Filtering endoscope used for optical fiber laser and optical fiber laser

A fiber laser and filter cavity technology, which is applied in the field of filter cavity mirrors, can solve the problems of damage to gratings and common coatings, affect performance, ablation, etc., achieve high damage threshold cavity mirrors, be easy to implement, and improve the effect of beam quality.

Inactive Publication Date: 2013-01-30
TSINGHUA UNIV
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  • Application Information

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Problems solved by technology

However, in a high-power laser, the strong beam will cause certain damage to the grating and the ordinary coating, which will change the refractive index of the grating or the film structure of the coating, affecting its performance; in severe cases, they will be ablated, making them fail

Method used

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  • Filtering endoscope used for optical fiber laser and optical fiber laser
  • Filtering endoscope used for optical fiber laser and optical fiber laser
  • Filtering endoscope used for optical fiber laser and optical fiber laser

Examples

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Embodiment 1

[0037] Such as figure 2 As shown, this embodiment is a fiber laser using a filter cavity mirror. LD pumping source (9), end-face coatings (10), (11), double-clad fiber (3) and filter fiber (2) form a basic Fabry-Perot resonant cavity, and coatings (10), (11) at both ends of the fiber ) as a laparoscope. The coated cavity mirror (10) at the left end is highly transparent to the pump light and highly reflective to the fiber laser; the coating (11) as the output cavity mirror is highly transparent to the pump light and partially transparent to the fiber laser. The numerical aperture of the double-clad optical fiber (3) is larger, and the numerical aperture of the filter optical fiber (2) is smaller. The core diameters of the two types of optical fibers are the same, the cladding structure is the same, and the refractive index distribution of the cross section adopts a step distribution. The pump light is injected into the inner cladding of the fiber from the side to excite las...

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Abstract

The invention relates to a filtering endoscope used for an optical fiber laser and the optical fiber laser, which belongs to the technical field of endoscopes and is characterized in that the filtering endoscope used by an optical fiber laser is formed by coaxially connecting optical fibers plated with thin layers with different optical properties and doped optical fibers serving as gain media. The optical fiber laser comprises a filtering endoscope and a pumping device for injecting pump light into gain optical fibers. Since the used filtering endoscope is formed by plating the film on an end surface, and the anti-damage threshold of the filtering endoscope is higher, the laser can work under high power; since the filtering endoscope comprises filtering optical fibers the structural parameters of which are different from those of the gain optical fibers, high-order mode loss is increased in laser oscillation and transmission, and the quality of output light beams is improved.

Description

technical field [0001] The invention relates to a filter cavity mirror, in particular to a filter cavity mirror for a fiber laser and a fiber laser. Background technique [0002] As one of the most cutting-edge research topics in the field of optoelectronic technology research, fiber lasers are widely used in many fields such as optical data storage, optical communication, sensing technology, spectroscopy and medical applications. In the research process of fiber lasers, high power and high beam quality output has become a focus of attention. [0003] To achieve high power output, it is not only necessary to set standards for the selection of gain media and pump sources, but also the design and selection of cavity mirrors is also an important aspect. The characteristic parameters of the cavity mirror must be able to meet the requirements of high-power laser oscillation. In order to make the structure of the laser simple and the optical path easy to adjust, the current fibe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/08H01S3/098
Inventor 巩马理闫平张海涛廖素英郝金坪
Owner TSINGHUA UNIV
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