Random laser based on wave-guiding structure

A random laser and waveguide structure technology, applied in the laser field, can solve the problems that it cannot be used as a light source for micro-nano integrated optical systems, and achieve the effects of easy implementation, lower emission threshold, and lower scattering loss

Inactive Publication Date: 2013-05-15
YANSHAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a random laser with an epitaxial layer waveguide structure and based on the constant flux th

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  • Random laser based on wave-guiding structure

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Embodiment Construction

[0012] Such as figure 1 As shown, it is a random laser based on a waveguide structure, and its structure includes a pumping light source 1. The pumping light source can be a typical Nd:YAG laser, which is incident from the side of the waveguide to provide energy for the internal ZnO random particles 3; The waveguide structure formed by ZnO particles is surrounded by MgO cladding layer 2 with a thickness of 200nm; ZnO random particles play the role of scattering and providing gain in this structure; and MgO cladding layer 2 has a smaller refractive index than ZnO random particles 3. Therefore, when the scattered light propagates to the MgO cladding layer 2 or the MgO cladding layer 2 and air, it will be fed back into the waveguide in the form of total reflection, thereby reducing the threshold of scattering loss and laser radiation 4 .

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Abstract

The invention discloses a random laser based on a wave-guiding structure. The random laser based on the wave-guiding structure comprises a pumping light source, and further comprises the wave-guiding structure formed by ZnO random particles and organic polymers. A magnesium oxide (MgO) coating layer is plated on the periphery of the wave-guiding structure. The pumping light source stimulates a ZnO waveguide from one side, and waveguide one-side incidence is adopted as a pumping mode. The random laser based on the wave-guiding structure ensures that the random laser can achieve directionality exit, and is not limited to the fact that an emitter of a random laser in the prior art is limited to a round disc, a nanorod and the like. Meanwhile, the random laser based on the wave-guiding structure can further reduce scattering loss and emission threshold values of light in the waveguide, random laser light of the wave-guiding structure can provide a micro-nano optical integration system with quite ideal light sources, and compared with the prior art, the random laser based on the wave-guiding structure is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of lasers, and specifically refers to a random laser based on a waveguide structure. Background technique [0002] In the past ten years, in the field of random media, scholars at home and abroad have discovered high-intensity stimulated emission of radiation many times, especially in the ZnO semiconductor random media observed by H. Cao et al. from Northwestern University in recent years. phenomenon is represented. They ideally described the luminescence characteristics in random media with the theory of ring cavity and photon localization, and they are called random lasers because they are obviously different from the stimulated emission of traditional lasers. In view of the preparation conditions and physical characteristics of the random laser, and its broad application prospects in the fields of micro-nano integrated optics, optoelectronics, special wave bands, and medical detection, it has received ex...

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Application Information

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IPC IPC(8): H01S5/22H01S5/30
Inventor 李志全孙宇超牛立勇李欣李文超
Owner YANSHAN UNIV
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