Laser diode array dual feedback external cavity laser

A laser diode, dual feedback technology, applied in the field of external cavity lasers, can solve the problem of inability to improve spatial characteristics, and achieve the effect of improving spatial characteristics and spectral characteristics

Inactive Publication Date: 2006-09-06
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

This single feedback using dispersive elements can only improve the spectral characteristics of the output laser, but cannot improve its spatial characteristics

Method used

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  • Laser diode array dual feedback external cavity laser

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Embodiment Construction

[0017] see first figure 1 , as can be seen from the figure, the laser diode array double feedback external cavity laser of the present invention includes a laser diode array 1, and a fast axis collimating mirror 2 and a lens 3 are arranged in the fast axis direction of the laser diode array 1, and in the The top behind the lens 3 is a concave lens 4 and a grating 5, and the bottom is a spherical reflector 6. The lens 3 and the spherical reflector 6 constitute a feedback cavity for a path of light propagating downward, and the lens 3 will transmit a path of light downward The light converges at the focal point of the spherical reflector 6; the lens 3, the plano-concave lens 4 and the grating 5 constitute a feedback chamber for the upwardly propagating one-way light, and the lens 3 converges the upwardly-spreading one-way light on the focal point of the concave lens 4, and passes through the concave lens After 4, the light beam is coupled to the grating 5 in parallel, where the ...

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Abstract

The present invention refers to laser diode array double feedback outer cavity laser. It contains making alignment to laser diode array output light by fast axis, transmitting in two ways in slow axis direction, spherical reflector dispersion element constructed double feed-back outer cavity respectively to proceed spatial filtering and mode selection to this two ways light, said spherical reflector and dispersion element constituting one resonant cavity. The present invention raises laser diode array output laser spectra and spatial character, capable of realizing high power, narrow linewidth, and high-brightness laser output.

Description

Technical field: [0001] The invention relates to an external cavity laser, in particular to a laser diode array double-feedback external cavity laser, which can obtain laser output with high power, narrow line width and high brightness. Background technique [0002] High-power laser diode arrays are widely used due to their low price, compact structure, and easy operation. However, because the typical line width of the laser diode array is 2-4 nm, and the beam quality is relatively poor, many applications are limited. [0003] Using external cavity feedback to narrow the spectral line width is an effective method. Various external cavity designs are mostly aimed at a single low-power laser diode [Opt. Lett.27, 1995 (2002)], and the external cavity of a high-power laser diode array is basically realized by the feedback of a dispersive element (grating) [Opt. Lett. 25, 1352 (2000)]. This single feedback using a dispersive element can only improve the spectral characteristic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/14H01S5/40
Inventor 楼祺洪苏宙平董景星周军魏运荣
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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