Diode laser spectrum synthesizer based on double-grating external cavity feedback

A diode laser and external cavity feedback technology, applied in the field of lasers, can solve the problems of low flexibility in spectral parameter adjustment, reduced optical path space volume, and high precision requirements, achieving convenient and flexible installation and adjustment, reduced optical path space volume, and difficult processing Reduced effect

Inactive Publication Date: 2015-02-04
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a diode laser spectrum synthesis system based on dual-grating external cavity feedback in order to overcome the deficiencies of the existing diode laser spectrum synthesis system, such as high component position accuracy requirements, low spectral parameter adjustment flexibility, and large space volume. The technical scheme of the device has no strict requirements on the distance between the diode laser light source and the first grating, the distance between the second grating and the external cavity mirror, the volume of the optical path space is reduced, the installation is convenient and flexible, and the system capacity is increased. Reliability and Engineering Feasibility

Method used

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  • Diode laser spectrum synthesizer based on double-grating external cavity feedback
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  • Diode laser spectrum synthesizer based on double-grating external cavity feedback

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Embodiment 1

[0022] figure 1 Among them, a diode laser spectrum synthesis device based on double grating external cavity feedback of the present invention includes a diode laser light source 1, a first grating 2, a second grating 3, and an external cavity mirror 4, which are used for power synthesis of the diode laser.

[0023] The diode laser light source 1 is composed of a diode laser array 5, a fast-axis collimating lens 6 and a slow-axis collimating lens (7, 8, 9). The front cavity of the light-emitting unit of the laser array 5 is coated with a strong light-resistant anti-reflection film, and the residual reflectivity is less than 0.5%. The first grating 2 is a transmissive plane grating, the base material is fused silica, and the diffraction efficiency is greater than 95%. The second grating 3 is a transmissive plane grating, the base material is fused silica, the parameters such as center wavelength and grating constant are exactly the same as those of the first grating, and the di...

Embodiment 2

[0025] The basic structure of this embodiment is the same as that of Embodiment 1. The difference is that in Embodiment 1, the first grating 2 and the second grating 3 are transmissive plane gratings. In this embodiment, the first grating 2 and the second grating 3 are both Reflective plane grating.

Embodiment 3

[0027] The basic structure of this embodiment is the same as that of Embodiment 1 or Embodiment 2. The difference is that Embodiment 1 and Embodiment 2 only use a single-chip diode array for spectrum synthesis, and the diode laser light source 1 in this embodiment is composed of multiple chips. The diode laser arrays are superimposed in parallel in the fast axis direction. Each diode laser array is equipped with a fast axis collimating lens and a slow axis collimating lens, respectively, in the fast axis direction and the slow axis direction. Align.

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Abstract

The invention provides a technical scheme about a diode laser spectrum synthesizer based on double-grating external cavity feedback. The diode laser spectrum synthesizer includes a diode laser light source, a first grating, a second grating and an external cavity lens; the diode laser light source includes a diode laser stack, a fast axis collimating lens and a slow axis collimating lend; laser beams output by the diode laser light source are incident on the first grating and diffracted, the diffracted light beams are incident on the second grating, and the light beams are incident into the external cavity lens after being subjected to beam combination by the second grating; the external cavity lend is perpendicular to the light beam propagation direction, for providing feedback laser and meanwhile achieving output of light. The diode laser spectrum synthesizer does not have strict requirements on distance between the diode laser light source and the first grating and distance between the second grating and the external cavity lens, reduced in spatial volume of light path, convenient and flexible to install and just and increased in system reliability and engineering feasibility.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a diode laser spectrum synthesis device based on double grating external cavity feedback. Background technique [0002] In the prior art, the well-known technology is that diode lasers have the advantages of wide wavelength coverage, high electro-optical conversion efficiency, small size, low cost, long life, etc. The field has a wide range of application prospects, but the shortcomings of the current commercial diode laser unit, such as low output power and poor beam quality, limit its direct application. The spectral synthesis technology based on external cavity feedback can ensure high beam quality while achieving diode laser output power amplification. Theoretically, the combined beam quality is equivalent to a single light-emitting unit participating in the synthesis. Spectral beam combining of a broad-stripe diode laser array in an external cavity, Daneu V., San...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/06H01S5/14
Inventor 张凯田飞范国滨李建民卢飞叶一东谭昊孟慧成武德勇尹新启颜宏陈黎邹凯
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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