavelength of a dual-wavelength mode-locked fiber laser and spectral filtering optical pulse compression, a semiconductor saturable absorber is used to realize the mode-locked oscillation of a dual-wavelength fully positive dispersion cavity all-fiber ultrashort pulse laser.

[0076] image 3 It is a schematic diagram of the cavity structure of a dual-wavelength all-fiber linear cavity laser that uses a semiconductor saturable absorber to achie...

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Abstract

The invention discloses a totally positive dispersion cavity mode-locked all-fiber laser which is a fiber laser structure with high repetition rate and power, simple structure and high efficiency and is an all-fibermode-locked ultrashort laser pulse laser with stable environment and novel structure. The all-fiber laser takes rare earth doped fiber as a laser gain medium, works in a totally positive dispersion area, uses a polarizing beam splitter to split light, uses a band-pass type long-period fiber grating filter for wavelength selectivity of a mode-locked laser centre and spectral filtering light pulse compression of mode-locked laser and takes a semiconductor saturable absorber as fiber laser structures. The totally positive dispersion cavity mode-locked all-fiber laser has picosecond and femtosecond light impulse length polarizing laser output and lasers with the wavelengths longer than 1 micrometer and can be used for pumping-detecting ultrafast light physical experiments or the environmental monitoring and the microwave photonics and biophysics detection of a molecular system, double-wavelength pumping-detecting ultrafast light physical experiments, frequency-combining light radiation generation, coherent anti-Stokes Raman scattering microscopy, micromachining, and the like by being amplified by a high-power fiber amplifier.

Description

technical field [0001] The invention relates to a fiber laser, in particular to a passively mode-locked all-fiber laser with high pulse repetition rate ultrashort laser pulse output, which is suitable for generating stable ultrashort laser pulse output for biomedicine such as multiphoton imaging microscopy Applications, etc. and the use of direct difference frequency method to generate ultrashort pulse mid-infrared laser radiation for pumping and detection of molecular systems and other scientific experiments, environmental monitoring and microwave photonics and biophysical detection, etc., belong to the field of optical information technology. Background technique [0002] Today's scientific experiments such as pumping and detection of molecular systems, environmental monitoring, microwave photonics and biophysical detection require mid-infrared light sources with high average power ultrashort pulses. In recent years, with the development of solid-state laser media such as ...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/08H01S3/106H01S3/098H01S3/16
Inventor 刘东峰张桂菊王钦华余建军
Owner SUZHOU UNIV
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