An electric field regulated optical traveling wave optofluidic dye laser

Abstract

The invention discloses an optical traveling-wave optofluidic dye laser regulated by an electric field. In the prior art, the system is complex, uncontrollable, and requires a high preparation process. The invention utilizes the optical traveling wave optical resonant cavity and combines the electrorheological effect and the optical flow control technology to form a harmonic dye laser. The incident pump beam enters the optical traveling-wave optical resonant cavity through the light-transmitting hole in turn; the optical traveling-wave optical resonant cavity is a double-layer cylindrical shell-shaped cavity, and the inner surface of the outer shell of the cylindrical shell-shaped cavity is provided with a laser reflection layer. The lasing radiation light field is reflected by multiple traveling waves and enhanced by the dye suspension to generate an outgoing laser beam; a control electric field is applied between the inner and outer shells of the cylindrical shell-shaped cavity to realize the regulation of optical resonance conditions and laser emission modes. The invention has the characteristics of an optical traveling wave cavity structure, a simple system, a high degree of miniaturization, a simple preparation process, an electric field-regulated light beam output mode, a high light energy utilization rate, a wide application range, and flexible use.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a laser, in particular to an optical traveling wave optofluidic dye laser regulated by an electric field, which is mainly used for photoelectric detection, 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. [0002] technical background [0003] A laser is a device that uses the principle of stimulated radiation to amplify or oscillate light in certain excited substances. The essential conditions for laser generation are population inversion and gain greater than loss. Generally, laser devices include: excitation source, working medium, and resonant cavity. Excitation is the excitation of the working medium to the excited state after absorbing external energy, ...

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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 linear fineness cavity structure is adopted, and the laser forms an optical standing wave in the high-definition cavity, resulting in uneven distribution of light intensity. And the optical grating is easy to interfere with the laser; 4) The pumping method is paraxial asymmetric pumping. The side of the pump beam is irradiated to the optical gain area and the area containing dye molecules. The pump beam is excited once, and the light energy utilization The efficiency is low, and the uniformity of the pumping effect is not high, which affects the quality of the laser output beam

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