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Photocoupler for coaxial double-path laser enlarging system

A technology of amplifying system and optical coupler, applied in the field of optical coupler, can solve the problems of waste of laser working material and optical components, large structure of laser, etc.

Inactive Publication Date: 2004-11-24
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

Since the main laser of the laser off-axis two-way amplifier adopts an oblique incident mode, the requirements for the working material of the laser and the aperture of the optical components are relatively large, resulting in a large structure of the laser, resulting in waste of the working material and optical components of the laser.

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  • Photocoupler for coaxial double-path laser enlarging system
  • Photocoupler for coaxial double-path laser enlarging system

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Embodiment Construction

[0011] like figure 1 structure shown. Among them, the total reflection mirror 7 is a 45° total reflection mirror, made of K9 glass, a square plate with a size of 140mm in length, 100mm in width, and 10mm in thickness. High reflective film, withstanding laser power > 2 joules / cm 2 . Master Laser G λ1 It is incident on the 45° total reflection mirror at an angle of 45° to the mirror normal, and the beam diameter is Ф80mm. The beam diameter output by the coaxial two-way amplifier is about Ф200mm. After the input lens is focused through the spatial filter, the focal spot size is Ф0.1mm. When it is incident on the optical coupling mirror of the present invention, the focusable power is up to 10 14 W / cm 2 , in order to prevent air breakdown, the optical coupler of the present invention is placed in 2×10 -4 Working under Pa pressure.

[0012] The base, bearing seat and mirror seat of the optical coupler are made of stainless steel. The tab screw is copper material. The optic...

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Abstract

The optical coupler used in laser coaxial double-range amplification system mainly comprises a fully-reflecting mirror with mirror aperture whose central axis makes an angle of 45 deg. with normal line of mirror surface on its central position, at the same time on the guideway seat and base seat there are guideway seat hole and base seat hole whose central axis is identical to that of the mirror apecture. In the mirror aperture a space filter small hole is mounted, and main laser beam, perpendicular to the central axis of mirror aperture, i.e. making anangle is 45 deg. which normal line of mirror surface; is income on the fully-reflecting mirror and back reflected, after it is passed through the amplification system at twice, it can be fed back into the mirror aperture of fully-reflecting mirror on coaxial direction.

Description

Technical field: [0001] The invention is an optical coupler used in a laser coaxial two-way amplifier system, which is mainly used in the optical system of the laser coaxial two-way amplifier. Background technique: [0002] The laser off-axis double-pass amplifier applied on the Beamlet (Beamlet) laser device in the United States, (referring to prior art [1] Performance of NIF prototype Beamlet. B.M.Van Wonderghemetel (LLNL) DE94018500). The laser off-axis double-pass amplifier has changed the traditional laser single-pass amplifier amplification system, and its characteristic is that under the same pumping conditions, the output energy of the laser amplifier is nearly doubled. Since the main laser of the laser off-axis dual-pass amplifier adopts an oblique incident mode, the requirements for the laser working material and optical components are relatively large, resulting in a large laser structure and a waste of laser working materials and optical components. Invention c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/26H01S3/00
Inventor 张明科朱俭张臻范滇元林尊琪牟俊杰郑玉霞
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI