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Quick elapse wave excitation and gain coupling multi-band echo wall mode optical laser

A technology of whispering gallery mode, fiber laser, applied in lasers, laser parts, phonon exciters, etc., can solve problems such as unfavorable cavity stability

Inactive Publication Date: 2009-09-30
YUNNAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In traditional spherical and cylindrical whispering gallery mode microcavity lasers, the cavity itself is the gain medium. Due to the thermally induced refractive index change and electrostrictive effects of the gain medium during the pumping process, the gain medium and the cavity are combined into one The structural characteristics are not conducive to the stability of the cavity

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  • Quick elapse wave excitation and gain coupling multi-band echo wall mode optical laser
  • Quick elapse wave excitation and gain coupling multi-band echo wall mode optical laser
  • Quick elapse wave excitation and gain coupling multi-band echo wall mode optical laser

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Embodiment Construction

[0032] Attached below Figure 2-6 , the present invention will be further described.

[0033] The device in the embodiment is as figure 2 shown. The frequency-doubled YAG laser 11 is used as the pumping light with a pulsed laser with a wavelength of 532 nm. After the pumping light is polarized by a linear polarizer 12, it passes through another linear polarizer 13, and the polarization direction of 13 is parallel to the Y-Z plane. Rotate the polarization direction of 12 to obtain the required pump energy. A beam splitter 14 is placed in the optical path so that the instantaneous pumping energy can be measured by a laser energy meter 15 . The pumping light is converged in front of the fiber end by a focusing lens 16 with a focal length of 75mm, and i A cone angle of =7.6° enters a single-index silica fiber 2 with a diameter of 286.1 μm along the axis. The optical fiber 2 is inserted into the glass sleeves 5 and 6, and the ethanol solutions of different laser dyes are con...

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Abstract

The present invention provides an evanescent wave encouraging and gain-coupling multi-band Echo Wall mode fiber laser, belonging to encouraging gain by the axial or adaxial evanescent wave, the laser gain enters in the round resonator by the Echo Wall mode evanescent-field coupling in the round resonator formed by the optical fibre section, generating laser oscillation under the support of the optical feedback provided by the Echo Wall mode in the cavity. Since the laser gain distribution and the Echo Wall mode evanescent field in the resonator are overlapped in an ideal space, the fiber laser has high optical pumping efficiency and longer gain length along the fibre axis. Different laser gain mediums are fillded in the fibre axial subsection, the Echo Wall mode laser radiation having different wavelength range is generated in one fibre, the multiple wave bands fibre laser plays an important role in field of laser full color display and minitype electronic device integration.

Description

Technical field [0001] The invention belongs to the technical field of laser and waveguide optics, and relates to a light pumping method, through the evanescent wave excitation gain of the pumped light and the evanescent field coupling gain of the whispering gallery mode, echoes of different wavelength ranges are simultaneously generated in an optical fiber Wall-mode laser radiation. Background technique [0002] Optical microcavities characterized by whispering gallery modes with high quality factors (Q values) are highly valued in the research and application of low-threshold and ultra-low-threshold microcavity lasers. In traditional spherical and cylindrical whispering gallery mode microcavity lasers, the cavity itself is the gain medium. Due to the thermally induced refractive index change and electrostrictive effects of the gain medium during the pumping process, the gain medium and the cavity are combined into one The structural characteristics are not conducive to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/16H01S3/091H01S3/08
Inventor 普小云江楠白然向文丽张远宪韩德昱
Owner YUNNAN UNIV