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Erbium-doped wedge-shaped waveguide amplifier capable of achieving high efficiency, large energy and small size

A wedge-shaped waveguide, high-energy technology, applied in the structure/shape of the active medium, the structure/shape of the optical resonator, lasers, etc., can solve the problem of high optical power density at the incident end face, serious thermal lens effect, and unsuitable for small-scale ranging and other problems, to achieve the effect of increasing the output laser energy, improving the energy storage efficiency, and improving the energy storage efficiency

Inactive Publication Date: 2020-10-13
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among several amplifiers that realize eye-safe lasers, the erbium-doped fiber amplifier has a strong nonlinear effect and a large size, which restricts its application in small-scale ranging; side diode-pumped rod-shaped, Square columnar amplifiers are not suitable for small-sized ranging applications due to their large size and severe thermal effects; end-pumped rod-shaped and square columnar amplifiers have high incident end surface optical power density, which results in serious thermal lens effects. Limits the increase in output power

Method used

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  • Erbium-doped wedge-shaped waveguide amplifier capable of achieving high efficiency, large energy and small size
  • Erbium-doped wedge-shaped waveguide amplifier capable of achieving high efficiency, large energy and small size
  • Erbium-doped wedge-shaped waveguide amplifier capable of achieving high efficiency, large energy and small size

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Embodiment Construction

[0027] Attached below Figure 1 to Figure 6 The content of the wedge-shaped waveguide structure laser amplifier of the present invention is further described:

[0028] refer to figure 1 , is the block diagram of the eye-safe laser amplifier. The amplifier consists of an erbium glass wedge waveguide structure 1, a pump source 2, a pump coupling system 3, a reflection structure 4, a seed source 5, and a seed coupling system 6.

[0029] In the erbium glass wedge waveguide structure, the core layer uses erbium-ytterbium co-doped phosphate glass as the laser gain medium, the upper and lower, left and right inner cladding layers are cobalt-doped silicate glass, the upper and lower outer cladding layers are K9 optical glass, and the large surface is cobalt-doped silicate glass. Salt glass, three materials bonded together using thermal bonding, see image 3 , the pump light is incident through the wedge-shaped surface, and the seed light (1535nm) is incident into the gain medium fr...

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Abstract

The invention discloses an erbium-doped wedge-shaped waveguide amplifier capable of realizing high efficiency, large energy and small volume. A wedge-shaped double-cladding erbium glass waveguide structure is used, pump light is fully absorbed after passing through a gain medium for multiple times, and the absorption length and the absorption uniformity of the gain medium are increased, so that the heat effect is improved, and the pump absorption efficiency is effectively improved. A gain medium wraps the four sides of a material which absorbs 1.5 microns and does not absorb pump light, so that a self-excited oscillation loop is cut off, the influence of ASE is improved, the energy storage efficiency is improved, and the output laser energy is improved. The novel waveguide structure is small in size and compact in structure. The inner cladding and the outer cladding play a role of heat sink for the erbium glass, so that the gain medium can better dissipate heat, the temperature gradient of the center and the side surface of the gain medium is effectively improved, the heat effect is reduced, and high-energy output is realized. The amplifier gain medium is prepared by adopting a bonding technology, so that the whole structure of the amplifier is simpler and more compact, and integration and structural miniaturization are easy to realize.

Description

technical field [0001] The invention relates to a high-efficiency, high-energy, small-volume erbium-ytterbium co-doped phosphate glass waveguide narrow pulse amplifier. A new structure was designed, including pump effective absorption structure, ASE suppression structure, and a new waveguide amplifier was formed by bonding between Erbium-ytterbium co-doped phosphate glass, cobalt-doped silicate glass and K9 optical glass. The invention belongs to the technical field of solid laser amplifiers. Background technique [0002] The 1.5μm laser is in the "safe wavelength for human eyes", has a high allowable exposure to the human eye, is in the "atmospheric window", and has a strong penetrating ability to smoke and fog, and has become an important laser wavelength in the field of laser ranging. The 1.5μm laser using erbium glass (Er:Yb:glass) as the gain medium has become a laser for civil and military distance measurement due to its small size, high conversion efficiency, and low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/063H01S3/04H01S3/042H01S3/06H01S3/08
CPCH01S3/0405H01S3/042H01S3/0604H01S3/063H01S3/08059
Inventor 李强邢晓文惠勇凌姜枫雷訇朱占达
Owner BEIJING UNIV OF TECH
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