Adjustable and controllable optical flow control dye laser based on electrorheological effect

Abstract

The invention discloses an adjustable and controllable optical flow control dye laser based on an electrorheological effect. A system in the prior art has the defects of complexity, incapability of adjusting and controlling and very high requirement on the preparation process. The electrorheological effect and an optical flow control technology are combined to form an adjustable and controllable optical resonant cavity, thereby constructing a tunable laser with an electric field adjusting and controlling laser output mode. Incident pump beams are form a converged pump light field after being subjected to beam shaping and spatial light modulation in sequence; the resonant cavity is a cylindrical cavity, two circular end faces are high-reflecting surfaces for forming optical feedback, the cavity is filled with a dye suspension, and the cavity is provided with an electrode for an external control electric field, thereby realizing an electric field adjusting and controlling optical resonance condition and a laser emitting mode. The adjustable and controllable optical flow control dye laser has the advantages of the conventional optical flow control laser as well as the characteristics of adjustable resonance cavity performance, controllable output beam mode, simplified system structure, simple preparation process, high miniaturization degree, good beam quality, axially symmetric optical pumping, high pumping optical energy utilization ratio and the like.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a laser, in particular to an electrorheological effect-based adjustable optofluidic dye laser, which is mainly used in spectrum technology, laser measurement, optical fiber communication, laser processing, laser marking, and laser welding , laser guidance, laser medicine, wireless optical communication, optical micro-manipulation, optical microscopy and other fields as a laser light source. technical background [0002] A laser is a device that uses the principle of stimulated radiation to amplify or oscillate light in certain excited substances. The working principles of various lasers are basically the same. The indispensable conditions for laser generation are particle number reversal and large gain over loss. The essential components of the device are the excitation source and the working medium with metastable energy levels. part. Excitation is the excitation of the working...

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Problems solved by technology

The laser has considerable advantages, but there are still some essential deficiencies: 1) The system uses optical gratings to form feedback, and constructs optical gratings in three-dimensional optical waveguides to form a distributed feedback system, and then forms an optical resonant cavity, all of which are microscopic structures , so in essence, the system has high requirements on the preparation process, and the preparation process of the laser is complicated and difficult, and the whole system is complicated; 2) Once the optical microstructure in the system is formed, it cannot be changed, and the structure of the optical resonant cavity cannot be adjusted. , resulting in the non-adjustable mode of the output beam of the laser, which affects the use range and application flexibility of the light source; 3) The pumping method in the prior art is a paraxial asymmetric pump, and the side of the pump beam is irradiated into the optical gain area, and The area containing dye molecules affects the uniformity of the pumping effect, and the entire stimulated radiation system has asymmetry, which affects the quality of the laser output beam. At the same time, the utilization rate of pumping light energy is low

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